Database Develop

setup issue "We weren't able to discover your Chromecast on the network"

I'm trying to connect my chrome cast to my wireless AP. I get the error message "We weren't able to discover your Chromecast on the network"
I've read that AP isolation is the problem, but I'm pretty sure that isn't enabled. And if it is, I have no way of disabling it.
I have a dlink DGL-4500 and a DAP-1360 running in parallel. Same ssid, same password, same channel. It's a seamless transition from one to the other when I walk from one to the other. I can even stream video with no problems.
Chromecast won't connect to my AP. I don't have wlan partition enabled. I don't have igmp snooping enabled.
I do have wmm enabled.

jptech said:
I'm trying to connect my chrome cast to my wireless AP. I get the error message "We weren't able to discover your Chromecast on the network"
I've read that AP isolation is the problem, but I'm pretty sure that isn't enabled. And if it is, I have no way of disabling it.
I have a dlink DGL-4500 and a DAP-1360 running in parallel. Same ssid, same password, same channel. It's a seamless transition from one to the other when I walk from one to the other. I can even stream video with no problems.
Chromecast won't connect to my AP. I don't have wlan partition enabled. I don't have igmp snooping enabled.
I do have wmm enabled.
Click to expand...
Click to collapse
Have you tried turning one of them off to verify? Also are you running on 2.4, 5 ghz or dualband? I'm using cisco/linksys setup with a repeater (regular router on ddwrt) but they all have different ssids(3 total) and I know it works between them except obviously the chromecast won't connect to the 5ghz one.

Slowb00st said:
Have you tried turning one of them off to verify? Also are you running on 2.4, 5 ghz or dualband? I'm using cisco/linksys setup with a repeater (regular router on ddwrt) but they all have different ssids(3 total) and I know it works between them except obviously the chromecast won't connect to the 5ghz one.
Click to expand...
Click to collapse
I only use 2.4GHz. the DGL-4500 is either/or.
I've turned off the wireless on the AP, but the range of the router is too far away to connect.
I tried it directly on the DGL-4500 and it worked the first time. Then half-way through a movie, my phone refused to find the chromecast device again. I had to do a hard reset.

I can find no setting for AP isolation on the DGL-4500. Does anyone else have this router and having it working with an AP?

dgl-4500 - chromecast connection problems
jptech said:
I can find no setting for AP isolation on the DGL-4500. Does anyone else have this router and having it working with an AP?
Click to expand...
Click to collapse
i have a dgl-4500 and haven't yet been able to get my chromecast to connect to my WPA2 network. i get the same error msg "We weren't able to discover your Chromecast on the network". MAC filtering is disabled. uPnP is enabled. i rebooted the router. it just won't connect! you're saying you got the chromecast to connect to your dgl-4500 at least once?

brukelen said:
i have a dgl-4500 and haven't yet been able to get my chromecast to connect to my WPA2 network. i get the same error msg "We weren't able to discover your Chromecast on the network". MAC filtering is disabled. uPnP is enabled. i rebooted the router. it just won't connect! you're saying you got the chromecast to connect to your dgl-4500 at least once?
Click to expand...
Click to collapse
I don't have the same router, but I had to turn NAT off, connect, then turn NAT back on for it to work

athorax said:
I don't have the same router, but I had to turn NAT off, connect, then turn NAT back on for it to work
Click to expand...
Click to collapse
I had to remove my DAP-1360 from the network, then it connected instantly.
brukelen said:
i have a dgl-4500 and haven't yet been able to get my chromecast to connect to my WPA2 network. i get the same error msg "We weren't able to discover your Chromecast on the network". MAC filtering is disabled. uPnP is enabled. i rebooted the router. it just won't connect! you're saying you got the chromecast to connect to your dgl-4500 at least once?
Click to expand...
Click to collapse
Make sure WLAN partition is off.
My settings finally were 20MHz single channel, WPA2 PSK, Mixed BGN.
My network is hybrid. I've got the DGL-4500 as the main router. I've got another Linksys WRT120Nish as an AP (which the chromecast is actually connected to at the moment and I've got the DAP-1360 setup in repeater mode in the middle.

Chromecast can't connect to my router TL-WDR4300

Hi all,
I have a TP-Link TL-WDR4300 at home. My Chromecast is having issue connecting to this router. When i run through Chromecast setup, it goes fine up to the point where it asks me for password of my router. After I enter my password and click next, my TV would just say 'connecting...' and it will stuck forever. And the Chromecast setup app will say "Something went wrong. We weren't able to find your Chromecast on the network." Apparently because it wasn't able to connect to my network.
I'm pretty sure I have my password entered correctly. I tried to changed my router settings but it won't help at all.
One interesting thing is that my Chromecast used to be able to connect to my router before it was updated(which happened automatically when I connected Chromecast to my router for the last time). Although I had similar connection issues in the past, I was able to fix it by a combination of resetting Chromecast, rebooting router and changing router settings. Now, it just won't connect no matter what I do.
Any help is greatly appreciated!

rozzerhmq said:
Hi all,
I have a TP-Link TL-WDR4300 at home. My Chromecast is having issue connecting to this router. When i run through Chromecast setup, it goes fine up to the point where it asks me for password of my router. After I enter my password and click next, my TV would just say 'connecting...' and it will stuck forever. And the Chromecast setup app will say "Something went wrong. We weren't able to find your Chromecast on the network." Apparently because it wasn't able to connect to my network.
I'm pretty sure I have my password entered correctly. I tried to changed my router settings but it won't help at all.
One interesting thing is that my Chromecast used to be able to connect to my router before it was updated(which happened automatically when I connected Chromecast to my router for the last time). Although I had similar connection issues in the past, I was able to fix it by a combination of resetting Chromecast, rebooting router and changing router settings. Now, it just won't connect no matter what I do.
Any help is greatly appreciated!
Click to expand...
Click to collapse
I would reset everything and then try the setup program again if you haven't tried that already.

When you say "changing router settings", does this include channel width? Is it set to auto? Have you tried setting it to something manually, preferably 20MHz? Also what is your Network Mode set to?

mdamaged said:
When you say "changing router settings", does this include channel width? Is it set to auto? Have you tried setting it to something manually, preferably 20MHz? Also what is your Network Mode set to?
Click to expand...
Click to collapse
Yes. I am using the 2.4GHz wireless only
I tried changing all these setting
Mode: abgn
Channel Width: 20mhz-40mhz
Channel: 1 - 6 - 11

rozzerhmq said:
Yes. I am using the 2.4GHz wireless only
I tried changing all these setting
Mode: abgn
Channel Width: 20mhz-40mhz
Channel: 1 - 6 - 11
Click to expand...
Click to collapse
Have you tried using the HDMI extender? That can help a lot in some circumstances. It's amazing how much a TV and other electronics will interfere with WiFi signals.

rozzerhmq said:
Hi all,
I have a TP-Link TL-WDR4300 at home. My Chromecast is having issue connecting to this router. When i run through Chromecast setup, it goes fine up to the point where it asks me for password of my router. After I enter my password and click next, my TV would just say 'connecting...' and it will stuck forever. And the Chromecast setup app will say "Something went wrong. We weren't able to find your Chromecast on the network." Apparently because it wasn't able to connect to my network.
I'm pretty sure I have my password entered correctly. I tried to changed my router settings but it won't help at all.
One interesting thing is that my Chromecast used to be able to connect to my router before it was updated(which happened automatically when I connected Chromecast to my router for the last time). Although I had similar connection issues in the past, I was able to fix it by a combination of resetting Chromecast, rebooting router and changing router settings. Now, it just won't connect no matter what I do.
Any help is greatly appreciated!
Click to expand...
Click to collapse
I experience the same problem with you

bhiga said:
Have you tried using the HDMI extender? That can help a lot in some circumstances. It's amazing how much a TV and other electronics will interfere with WiFi signals.
Click to expand...
Click to collapse
I never had problems with my old router. So I'm pretty sure it to be a compatibility issue.

I have the same exact router (TL-WDR4300 but running dd-wrt) and have zero issues connecting my 2 chromecasts to it.
One chromecast is running PwnedCast and the other is vanilla on the most current update. The router is running both 2.4 and 5 ghz and both chromecasts are connected to the 2.4 bandwidth.
I am using the extender on both.

rozzerhmq said:
I never had problems with my old router. So I'm pretty sure it to be a compatibility issue.
Click to expand...
Click to collapse
Well does the Chromecast Light blink or is it solid?
If it is solid then it is connected to the router and you have some security setting or firewall either on the router or the PC isolating it from other devices.
Typical issue is when you have mis-selected Public for your network type in Windows instead of HOME,
Public isolates the Windows machine where HOME allows Device to Device communication.
Check the firewall settings on your router and try shutting it off and see if that works. If so then turn it back on and look for other settings like Multicast filtering or IGMP and uncheck.
If the light on the CCast is Blinking then it is not connected and you need to re-run the setup.
You say other devices are seeing it so thats probably not the case.

j.a said:
I have the same exact router (TL-WDR4300 but running dd-wrt) and have zero issues connecting my 2 chromecasts to it.
One chromecast is running PwnedCast and the other is vanilla on the most current update. The router is running both 2.4 and 5 ghz and both chromecasts are connected to the 2.4 bandwidth.
I am using the extender on both.
Click to expand...
Click to collapse
Thanks for the info. I am using vendor firmware atm, will try dd-wrt next.

Asphyx said:
Well does the Chromecast Light blink or is it solid?
If it is solid then it is connected to the router and you have some security setting or firewall either on the router or the PC isolating it from other devices.
Typical issue is when you have mis-selected Public for your network type in Windows instead of HOME,
Public isolates the Windows machine where HOME allows Device to Device communication.
Check the firewall settings on your router and try shutting it off and see if that works. If so then turn it back on and look for other settings like Multicast filtering or IGMP and uncheck.
If the light on the CCast is Blinking then it is not connected and you need to re-run the setup.
You say other devices are seeing it so thats probably not the case.
Click to expand...
Click to collapse
Update: It turns out this is not the root cause of this issue(refer to my post below), i will try dd-wrt next!
Thanks for the suggestions!
By following your advise and checking my security settings again. I was able to solve this issue by turning off VPN firewalls. I don't use any VPN thing so i thought the VPN firewalls wouldn't matter. Anyways, thank you very much and now I can enjoy Chromecast again!
However, there is one annoying thing. When casting from Chrome tabs, it won't go into full screen. There are black bars on top and bottom which isn't there if I cast from Youtube. I tried changing all the Chromecast extension options and Tv aspect ratio setting, but had no success. It would be awesome if you can offer some advice.
Thanks again!:good:

rozzerhmq said:
Thanks for the suggestions!
By following your advise and checking my security settings again. I was able to solve this issue by turning off VPN firewalls. I don't use any VPN thing so i thought the VPN firewalls wouldn't matter. Anyways, thank you very much and now I can enjoy Chromecast again!
However, there is one annoying thing. When casting from Chrome tabs, it won't go into full screen. There are black bars on top and bottom which isn't there if I cast from Youtube. I tried changing all the Chromecast extension options and Tv aspect ratio setting, but had no success. It would be awesome if you can offer some advice.
Thanks again!:good:
Click to expand...
Click to collapse
Go into Options of the Googlecast ext on your Browser
Select Full screen zoom and make sure it is enabled.
But there will always be some content that doesn't format the screen properly and will give you black bars...

Asphyx said:
Go into Options of the Googlecast ext on your Browser
Select Full screen zoom and make sure it is enabled.
But there will always be some content that doesn't format the screen properly and will give you black bars...
Click to expand...
Click to collapse
Well, after all, it was too early to call it a success.
So earlier today, I wasn't able to discover Chromecast from my PC(It says something like "device missing" in Chromecast extension). However, my TV shows Chromecast is connected to my network, and the light on Chromecast is stable white. Then, I tried to reboot my router, and that fixed it. This is basically similar to the issues i had in the past where i could just fix Chromecast connection by randomly rebooting router and resetting Chromecast.
I was skeptical and decided to revert my changes on VPN firewalls. After a router reboot, Chromecast still worked!!
At this point, I don't think it's the VPN firewall settings that is causing this issue. This issue looks so random. I would try to go dd-wrt next and hopefully it will fix this issue properly.

rozzerhmq said:
Well, after all, it was too early to call it a success.
So earlier today, I wasn't able to discover Chromecast from my PC(It says something like "device missing" in Chromecast extension). However, my TV shows Chromecast is connected to my network, and the light on Chromecast is stable white. Then, I tried to reboot my router, and that fixed it. This is basically similar to the issues i had in the past where i could just fix Chromecast connection by randomly rebooting router and resetting Chromecast.
I was skeptical and decided to revert my changes on VPN firewalls. After a router reboot, Chromecast still worked!!
At this point, I don't think it's the VPN firewall settings that is causing this issue. This issue looks so random. I would try to go dd-wrt next and hopefully it will fix this issue properly.
Click to expand...
Click to collapse
You mention DD-Wrt are you using that?
Cause I notice most people having these issues seem to be using DD-WRT or Tomato and I'm starting to wonder if perhaps there is some issues with those Custom Firmwares being used.
I do know in the past before I Upgraded my router that I had problems with devices getting booted off the WiFi because I had too many devices connecting and it would seem that when a new device would connect, one would stop getting data despite the fact it said it was connected.
Now this shouldn't ever be the case with WiFi if it has an IP it should not have a limit but I am wondering if your experiencing what I was experiencing before I Upgraded....
Not suggesting you need to upgrade mind you just that what your going through sounds similar to what I went through.
When I bought the new router (LinkSys N900) the Box had this chart of Router Groups and which router was best for X number of devices.
Low end for less than 3, High end for 7+ with the last group being for 7+ and HD.
This chart went against what I believed I knew about WiFi limitations which I thought was only IP and DHCP based...
I wrote it off as pure Marketing with the intention of getting you to buy the most expensive router they had...(which I was going to do anyway LOL)
I'm starting to wonder if maybe there is something to that....Sure would explain my problems with the router that made me upgrade in the first place.

I'm having the same issues with my chromecast and a tp-link wdr4300 router on dd-wrt (latest build from 2014-02).
After either chromecast or router (wi-fi) restart I'm able to cast and chromecast is also shown in chromecast app.
But after some idling (without casting) chromecast is still connected to my wi-fi (ping responses) but I'm not able to cast anything (music, allcast etc..) anymore.
I have already tried enabling/disabling UPNP, changing wi-fi channels, etc
Doesn't look like just a wi-fi issue only, as chromecast is still connected to my wi-fi.
but still could this be related to the Atheros chipset used in the wdr4300 maybe?
Any other routers with atheros chipset running without problems?

Try installing Bonjour Browser or another mDNS browser and monitor what happens in local._googlecast._tcp
Also check router security and firewall logs to see if things are being blocked corresponding to when the mDNS broadcasts fall off.
Sent from a device with no keyboard. Please forgive typos, they may not be my own.

Seems to be good now for my setup.
I had installed a bonjour browser but couldn't see anything special.
local._googlecast._tcp was present all the time even though I couldn't cast.
I have changed the router firmware from dd-wrt (02-19-2014-r23598) to a self compiled OpenWrt (Barrier Breaker r39770).
I have been able to cast now stable for 4 days. Never had that before on dd-wrt.

nervdoc said:
Seems to be good now for my setup.
I had installed a bonjour browser but couldn't see anything special.
local._googlecast._tcp was present all the time even though I couldn't cast.
I have changed the router firmware from dd-wrt (02-19-2014-r23598) to a self compiled OpenWrt (Barrier Breaker r39770).
I have been able to cast now stable for 4 days. Never had that before on dd-wrt.
Click to expand...
Click to collapse
Thanks for the update. Good to know that OpenWRT is working for you.

I have the same router. Don't recall having any issues on stock firmware. I'm on ddwrt now.
Did that as I plan on converting to extender when I move to the AC router soon.
I can only imagine the Chromecast didn't like something in your settings.
Sent from my SPH-L720 using Tapatalk

"Something went wrong. We weren't able to find your chromecast on the network"
[ this trick worked for me ] .. I had the same issue.. I was trying to connect my lcd remote monitor to my windows 7 pc. In the chromecast setup, I was able to go till the page that asked for the wifi network id and pw.., and later i got the error "Something went wrong. We weren't able to find your chromecast on the network" Many tries and all failed. Later i downloaded the chromecast app in my Android 5.0 smart phone and did the settings and voila! .. it got installed in the first try. Later without factory resetting the chromecast, i reinstalled the chromecast setup in my windows 7 and it got installed without any error. Later i opened up the chrome browser installed the chromecast plugin extension and it worked well. I was able to view my page on my remote monitor. Hope it works for u too..

Chromecast connected to wifi but cannot access internet

Hi All
Got my chromecast to connect to the router, it even says "ready to cast".
However, on the TV screen it says: Chromecast connected to wifi but cannot access internet.
My router is a TP-LINK N600 Wireless Dual Band Gigabit Router, Model No. TL-WDR3600
Firmware Version: 3.13.31 Build 130320 Rel.55761n
Hardware Version: WDR3600 v1 00000000
For Wifi the settings are:
Wireless 2.4GHz
Wireless Radio: Enable
Name (SSID): Internet5A_2.4GHz
Mode: 11bgn mixed
Channel: Auto (Current channel 1)
Channel Width: Automatic
WDS Status: Disable
I connect to internet using PPPoE
Router is right behind the TV, where the chromecast is.
AP Isolation is disabled
Any kind of help is greatly appreciated!
I have already gone through troubleshooting, restarting router / chormecast, factory defaults for router / chromecast..etc
Called Google, they had me to it all over again, still the same thing.

joesatri said:
Hi All
Got my chromecast to connect to the router, it even says "ready to cast".
However, on the TV screen it says: Chromecast connected to wifi but cannot access internet.
Click to expand...
Click to collapse
Well first question...Can you stream Media to it? If your using aVia you shouldn't need internet.
Check Router settings make sure you don't have something like Mac Filtering on (although I would think it would not connect at all if that was the case)
Also check to see if you have Internet Access limited for any Mac Addresses.
Make sure UPnP is enabled on the router.
I looked at the router compat chart and all of the TP-Link routers appear to be compatible so if it is therouter it will be some setting you changed from the default.
Also check to see if there is a firmware upgrade for your router.
I should point out though that Google is notorious for lying about Internet access and in many cases use a successful connect to Google Services as the indicator. If thats the case here then it may very well have Internet access but couldn't connect to Google!
We know Google thinks it is the internet but it isn't the entire internet! LOL
Almost forgot...If your router connect via PPPOE make sure to set it to not expire and stay always on.
If you have it set to connect when needed then the CCast may get a No Net access response while the router is connecting.

Can't stream media to it. Tried it with Avia, (chromecast inapp purchased).
Mac filtering not enabled
UPnP is enabled
There is a firmware update that I will try later today and reply with the results.
Thanks for your support!

joesatri said:
Can't stream media to it. Tried it with Avia, (chromecast inapp purchased).
Mac filtering not enabled
UPnP is enabled
There is a firmware update that I will try later today and reply with the results.
Click to expand...
Click to collapse
If the firmware update doesn't fix things, look for additional options related to Multicast, IPv6 and IGMP

joesatri said:
Can't stream media to it. Tried it with Avia, (chromecast inapp purchased).
Mac filtering not enabled
UPnP is enabled
There is a firmware update that I will try later today and reply with the results.
Thanks for your support!
Click to expand...
Click to collapse
Definitely check your PPPOE Settings to make sure it is always on...
If not then you aren't always connected to the Internet and CCast may only check status on initial connection.
Inability to cast at all says to me that something else in your router config is amiss but It's possible that since it can't get to the Net that it can't retrieve the Whitelist which would prevent casting from anything.

Tried all of the above. Still no joy. Updated firmware to latest, etc..
IGMP Proxy: Disabled
This text is just under the IGMP Proxy setting, in RED:
IGMP(Internet Group Management Protocol) works for IPTV multicast stream.
The device supports both IGMP proxy with enabled/disabled option and IGMP snooping.
Enable AP Isolation - Unchecked
IPv6 - disabled
Thinking of giving up on this..

Can you successfully ping Google DNS at 8.8.8.8 from another device connected wirelessly to the same router?

joesatri said:
Tried all of the above. Still no joy. Updated firmware to latest, etc..
IGMP Proxy: Disabled
This text is just under the IGMP Proxy setting, in RED:
IGMP(Internet Group Management Protocol) works for IPTV multicast stream.
The device supports both IGMP proxy with enabled/disabled option and IGMP snooping.
Enable AP Isolation - Unchecked
IPv6 - disabled
Thinking of giving up on this..
Click to expand...
Click to collapse
Try enabling IPv6.

bhiga said:
Try enabling IPv6.
Click to expand...
Click to collapse
Enabled IPv6, but does not show it on router page.
Also, I can ping Google DNS.

joesatri said:
Enabled IPv6, but does not show it on router page.
Also, I can ping Google DNS.
Click to expand...
Click to collapse
Does not show it as in... the router still shows the option as disabled, or something else?
Pretty much all the option types that Google mentions for the various routers in their router known issues page, it's worth trying on and off, if your router supports it, and only if you are having trouble. It's more combinations, but worth a shot.
Otherwise, if it ain't broke, don't fix it.

Thank you all for your help!
I disabled parental control (on ISP side), and it worked!
Sorry for all the trouble!

Thanks for your help. For me it was pppoe set to Connect auto, changed to manual 0 - never disconnect works like a charm. (TP-LINK W9960)

Guys i m having same problem and till not resolved.. my smart tv not work chromcast.. but except it working ok like youtubr and other apps, steam too. only chromecast and wireless displays not work.. for last 5 month i m fightin with xiaomi india..

Can't connect Chromecast to Netflix

I took delivery if a Chromecast today and the setup is a breeze. As I'm in Europe I have changed some settings in order to access the American version of Netflix because if the extended selection of films and series. It runs fine on my Galaxy Note 8, iMac, and Xperia Z1. But it can't run on my TV. Every time I try to cast a film on it I get this error: "Whoops, something went wrong...Device Messaging Error. There was an unrecoverable error on your computer. Please reload the page to resume controlling your device."
I have done some searches and found various possible solutions, but none worked. This is what I've tried:
- Signed out of all devices in Netflix.
- Reset the Chromecast.
- Disabled WWM on the router.
I doubt it's an issue with Netflix as it works fine on all devices except on the TV. Sometimes I do see there is an error on my iMac saying that Microsoft Silverlight has crashed but that doesn't seem to affect anything. Is there anything else I could do to troubleshoot?

slonn said:
I took delivery if a Chromecast today and the setup is a breeze. As I'm in Europe I have changed some settings in order to access the American version of Netflix because if the extended selection of films and series. It runs fine on my Galaxy Note 8, iMac, and Xperia Z1. But it can't run on my TV. Every time I try to cast a film on it I get this error: "Whoops, something went wrong...Device Messaging Error. There was an unrecoverable error on your computer. Please reload the page to resume controlling your device."
Click to expand...
Click to collapse
Please tell us...
What make/model router do you have?
Can you describe how you "changed some settings" to access US Netflix?
Do YouTube and other services work?
If you use your normal DNS settings and access your local Netflix, does it work okay?
Chromecast is its own device and does its own DNS lookups and Internet requests after receiving the "go play this video" request, so if you're redirecting DNS on specific IPs/devices (rather than everything on your network), then you need to be sure the Chromecast IP/device is being redirected.
Otherwise your phone/tablet/computer is in Mens and Chromecast is in the Ladies and...
Phone/tablet/computer: "Excuse me, could you get my phone next to the urinal?"
Chromecast: "What's a urinal??"

bhiga said:
Please tell us...
What make/model router do you have?
Can you describe how you "changed some settings" to access US Netflix?
Do YouTube and other services work?
If you use your normal DNS settings and access your local Netflix, does it work okay?
Chromecast is its own device and does its own DNS lookups and Internet requests after receiving the "go play this video" request, so if you're redirecting DNS on specific IPs/devices (rather than everything on your network), then you need to be sure the Chromecast IP/device is being redirected.
Otherwise your phone/tablet/computer is in Mens and Chromecast is in the Ladies and...
Phone/tablet/computer: "Excuse me, could you get my phone next to the urinal?"
Chromecast: "What's a urinal??"
Click to expand...
Click to collapse
Thanks for your reply.
The router is a Cisco EPC3925.
I used the instructions from the Unblock-us website. Changed the DNS settings to 208.122.23.23 and 208.122.23.22 as instructed. But I also changed the DNS settings to that on the Cisco router - otherwise the US material would not show on my tablet and phone (only on the iMac).
YouTube and Plex work just fine when casting material to the TV.
When using the normal DNS settings from the local Netflix it works fine.

slonn said:
Thanks for your reply.
The router is a Cisco EPC3925.
I used the instructions from the Unblock-us website. Changed the DNS settings to 208.122.23.23 and 208.122.23.22 as instructed. But I also changed the DNS settings to that on the Cisco router - otherwise the US material would not show on my tablet and phone (only on the iMac).
YouTube and Plex work just fine when casting material to the TV.
When using the normal DNS settings from the local Netflix it works fine.
Click to expand...
Click to collapse
Netflix and hulu etc are having issues this morning if you are on a Uverse, if your redirect is a uverse one that may be the issue as well

slonn said:
Thanks for your reply.
The router is a Cisco EPC3925.
I used the instructions from the Unblock-us website. Changed the DNS settings to 208.122.23.23 and 208.122.23.22 as instructed. But I also changed the DNS settings to that on the Cisco router - otherwise the US material would not show on my tablet and phone (only on the iMac).
YouTube and Plex work just fine when casting material to the TV.
When using the normal DNS settings from the local Netflix it works fine.
Click to expand...
Click to collapse
Thanks for the info.
Seems like your core problem is that by default Chromecast uses the Google DNS servers regardless of what DHCP provides, so even though you've set your router so all its DHCP clients are being told to use the Unblock-us DNS, Chromecast still isn't. So all your devices are in the Mens, with the exception of Chromecast, which still goes to the Ladies, even though you tell it go to the Mens, thus it responds with "What's a urinal??" when you reference things in the Mens (US stuff).
Chromecast will fall back to using the DHCP-supplied DNS server(s) only if it doesn't get a response from Google's DNS.
Normally the ways around this would be to:
Route Google DNS requests to a bogus/non-existent gateway
Block Google DNS requests entirely
so Chromecast does not get a response from Google's DNS. Which one works depends on how your router handles the blocking/forwarding. You want a timeout or destination unreachable, rather than an outright refusal.
But... I looked in the manual for your router (seems to be a VoIP+modem+router combo) and unfortunately I couldn't find any way to add a static route, nor did I find a way to block or forward requests specifically for Google DNS.
So unless the ability to add static routes or the ability to block port requests for specific WAN destinations has been added, you may be a bit stuck. Definitely check through your router's config to see though, often times the manual lags far behind the current feature set.
However, if you don't have the necessary options in your router, that leaves you with these possibilities:
Add a router that can provide blocking or redirection via one of
static routes
IP-specific port-blocking
iptables rules
to provide network to Chromecast and devices controlling Chromecast (they need to be on the same subnet).
VPN - which is beyond my area of expertise for this usage.
Get a rooted Chromecast so you can use Eureka-ROM to enable use of DHCP-supplied DNS rather than Google DNS
If you go with option (a), you will have double-NAT, which can be problematic.
You would connect the new (filtering) router's WAN side to your existing router's LAN site. You cannot connect the two routers LAN-LAN as the new router will only filter/redirect traffic when it does the IP translation from LAN to WAN.
If your existing router has a Bridge option for its LAN connection, that would avoid double-NAT (bridge will connect the WAN side to LAN side transparently and disable all router NAT and filtering), but it's more likely that you would get a Static Route option before you get a bridge option.
Anyway, contemplate a bit, first check if there's Static Routes in your router's config. Sorry this has been such a verbose post.

bhiga said:
So unless the ability to add static routes or the ability to block port requests for specific WAN destinations has been added, you may be a bit stuck. Definitely check through your router's config to see though, often times the manual lags far behind the current feature set.
Anyway, contemplate a bit, first check if there's Static Routes in your router's config. Sorry this has been such a verbose post.
Click to expand...
Click to collapse
Many thanks for your detailed reply!!
I don't know much about modems/routers so would be a bit wary of setting up a new router. I checked in the setting on the modem/router provided by my ISP and there is an option to add static ip. Would that be a way to block Google's DNS?

slonn said:
Many thanks for your detailed reply!!
I don't know much about modems/routers so would be a bit wary of setting up a new router. I checked in the setting on the modem/router provided by my ISP and there is an option to add static ip. Would that be a way to block Google's DNS?
Click to expand...
Click to collapse
Unfortunately not - and don't change that - you'll lose Internet connection.
While you're there, though, can tell me what options you have in the Working Mode dropdown where it currently says Router Mode?
DON'T change it though - that's likely to break your Internet connection too.

bhiga said:
While you're there, though, can tell me what options you have in the Working Mode dropdown where it currently says Router Mode?
DON'T change it though - that's likely to break your Internet connection too.
Click to expand...
Click to collapse
There's Router Mode and Bridge Only in the dropdown.

slonn said:
There's Router Mode and Bridge Only in the dropdown.
Click to expand...
Click to collapse
Cool. If you decide to get another router, you should be able to switch that dropdown to Bridge Only and connect your existing router's LAN port to the new router's WAN/Internet port, and it should avoid double-NAT-ing.
Essentially your existing router would only be used as a modem (and VoIP, if you're using VoIP), and you'd disable old router's WiFi and do all your DHCP, WiFi, etc on your new router.

As a rule I try (best I can) to avoid Dual Purpose networking devices as I have found they do neither task very good....
Unfortunately ISPs are moving towards these all in one boxes (Modem/Router/WiFi) and it Wreaks havoc on those who have their own networking gear....
Whats worse is they are locking the configs of these devices so that you can't change them easily to get it to do what you want.

bhiga said:
Cool. If you decide to get another router, you should be able to switch that dropdown to Bridge Only and connect your existing router's LAN port to the new router's WAN/Internet port, and it should avoid double-NAT-ing.
Essentially your existing router would only be used as a modem (and VoIP, if you're using VoIP), and you'd disable old router's WiFi and do all your DHCP, WiFi, etc on your new router.
Click to expand...
Click to collapse
Sounds too simple to be true. I do have an extra router so perhaps I'll test it out at some stage during the week. Thanks for your help so far!

slonn said:
Sounds too simple to be true. I do have an extra router so perhaps I'll test it out at some stage during the week. Thanks for your help so far!
Click to expand...
Click to collapse
You can also try this simple test without the router to see if it works....
Connect your computer directly to the Modem/Router...
Set the Router to Bridge Only mode and if your PC gets an outside (Public) IP Address then you know it will work with an external Router.
The only issue you might face is sometimes if the ISP provided the Modem they program it not to accept that change without it coming from their side.

I connected a new router (ASUS RT-N56U) to the existing router/modem. The existing was set to Bridge Mode with DHCP off and it can connect to the internet but not cast any show (local or US) to the TV. Not sure what details are needed for you to help me getting it to work. I can cast local Netflix onto my phone and tablet. YouTube videos can cast to TV.

slonn said:
I connected a new router (ASUS RT-N56U) to the existing router/modem. The existing was set to Bridge Mode with DHCP off and it can connect to the internet but not cast any show (local or US) to the TV. Not sure what details are needed for you to help me getting it to work. I can cast local Netflix onto my phone and tablet. YouTube videos can cast to TV.
Click to expand...
Click to collapse
Not totally up on the settings screens for your new router but check to see what IP Address it has under the Internet settings.
Every Router has two IP Addresses, one local (192.168.x.x) and one Public (should be provided by the Modem in bridge mode),
If both are local IPs then your double NATing which will easily break Netflix. If one is a Public IP then check other settings in the new router most notably UPnP and Multicast.
Also ( sorry dumb question follows) but you did make sure to set up the CCast to connect to the NEW router not the old one?

Asphyx said:
Not totally up on the settings screens for your new router but check to see what IP Address it has under the Internet settings.
Every Router has two IP Addresses, one local (192.168.x.x) and one Public (should be provided by the Modem in bridge mode),
If both are local IPs then your double NATing which will easily break Netflix. If one is a Public IP then check other settings in the new router most notably UPnP and Multicast.
Also ( sorry dumb question follows) but you did make sure to set up the CCast to connect to the NEW router not the old one?
Click to expand...
Click to collapse
There are two IP addresses: 192.168.1.2, 192.168.1.254, first one local and the other public. I can't locate UPnP and Multicast in the router.
I made sure to set the Chromecast to the new network. The old one shows but it's not connected to the internet. It's in bridge mode.

slonn said:
There are two IP addresses: 192.168.1.2, 192.168.1.254, first one local and the other public. I can't locate UPnP and Multicast in the router.
I made sure to set the Chromecast to the new network. The old one shows but it's not connected to the internet. It's in bridge mode.
Click to expand...
Click to collapse
As I suspected...Your Double NATing is the problem....Your new Router is not actually breaching the Modem to the Internet.
This modem also has WiFi built in I bet....
The DHCP you shut off probably doesn't apply to anything directly plugged into the Modem. Just the WiFi.
You need to look for a setting that gives you the option of passing a local/internal (192.168.x.x) IP or Outside IP and set it to pass an Outside IP. (this is on the Modem BTW)
If the Router reports any IP that starts off 192.168 for Public then you are not set up correctly.
If you see the option to change from local IP to Outside IP but it is greyed out then your ISP locked it out and they must make the changes on their end.
Call and tell them your Modem is in Bridge mode but doing double NAT translation and you can't breach the Modem with your router.

slonn said:
There are two IP addresses: 192.168.1.2, 192.168.1.254, first one local and the other public. I can't locate UPnP and Multicast in the router.
I made sure to set the Chromecast to the new network. The old one shows but it's not connected to the internet. It's in bridge mode.
Click to expand...
Click to collapse
As @Asphyx said, there's double-NAT going on. This may be a problem, but the core problem at the moment is that new router's WAN and LAN are using the same subnet.
I recommend...
Turn off the WiFi on your old router, if you can.
Look for the stuff Asphyx mentioned.
If you get stuck, call your ISP
Ask them to enable Bridge mode and explain that you're looking for more robust routing and firewall features
Ask if there's a firmware update for your existing modem/router combo to provide this, if there is a different ISP-provided modem/router you can use that has better features, or if they can provide/recommend a modem-only device (if they don't/can't enable Bridge mode)
Ideally, you want to see is your new router getting a WAN address that is not 192.168.x.x
If you reach that point, you're done.
If not, you at least want your new router getting a WAN address that is in a different subnet from its local network.
On your new router, change the Local address to 192.168.2.2
That will switch things on the new router to the 192.168.2.x subnet. Now the new router and old router will be on different subnets.
Make sure any client devices (wired or wireless) that have static IPs set are changed to use IP 192.168.2.something and gateway 192.168.2.2
My network is double-NAT and I have not had issues with Chromecast, streaming, VPN, or anything else, but you definitely should avoid double-NAT whenever possible.

Comcast Moden Connection

Cant get chromecast to connect to comcast modem DCP 3939 https://support.google.com/chromecast/answer/3438461 cant find these settings is there a fix or work around

My guess is that your have the modem/router from Comcast. I've learned that you need your own router as I spent weeks looks for a workaround for my in-laws.
Comcast blamed Google, which made me laugh when I connected the Chromecast on my own network and it worked. From my research, Comcast did an update to the modem/router that essentially caused the problem.
If anyone has found the solution, please share!
Sent from my Nexus 6 using Tapatalk

I have one of the comcast routers that was installed with my X1 box. Per the router info it's a Cisco Model DPC3939. It supports both 2.4 and 5 GHz.
Make sure you are connecting to the 2.4 GHz not the 5GHz (Chromecast help page says 5GHz is unsupported).
I tried rebooting router then chromecast, that didn't work.
I tried adding the mac address manually to the router and was still having trouble (router saw the chromecast as connected but during chromecast initializiation it couldn't connect to the newtork).
What finally fixed it for me was fiddling with the UPnP settings then rebooting the chromecast after. You can get to the UPnP settings by logging into the router, then:
Advanced > Device Discovery
These are the setting I have, that worked:
UPnP: Enable
Advertisement Period: 5 minutes (default is 30)
TTL: 10 hops (default is 5)
Zero Config: Enable (default is disable)
After saving those settings I then restarted the chromecast and went through the connection initialization on the chromecast app and it now connects / works
It also worked for me

Comcast has 15 types of modems, when did you get it, what does it look like?
Does the name of your WiFi have a space in it?

Just my advice...
But anyone using an ISP provided device that has it's own WiFi is using a router and should go out and buy your own then have their ISP put that device into Bridge mode.
You will have a much easier time with getting streaming and other servers to work and you will have complete control over your home network....
As opposed to someone who lives 100's or 1000's of miles away who may or may not speak your language!