Dear all, I am not familiar with firewall stuff. Currently, I update my kernel from 2.6.10 (Fedora Core 2) to 2.6.13.3. I find iptable fail to start. After tracing for while, the error are happened at the following line: -A RH-Firewall-1-INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT I don't know if I have missed any component in kernel and I don't have enough information why it fails. Please help. Thanks. Yours, Jacky