Tak jsem zadal ten příkaz, ale z výstupu nejsem nijak chytrý:

Chain INPUT (policy DROP 0 packets, 0 bytes)
pkts bytes target     prot opt in     out     source               destination         
 0     0 ACCEPT     all  --  lo     *       0.0.0.0/0            0.0.0.0/0           
 0     0 ACCEPT     all  --  *      *       0.0.0.0/0            0.0.0.0/0           state ESTABLISHED 
 0     0 ACCEPT     icmp --  *      *       0.0.0.0/0            0.0.0.0/0           state RELATED 
27  4393 input_ext  all  --  eth0   *       0.0.0.0/0            0.0.0.0/0           
 0     0 input_ext  all  --  pan0   *       0.0.0.0/0            0.0.0.0/0           
 0     0 input_ext  all  --  *      *       0.0.0.0/0            0.0.0.0/0           
 0     0 LOG        all  --  *      *       0.0.0.0/0            0.0.0.0/0           limit: avg 3/min burst 5 LOG flags 6 level 4 prefix `SFW2-IN-ILL-TARGET ' 
 0     0 DROP       all  --  *      *       0.0.0.0/0            0.0.0.0/0