> I just installed the latest kernel 2.6.32-573.8.1.el6.x86_64 and when > I rebooted it shorewall (shorewall-4.5.4-1.el6.noarch) failed with the > following error > > ERROR: a non-empty masq file requires NAT in your kernel and iptables > /etc/shorewall/masq (line 15) FYI I have the same kernel (2.6.32-573.8.1.el6.x86_64) and shorewall (shorewall-4.5.4-1.el6.noarch) versions and non-empty /etc/shorewall/masq here and do not see this problem. Try as root: service shorewall restart.