Great Circle Associates Firewalls
(May 1995)
 

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Subject: Re: WIN95 and UDP 137 and 138
From: Slava Kritov <scorp @ un . kiev . ua>
Date: Thu, 18 May 1995 10:31:09 +0300 (EET DST)
To: Tim Keanini <blast @ worldbit . com>
Cc: firewalls @ greatcircle . com
In-reply-to: <Pine . AUX . 3 . 91 . 950517203205 . 3871C-100000 @ world1 . worldbit . com>

Hi !

On Wed, 17 May 1995, Tim Keanini wrote:

> 
> I have solved a mystery on one of my internel networks.
> I would like to share it with you all:
> 
> If you install the Windows 95 package, there are these broadcasted UDP
> packets that are on src and dst port 137 and 138 UDP.  From what I
> have gathered, it is Windows 95 trying to tunnel NETBIOS via UDP.
Not only windows95, but also WfW with tcp protocol istalled.
One of the best solutions for file services in a network consisting
of Unixes ( ces;) and WfW - samba - is heavily relying on that ...
BTW from the point of security its VERY good - I mean you don't need NFS,
and you can easily block that kind of trafiic from going in/out...
> 
> Just wanted to share.
Just my 2 grivna's ( proposed, but not implemented ukrainian currency - 
thus being truly virtual ;)

Best
	Slava Kritov, 
	Senior Internetwork Specialist
	UN Internet Project in Ukraine


References:
Indexed By Date Previous: Re: FTP from Netscape problem (fwd)
From: Andrew Prusek <andrewp @ itwhy . bhp . com . au>
Next: Re: FTP from Netscape problem (fwd)
From: Slava Kritov <scorp @ un . kiev . ua>
Indexed By Thread Previous: WIN95 and UDP 137 and 138
From: Tim Keanini <blast @ worldbit . com>
Next: Re: WIN95 and UDP 137 and 138
From: wbunting @ inri . com (Bill Bunting)

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