timeouts through a firewall?

Hi All We are seeing the following error: Error: rlm_ldap: ldap_search() failed: Timed out while waiting for server to respond. Please increase the timeout. Our radius server talks to our LDAP server through a firewall. I'm wondering if this has to do with the session lifetime setting on the firewall? If there are no authentications taking place (we're in testing mode, and it was at least 2-3 hours between client authentications), then I guess this connection/session could be timed out by the firewall? I just want to know if that makes sense before approaching the firewall guys and asking to increase the timeout. Thanks Matt mda@unb.ca