Hello,
can you tell me, please, what distribution are you using on HN? For me (centos 4.4), the rule generated by your `system-config-securitylevel` doesn't work:
[root@white ~]# CentOS release 4.4 (Final)
[root@white ~]# iptables -A RH-Firewall-1-INPUT -m STATE --state NEW -m tcp -p tcp --dport 22 -j ACCEPT
iptables v1.2.11: Couldn't load match `STATE':/lib64/iptables/libipt_STATE.so: cannot open shared object file: No such file or directory
Try `iptables -h' or 'iptables --help' for more information.
Thank you,
Vasily.