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Date:      Thu, 26 Aug 1999 19:23:11 -0400
From:      "Marty Leisner" <leisner@rochester.rr.com>
To:        "David B. Aas" <dave@ciminot.com>
Cc:        questions@FreeBSD.ORG
Subject:   Re: What uses Port 137-NETBIOS Name Service? 
Message-ID:  <199908262323.TAA02775@rochester.rr.com>
In-Reply-To: Your message of "Thu, 26 Aug 1999 09:10:21 CDT." <004301beefcc$bdfb9160$0fc8a8c0@dave.ciminot.com> 

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137 is the netbios name service socket.

137 shouldn't be sent through a firewall anyway (it should only
be local on a lan)  [well, not really, but this is a reasonable 
scenario).

> I am getting the following denial in my IPFW log:
> 
> Aug 26 08:53:51 gateway /kernel: ipfw: 3200 Deny UDP 207.195.152.19:137
> 208.149.231.82:137 in via xl1
> 
> xl1 is my outside net
> 208.149.231.82 is my address of xl1
> Rule 3200 is "deny log udp from any to any" which is my final rule.
> 
> I have a Windows NT Server inside my network, running NETbeui protocols. I
> appear to be getting these requests from outside.
> 
> What uses port 137? Nobody on the network seems to be complaining that they
> can't do stuff, so I am inclined to let it go, and keep denying the packets.
> Is there a reason I should be letting these packets through?
> 
> Does anybody hava any thoughts on this?
> 
> Thanks
> 
> Dave Aas
> dave@ciminot.com
> 
> 
> 
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Marty Leisner






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