Forums Connection Issues DCC CHAT times out due to firewall

Hi,

When establishing a DCC CHAT connection without my firewall activated, the connection remains stable until I close it.

But when my firewall is on duty, the connection times out after a while, usually between 25 to 55 minutes.

I am using F-Secure Internet security.

Anyone has a clue as to why such connection would time out?

Tx in advance