# These rules are applied as the default firewall when there are no state rules to be applied. *filter :INPUT DROP [0:0] :FORWARD DROP [0:0] :OUTPUT ACCEPT [0:0] :sshguard - [0:0] -A INPUT -m conntrack --ctstate INVALID -j DROP -A INPUT -i lo -j ACCEPT -A INPUT -s 10.254.0.0/24 -i eth1 -j ACCEPT -A INPUT -s 5.101.171.208/28 -i eth0 -j ACCEPT -A INPUT -s 172.236.16.105/32 -i eth0 -j ACCEPT -A INPUT -s 185.176.90.169/32 -i eth0 -j ACCEPT -A INPUT -s 145.40.182.204/32 -i eth0 -j ACCEPT -A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT -A INPUT -p icmp -m icmp --icmp-type 8 -j ACCEPT -A INPUT -p icmp -m icmp --icmp-type 0 -j ACCEPT -A INPUT -p icmp -m icmp --icmp-type 3 -j ACCEPT -A INPUT -p icmp -m icmp --icmp-type 11 -j ACCEPT -A INPUT -p icmp -m icmp --icmp-type 12 -j ACCEPT -A INPUT -j sshguard -A INPUT -p tcp -m multiport --dports 22,25422 -m conntrack --ctstate NEW -j ACCEPT -A INPUT -p tcp -m tcp --dport 873 -m conntrack --ctstate NEW -j ACCEPT -A INPUT -p tcp -m tcp --dport 25443 -m conntrack --ctstate NEW -j ACCEPT COMMIT