This weekend, I set up pfSense on a spare box that I had sitting in the garage. It seems cool and powerful, but I haven't messed with it much yet.
Was doing some basic nmap scanning from work against my home public IP, and the nmap scan is apparently saying I'm running DD-WRT? My only other router (wireless) is sitting behind the pfSense box and it is running stock firmware, not DD-WRT. Can anyone help to explain this output? Perhaps it's just an erroneous guess as the output suggests it may not be accurate? Thank you.
root@kali:~# nmap -O my public IP Starting Nmap 6.47 ( http://nmap.org ) at 2015-11-02 11:03 EST Nmap scan report for my public IP Host is up (0.015s latency). Not shown: 998 filtered ports PORT STATE SERVICE 6668/tcp closed irc 6669/tcp closed irc Warning: OSScan results may be unreliable because we could not find at least 1 open and 1 closed port Device type: general purpose Running: Linux 2.4.X|3.X OS CPE: cpe:/o:linux:linux_kernel:2.4 cpe:/o:linux:linux_kernel:3 OS details: DD-WRT v24-sp2 (Linux 2.4.37), Linux 3.2 OS detection performed. Please report any incorrect results at http://nmap.org/submit/ . Nmap done: 1 IP address (1 host up) scanned in 50.44 seconds