I am trying to block ALL traffic except when from ports 9100,22,23 to destination network 192.0.0.0 (my WAN): 2 networks 192.0.3.0 with static route to 192.0.0.0
Shouldn't this work?:
iptables -A INPUT -p tcp -d 192.0.0.0/24 --dport 22 -j ACCEPT
iptables -A INPUT -p tcp -d 192.0.0.0/24 --dport 23 -j ACCEPT
iptables -A INPUT -p tcp -d 192.0.0.0/24 --dport 9100 -j ACCEPT
iptables -A INPUT -d 192.0.0.0/24 -j DROP
I tried it but it blocked everything on my router and cut off internet access.
Should I but the "DROP" line before the "ACCEPT" lines?