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- packets with connection-state=established,related added to FastTrack for faster data throughput, firewall will work with new connections only;
- drop invalid connection and log them with prefix "invalid";
- drop attempts to reach not public addresses from your local network, apply address-list=not_in_internet before, bridge1 "bridge" is local network interface, log=yes attempts with prefix "!public_from_LAN";
- drop incoming packets that are not NAT`ed, ether1 is public interface, log attempts with "!NAT" prefix;
- jump to ICMP chain to drop unwanted ICMP messages
- drop incoming packets from the Internet, which are not public IP addresses, ether1 is a public interface, log attempts with prefix "!public";
- drop packets from LAN that does not have LAN IP, 192.168.88.0/24 is local network used subnet;
| Code Block | ||
|---|---|---|
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/ip firewall filter add action=fasttrack-connection chain=forward comment=FastTrack connection-state=established,related add action=accept chain=forward comment="Established, Related" connection-state=established,related add action=drop chain=forward comment="Drop invalid" connection-state=invalid log=yes log-prefix=invalid add action=drop chain=forward comment="Drop tries to reach not public addresses from LAN" dst-address-list=not_in_internet in-interface=bridge1bridge log=yes log-prefix=!public_from_LAN out-interface=!bridge1 bridge add action=drop chain=forward comment="Drop incoming packets that are not NAT`ted" connection-nat-state=!dstnat connection-state=new in-interface=ether1 log=yes log-prefix=!NAT add action=jump chain=forward protocol=icmp jump-target=icmp comment="jump to ICMP filters" add action=drop chain=forward comment="Drop incoming from internet which is not public IP" in-interface=ether1 log=yes log-prefix=!public src-address-list=not_in_internet add action=drop chain=forward comment="Drop packets from LAN that do not have LAN IP" in-interface=bridge1bridge log=yes log-prefix=LAN_!LAN src-address=!192.168.88.0/24 |
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