mark@woodville.net
-----Original Message-----
From: Mark Morley <mark@islandnet.com>
To: portmaster-users@livingston.com <portmaster-users@livingston.com>
Date: Wednesday, November 19, 1997 3:32 AM
Subject: (PM) PPP user causing broadcast storms
>Today I noticed that when certain users establish a PPP session on one
>of our PM3's, I often see a massive flood of UDP broadcast packets. These
>packets number anywhere from a few hundred to fifteen thousand, and they
>all get sent within a 60-90 second period shortly after the user connects..
>
>A little packet sniffing shows they are netbios name service packets..
>They come from the user's IP and are sent to the Class C's broadcast
>address. When this occurs, the whole network freezes for a minute or
>two..
>
>This does not appear to be a deliberate "attack" by the user. I suspect
>that the wrong combination of settings on the user end causes this. Has
>anyone else seen this? I have been unable to duplicate the problem so
far..
>
>Tomorrow I'll call them all and audit their settings to see if I can
>see a pattern, but if you've seen this and know what's causing it please
>let me know - thanks..
>
>Mark
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