Firewall Wizards mailing list archives
Re: UDP port 137
From: davidg () genmagic com (David Gillett)
Date: Fri, 29 Jan 1999 13:47:27 -0800
On 27 Jan 99, at 17:34, Burgess, John (EDS) wrote:
My firewall has been alerting me to "possible port scans" on UPD for port 137. This seems to occur from a number of source addresses and domains on the internet, some resolve-able, some not. Does anyone know of a reason I should be concerned?
Port 137 is the NetBIOS name service port. It's *possible* that someone is trying to scan your network this way, but the far more likely case is that these are folks connecting Windows clients directly to the Internet with file/printer sharing enabled. Probably many of the ones you can't resolve are dial-ups. You *do* want this blocked at the firewall, but you shouldn't lose any sleep over it once you've done that. David G
Current thread:
- Re: UDP port 137 Bret McDanel (Feb 01)
- <Possible follow-ups>
- Re: UDP port 137 David Gillett (Feb 01)
- Re: UDP port 137 John Kozubik (Feb 01)
- RE: UDP port 137 Chris Tobkin (Feb 01)
- RE: UDP port 137 Gibson, Brian (Feb 02)
- Re: UDP Port 137 Randy Witlicki (Feb 03)