Google Talk and NAT issue ?

[Yuan Jue]

Hi, all.

These days I am bothered by a problem. 

Since I am now surfing the Internet through NAT, I cannot use kopete
(an IM client for KDE) to connect google talk server any more.
 While at the same time I still can use Google Talk client under Windows 
to connect to the server, without any additional configuration.

Could anyone please explain this to me? Why can I use Google Talk client
straightly but not kopete? What kind of new technology Google use to
overcome a NAT issue?

Any ideas would be appreciated. Thanks in advance.

-- 
Best Regards
Yuan Jue @ www.yuanjue.net