Our firewall was configured as per Google’s documentation to allow the Google Hangouts nee Talk client and the Android Google Hangouts app to connect. but to no avail.
With a little bit of troubleshooting I found that an additional port needed to be opened too. So here’s the firewall ports you need to open for Google Talk:
- 80 TCP
- 443 TCP
- 19302 – 19309 TCP and UDP
- Additional Ports for various clients
Ports Clients 5222, 5223, 5224 XMPP clients 5228 and 5229 Android phones 5269 XMPP federation
This information was taken from Optimize your network for Hangouts
I hope that helps some of you out there.