Če se hočete zaščititi pred “brute force” napadi na ssh, v Mikrotik vpišite naslednje vrstice v polje /ip firewall filter
add chain=input protocol=tcp dst-port=22 src-address-list=ssh_blacklist action=drop \ comment="drop ssh brute forcers" disabled=no add chain=input protocol=tcp dst-port=22 connection-state=new \ src-address-list=ssh_stage3 action=add-src-to-address-list address-list=ssh_blacklist \ address-list-timeout=10d comment="" disabled=no add chain=input protocol=tcp dst-port=22 connection-state=new \ src-address-list=ssh_stage2 action=add-src-to-address-list address-list=ssh_stage3 \ address-list-timeout=1m comment="" disabled=no add chain=input protocol=tcp dst-port=22 connection-state=new src-address-list=ssh_stage1 \ action=add-src-to-address-list address-list=ssh_stage2 address-list-timeout=1m comment="" disabled=no add chain=input protocol=tcp dst-port=22 connection-state=new action=add-src-to-address-list \ address-list=ssh_stage1 address-list-timeout=1m comment="" disabled=no
Če bi hoteli blokirati še downstream, potem dodajte še naslednji ukaz:
add chain=forward protocol=tcp dst-port=22 src-address-list=ssh_blacklist action=drop \ comment="drop ssh brute downstream" disabled=no
Ogled vseh blokiranih IP naslovov si lahko ogledate tako, da vtipkate”/ip firewall address-list” in nato “print“.
