583 B
583 B
Iptables.
Allow ssh traffic.
iptables -A INPUT -p tcp --dport=22 -j ACCEPT
# -A Append (End table) | -I Insert (Start table).
# -p Protocol.
# -j Action.
Allow localhost traffic.
iptables -A INPUT -i lo -j ACCEPT
# -i Interface name.
Allow ping.
iptables -A INPUT -p icmp -j ACCEPT
Warning!!!.
iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
Input policy drop.
iptables -P INPUT DROP
Save/Restore rules from file.
iptables-save > ./filename.rules
# iptables-restore < ./filename.rules