# Local setup: WebRTC + firefox - ICE failed, add a STUN server and see about:webrtc for more details **URL:** \ **Category:** Wowza Streaming Engine\ **Created:** [October 4, 2017, 11:55pm UTC](https://community.wowza.com/t/local-setup-webrtc-firefox-ice-failed-add-a-stun-server-and-see-about-webrtc-for-more-details/49847 "2017-10-04T23:55:47Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![Jaimee\_Blackwood](https://avatars.discourse-cdn.com/v4/letter/j/9f8e36/32.png) [@Jaimee\_Blackwood](https://community.wowza.com/u/Jaimee_Blackwood)\ **Post date:** [October 4, 2017, 11:55pm UTC](https://community.wowza.com/t/local-setup-webrtc-firefox-ice-failed-add-a-stun-server-and-see-about-webrtc-for-more-details/49847/1 "2017-10-04T23:55:47Z")
I have locally set up Wowza Streaming Engine with WebRTC as outlined in this doc. I am using - Wowza Streaming Engine 4 Subscription Edition 4.7.0 build20186 - A self signed cert I am ingesting a h264 stream from an IP camera and transcoding it to VP8. I have hosted the HTML examples on Wowza Streaming Engine as outlined in the how-to doc. When using chrome, if I go to ```auto https://127.0.0.1:9443/webrtc/play/index.html ``` And enter the following ```auto SDP URL: wss://127.0.0.1:443/webrtc-session.json Application Name: webrtcStream Name: mystream.stream_vp8 ``` The player connects and begins to stream. This works great. However, the exact same set up with the same input in Firefox gives the error: ```auto ICE failed, add a STUN server and see about:webrtc for more details ``` The contents of about:webrtc are foreign to me, so I’m not sure how to effectively debug this. [Here is a screenshot of the attempt](https://i.imgur.com/e7BCg0O.png) Many similar-sounding issues I have found in previous answers mentioned the **webrtcIceCandidateIpAddresses** and **webrtcUDPBindAddress** properties that are added to **conf/Application.xml** - I’ve attempted some trial and error here to no avail. These are the values I’m currently sitting with in my Applcation.xml ```auto webrtcIceCandidateIpAddresses 127.0.0.1,udp String webrtcUDPBindAddress 0.0.0.0 String ``` Any push in the right direction would be greatly appreciated. Thank you. ---
**Author:** ![Balazs\_Sipocz](https://avatars.discourse-cdn.com/v4/letter/b/df705f/32.png) [@Balazs\_Sipocz](https://community.wowza.com/u/Balazs_Sipocz)\ **Post date:** [November 14, 2017, 8:10pm UTC](https://community.wowza.com/t/local-setup-webrtc-firefox-ice-failed-add-a-stun-server-and-see-about-webrtc-for-more-details/49847/2 "2017-11-14T20:10:48Z")
Hey, Was anyone able to figure this out? Thanks in advance! ---
**Author:** ![Jaimee\_Blackwood](https://avatars.discourse-cdn.com/v4/letter/j/9f8e36/32.png) [@Jaimee\_Blackwood](https://community.wowza.com/u/Jaimee_Blackwood)\ **Post date:** [November 14, 2017, 8:14pm UTC](https://community.wowza.com/t/local-setup-webrtc-firefox-ice-failed-add-a-stun-server-and-see-about-webrtc-for-more-details/49847/3 "2017-11-14T20:14:21Z")
A bit embarrassed to say but I had placed my configs shown above in the wrong Application.xml - Once I spotted that it worked perfectly. Hopefully another careful look over the set up steps will reveal something you’ve slipped on. ---
**Author:** ![Jaimee\_Blackwood](https://avatars.discourse-cdn.com/v4/letter/j/9f8e36/32.png) [@Jaimee\_Blackwood](https://community.wowza.com/u/Jaimee_Blackwood)\ **Post date:** [June 12, 2018, 5:31pm UTC](https://community.wowza.com/t/local-setup-webrtc-firefox-ice-failed-add-a-stun-server-and-see-about-webrtc-for-more-details/49847/4 "2018-06-12T17:31:29Z")
Have you had any success solving this? I had thought I had resolved this, but it was only working within a dev environment. Once pushed to an external server, I’m seeing it again. Wondering if you have any insight. ---
**Author:** ![premsai\_kp](https://avatars.discourse-cdn.com/v4/letter/p/d6d6ee/32.png) [@premsai\_kp](https://community.wowza.com/u/premsai_kp)\ **Post date:** [December 10, 2018, 1:59pm UTC](https://community.wowza.com/t/local-setup-webrtc-firefox-ice-failed-add-a-stun-server-and-see-about-webrtc-for-more-details/49847/5 "2018-12-10T13:59:03Z")
anyone able to find solution for this? ---
**Author:** ![Emma-Louise\_Leavey](https://avatars.discourse-cdn.com/v4/letter/e/41988e/32.png) [@Emma-Louise\_Leavey](https://community.wowza.com/u/Emma-Louise_Leavey)\ **Post date:** [December 15, 2020, 6:57am UTC](https://community.wowza.com/t/local-setup-webrtc-firefox-ice-failed-add-a-stun-server-and-see-about-webrtc-for-more-details/49847/6 "2020-12-15T06:57:06Z")
2 years later…anyone find a solution yet? ---
**Author:** ![Emma-Louise\_Leavey](https://avatars.discourse-cdn.com/v4/letter/e/41988e/32.png) [@Emma-Louise\_Leavey](https://community.wowza.com/u/Emma-Louise_Leavey)\ **Post date:** [December 15, 2020, 7:15am UTC](https://community.wowza.com/t/local-setup-webrtc-firefox-ice-failed-add-a-stun-server-and-see-about-webrtc-for-more-details/49847/7 "2020-12-15T07:15:34Z")
I was able to find something that worked, per [WebRTC demo page and Firefox](http://community.wowza.com/t/webrtc-demo-page-and-firefox/92337/8) It only worked for me if UDP is the _only_ ICE candidate. I had to remove TCP completely. Even if UDP is the priority, it didn’t work.