Hello I'm having problems with dst cache overlow freezing my firewall. Environment: - Dell PowerEdge 750, two integrated Intel e1000 ports, acting as firewall - I had FC2, now using FC3, with 2.6.9-1.681_FC3 kernel - I had Dlink quad port ethernet card with sundance driver, now using quad port Intel e1000 card with e1000 driver - 10Mbit/s internet connection with ~500 users behind the firewall, using iptables for nat. Problem: Sometimes (couple times in a month) network freezes and I get the following errors in /var/log/messages: ... Jan 10 21:13:05 testfw kernel: dst cache overflow Jan 10 21:13:05 testfw kernel: dst cache overflow Jan 10 21:20:50 testfw kernel: dst cache overflow Jan 10 21:20:50 testfw kernel: dst cache overflow Jan 10 21:20:50 testfw kernel: dst cache overflow ... Only reboot helps. I guess it's something nat/connection tracking related? I have checked out the number of lines in /proc/net/ip_conntrack during the freezes, last time there were 241 lines (wc -l /proc/net/ip_conntrack). Is there anything that I could do to prevent this? Is this a known bug or should I file a bug report to the bugzilla? Regards Kimmo Koivisto
