iptables-1.2.11-3.1.RHEL4.i386.rpm appears to be missing the addrtype module. That or I've gone senile. > iptables -m addrtype --dst-type BROADCAST -j DROP iptables v1.2.11: Couldn't load match `addrtype':/lib/iptables/libipt_addrtype.so: cannot open shared object file: No such file or directory > iptables -ql iptables | grep addrtype >