Hi Anzulo, I can't reproduce the output you show using this basic rule.
iptables -A INPUT -i lo -j ACCEPT iptables -L -nv Chain INPUT (policy ACCEPT 0 packets, 0 bytes) pkts bytes target prot opt in out source destination 0 0 ACCEPT all -- lo * 0.0.0.0/0 0.0.0.0/0 ... ip6tables -A INPUT -i lo -j ACCEPT ip6tables -L -nv Chain INPUT (policy ACCEPT 0 packets, 0 bytes) pkts bytes target prot opt in out source destination 0 0 ACCEPT all lo * ::/0 ::/0 ... Default source and destination addresses (not ports) are defined using both iptables and ip6tables instead you set a specific one in the rule and AFAIK this is the expected behaviour in iptables. Can you please provide more information or try to reproduce this issue in another machine? Regards, Alberto