Someone mentioned a similar item a week ago and I performed a number of checks on the server.
1) Port Scan
- Wanted to see any open ports on the server to see if there was anything sending out network traffic
2) Checked Patches/Security Updates
- All files on the server were up to date
3) Virus scanning
- Scanned the server with Norton, McAfee (hate it!), and a few specific scanners just to be safe, nothing came up
4) Software updates
- I updated the software being used on the server which is VERY limited
If you can get me a sample of your firewall log to show me what ports and type of traffic you're getting I can hit it again. The only thing I can think of is the constant validation and protection software running IN the chat itself (once you're connected). It's setup with anti-spoofing as well as a number of security agents there to maintain security in the chat server.
Again, everything I did was preventive as nothing was found on that server, which does not get much use.
(Chat server is on its own Stand alone server.)