I am trying to utilize NessusClient 3.2.1.1 to scan a firewall looking for open ports. What is the best way to do this? I have packet captures where the it only hits 28 or so TCP ports (no UDP). Anyone else tried to run this? I have tried utilizing NMAP (nmap -PN -sS -sU -v x.y.z.0-255), but it is taking a long time to finish.
Thanks
Thanks