The official Google talk client works beautifully behind firewall and proxy , but Linux users face difficulties trying to connect behind a proxy and firewall. Google Talk client is not available for Linux. A page describing how to connect using other Instant Messengers (IM) is provided on the Google Talk page, but the details shown there are for standard setup.
Google talk uses an open standard named Jabber for communication between the user-client and the server. This protocol Allows connecting in 3 modes: Direct connection, tunneling over HTTP and HTTP polling.
The HTTP Tunneling mode can be used when the proxy allows HTTP tunneling over Jabber ports 5222 and 5223. Most of the proxies block this.
Recently is has become possible to connect to GTalk Jabber server using port 443. for more details, refer this page Thus, for people behind firewall and proxy, the parameters of connections are as follows.:
Try a good jabber client, e.g. Psi
Jabber ID: your.user.id@gmail.com
Password: gmail password
Proxy server name, port and password from your network administrator
Also select following options
Use SSL Encryption
Ignore SSL Warnings
Allow Plaintext Login
Manually specify server host/port; Host: talk.google.com; Port: 443
Save the setup and try luck!
Also, have a look at the page describing how to use Google Talk with other IM services like AIM, MSN, Yahoo, ICQ etc.
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