Hi I'm wondering if this is normal default behaviour on my ubuntu machine.

When I do nmap quick scan, I get my host machine, my router, and also something running at

this is the output from nmap:


139/tcp open netbios-ssn

445/tcp open microsoft-ds

this looks suspicious: 139/tcp open netbios-ssn Samba smbd 3.X - 4.X (workgroup: HITRON) why is there a workgroup created?

arp -a shows this output:

( at 00:55:7b:b5:7d:f7 [ether]

Should these ports be open for default? I have not installed samba.

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