Editing Jail Server Install (section)

=== firewall ===
add an outside blocking rule to the firewall, so this machine can only be reached from inside the firewall. Follow example already in firewall jail17 is:
 
 00117 allow ip from { 69.55.230.2 or 69.55.230.10 or 69.55.225.225 or 69.55.238.150 } to 69.55.228.200
 00117 deny ip from any to 69.55.228.200

jail19 would be 00119...
 ipfw add 00109 allow ip from { 69.55.230.2 or 69.55.230.10 or 69.55.225.225 } to 69.55.232.3
 ipfw add 00109 deny ip from any to 69.55.232.3