# Mattermost-push-proxy is not working **URL:** \ **Category:** Troubleshooting\ **Created:** [August 29, 2020, 2:25am UTC](https://forum.mattermost.com/t/mattermost-push-proxy-is-not-working/10350 "2020-08-29T02:25:42Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![ernesto](https://avatars.discourse-cdn.com/v4/letter/e/c2a13f/32.png) [@ernesto](https://forum.mattermost.com/u/ernesto)\ **Post date:** [August 29, 2020, 2:25am UTC](https://forum.mattermost.com/t/mattermost-push-proxy-is-not-working/10350/1 "2020-08-29T02:25:42Z")
Hi, I have the last stable version of mattermost installed in a test server, all was working very well until yesterday, suddenly my team lose connection. Today mattermost was complete stopped, doing a review I could see that push notifications never go out of the server, the [http://push-test.mattermost.com](http://push-test.mattermost.com) server never response, then I installed mattermost-push-proxy I have this error all-time: ERR: 2020/08/29 01:57:55 logger.go:80: Android response failure: &{6675678001648401474 0 1 0 [{ mismatched sender id}] 0 } type=android\_rn I have the correct keys in android and android\_rn, but I don’t fpund where configure the “sender id”. ![Screenshot_20200828_212334](https://us1.discourse-cdn.com/flex020/uploads/mattermost/original/2X/9/95583cb5475ea494dbf470bc81756d20db8c6717.png) I tested the proxy using curl and I have the same message. ---
**Author:** ![andrew.bimba](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mattermost.com/andrew.bimba/32/4064_2.png) [@andrew.bimba](https://forum.mattermost.com/u/andrew.bimba)\ **Post date:** [August 31, 2020, 3:56am UTC](https://forum.mattermost.com/t/mattermost-push-proxy-is-not-working/10350/2 "2020-08-31T03:56:25Z")
Hi @ernesto, Could you look at the guide for installing the _Push Notification Service_ and integrating with _Mattermost_, if there are any steps you missed [https://developers.mattermost.com/contribute/mobile/push-notifications/service/](https://developers.mattermost.com/contribute/mobile/push-notifications/service/). Secondly, you could look into this discussion [[SOLVED] Mattermost-push-proxy - Readme Instructions incomplete?](https://forum.mattermost.com/t/solved-mattermost-push-proxy-readme-instructions-incomplete/4220/5) for a further guide. ---
**Author:** ![ernesto](https://avatars.discourse-cdn.com/v4/letter/e/c2a13f/32.png) [@ernesto](https://forum.mattermost.com/u/ernesto)\ **Post date:** [August 31, 2020, 4:10pm UTC](https://forum.mattermost.com/t/mattermost-push-proxy-is-not-working/10350/3 "2020-08-31T16:10:13Z")
Hi Andrew, offcourse I read the guide and followed all the steps. I was reading the second link, but is not my problem, the services is working good (it’s UP) , the problem is this message: > INFO: 2020/08/31 15:21:54 logger.go:62: Sending android push notification for device=android\_rn and type=clear > ERR: 2020/08/31 15:21:54 logger.go:80: Android response failure: &{4106208683457487325 0 1 0 [{ mismatched sender id}] 0 } type=android\_rn It’s clear, I need send a “sender id”. ---
**Author:** ![andrew.bimba](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mattermost.com/andrew.bimba/32/4064_2.png) [@andrew.bimba](https://forum.mattermost.com/u/andrew.bimba)\ **Post date:** [September 1, 2020, 5:44am UTC](https://forum.mattermost.com/t/mattermost-push-proxy-is-not-working/10350/4 "2020-09-01T05:44:01Z")
Hi Ernesto, I requested you go through the links because of your statement _“Today mattermost was complete stopped…”_ which implied the service is not up. Thanks for the clarification. Could you check if the _Mattermost Server_ that you are running on has a firewall that blocks connection to the default `https://push.mattermost.com` (US) and `https://hpns-de.mattermost.com/` (Germany) listed in the [documentation](https://docs.mattermost.com/mobile/mobile-hpns.html)? ---
**Author:** ![ernesto](https://avatars.discourse-cdn.com/v4/letter/e/c2a13f/32.png) [@ernesto](https://forum.mattermost.com/u/ernesto)\ **Post date:** [September 1, 2020, 7:26am UTC](https://forum.mattermost.com/t/mattermost-push-proxy-is-not-working/10350/5 "2020-09-01T07:26:21Z")
Hi Andrew, the server is without firewall, but, this is not the problem. I want to use mattermost-push-proxy, then, Google is answer me that I need a “sender id”. ---
**Author:** ![nikolay.rastegaev](https://avatars.discourse-cdn.com/v4/letter/n/7ea924/32.png) [@nikolay.rastegaev](https://forum.mattermost.com/u/nikolay.rastegaev)\ **Post date:** [February 12, 2021, 1:53pm UTC](https://forum.mattermost.com/t/mattermost-push-proxy-is-not-working/10350/6 "2021-02-12T13:53:25Z")
Hi Ernesto! Did you decide this problem? I have the same and cannot find decision((