iptables: Allow Specific IP to Connect via SSH.

calendar2019-09-28 · 1 min read · firewall iptables specific-ip ssh  ·
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1iptables -A INPUT -p tcp -s 114.191.33.88 --dport 22 -m conntrack --ctstate NEW,ESTABLISHED -j ACCEPT
2iptables -A OUTPUT -p tcp --sport 22 -m conntrack --ctstate ESTABLISHED -j ACCEPT