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Error: ip6tables command [/sbin/ip6tables -v -I OUTPUT -p tcp --dport 25 -m owner --uid-owner 0 -j ACCEPT] failed, you appear to be missing a required ip6tables module, at line 554
ip6tables: No chain/target/match by that name.

Can anybody please help me out?
I get this after I restart CSF from Webmin using medium security configuration.
Thanks in advance,


--Indulgentu

That suggests you are missing the required ip6tables owner module in the kernel you are running. You need to either resolve that issue,or disable the SMTP_BLOCK option in csf.

yum install iptables-ipv6 -y