Firewalk

Firewalk

We are now attempting to use Firewalk to establish the policy on
gateway gw.target.com with regards to the host host.target.com on key
services such as ftp, telnet and mail.
First Firewalk establishes the distance to the gateway


root@anon [~] $ ./firewalk -pTCP -S20-26 gw.target.com
host.target.com
probe: 1 TTL: 1 port 34420: expired from [gw.attack.com]
probe: 2 TTL: 2 port 34420: expired from [gw.isp.com]
probe: 3 TTL: 3 port 34420: expired from [gw.target.com]
probe: 4 TTL: 4 port 34420: Bound scan at 4 hops [gw.target.com]


port 20: *
port 21: open
port 22: open
port 23: *
port 24: *
port 25: open
port 26: *