Server detection
Gfire (SVN) has a server detection feature, comparable to Xfire's server detection. This feature isn't implemented for Windows yet. Some steps have to be achieved in order to get it working, who should be done automatically for the next release when configuring the Gfire package.
First step: enable server detection in Gfire
As server detection is still in alpha stage, it isn't enabled by default. It can be enabled by checking the options "Use server detection" in Pidgin under the account properties.
Last step: enable server detection on GNU/Linux
As the command that is used for server detection requires root privileges to work, the program must be allowed to be run as root for normal users. This can be a potential security failure, so do it at your own risk, even if there are almost no chance it might do evil things.
This can be performed either graphically or using the chmod command.
Graphical way
Simply start your file manager as root, locate the tcpdump executable (located in /usr/sbin) and change the properties like this:
Using the chmod command
Simply run this as root:
su chmod u+s /usr/sbin/tcpdump
Or this for Ubuntu users:
sudo chmod u+s /usr/sbin/tcpdump