Getting notification error self signed certificate in certificate chain while using proxy

[Srijan67]

Hi @rixcian,
I am getting error "error self signed certificate in certificate chain while using proxy" while registrying fcm service in my app in a environment where it has a mitm(Man in the Middle) proxy on their network layer which filters UI.
I have added exception for *.googleapis.com and android.clients.google.com urls to bypass proxy but i am still getting the same error.
Am I missing something to add in exception ?
Thanks for your great work,

[rixcian]

Hi,
try excluding the following Firebase and Google domains from the proxy:

• *.googleapis.com
• *.gstatic.com
• fcm.googleapis.com
• firebaseinstallations.googleapis.com
• mtalk.google.com

Alternatively, you can install the proxy’s root certificate on the device to make it trusted. This might eliminate the need to exclude any domains from the proxy.

[Srijan67]

Proxy Root CA Cert is already installed in trusted cert store but still I am getting this error. So, I thought that it might need its own certificate like some mutual tls and other ssl pinned apps. But the above exception that I mentioned isn't working either.
Looks like only two links (mtalk.google.com, *.gstatic.com) from the link that u provided aren't there in my case.
Also can u confirm if I have to allow any ports as well or just adding the link would work?

[rixcian]

The library is communicating with the Google FCM API only via 443 port.

[Srijan67]

can you tell me any way to reset fcm token which got generated as it looks like if its successfully generated once. i can't see any api calls then due to which i am unable to replicate the issue.