It is to my understanding that NetBIOS operates on port 137. I'm seeing NetBIOS traffic going from my machine to a remote address associated with an AT&T based IP address. I have that port blocked so I don't know why NBNS traffic is still showing up. Please see below. I think this is a cause for concern.
asked 14 Jun '15, 12:26  Beldum |
One Answer:
The NB name queries are broadcast packets being sent by 192.168.1.13, looking for a host named WPAD. The NBSTAT name queries are attempts by some Windows machine on your network to try to determine the NetBIOS host name for 12.83.88.89; that's just what Windows does, at least if it's configured to use NetBIOS-over-TCP, if some program is trying to find a host name for 12.83.88.89 - it might try DNS first, and fall back on NetBIOS-over-TCP if that fails, or it might even try NetBIOS-over-TCP first. answered 14 Jun '15, 13:37  Guy Harris ♦♦ |
