I'm using a REDHAT 9.0 to be a NAT server. after few days I found the system is going to eat all of it's memory I count /proc/net/ip_conntrack only have 10000 lines and i have 2GB mem. it seems that the box will continue to eat as much mem as I have . how to free those memory ? what's wrong with my box ? thanks in advancd ____________________________ cat /proc/sys/net/ipv4/netfilter/ip_conntrack_max 65536