I ran an nmap stealth scan on my home network (using linux) and this is my result. I don’t know why netbios is open – I ran the samba command and it is not recognised, so I don’t think I have Samba on my machine. If someone could clarify that would be great. I am running Ubuntu Linux. I’ve also noticed a lot of TCP ESTABLISHED connections I don’t recognise. Is this something to investigate further?
Not shown: 993 closed ports PORT STATE SERVICE 22/tcp filtered ssh 53/tcp open domain 80/tcp open http 139/tcp open netbios-ssn 443/tcp open https 445/tcp open microsoft-ds 49152/tcp open unknown