iptables-legacy -A INPUT -p tcp -s localhost --dport 3000 -j ACCEPT iptables-legacy -A INPUT -p tcp --dport 3000 -j DROP
this works for me
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iptables-legacy -A INPUT -p tcp -s localhost --dport 3000 -j ACCEPT
iptables-legacy -A INPUT -p tcp --dport 3000 -j DROP
this works for me