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Date:      Mon, 09 Oct 2000 02:49:29 +0200
From:      Palle Girgensohn <girgen@partitur.se>
To:        Raymond Wiker <Raymond.Wiker@fast.no>
Cc:        freebsd-net@FreeBSD.ORG
Subject:   Re: bridged vmnet make NIS go berzerk killing servers with icmp msgs
Message-ID:  <39E11619.4694F780@partitur.se>
References:  <87aeck14mk.fsf@palle.girgensohn.se> <39DC81E1.2C0F7315@quack.kfu.com> <14813.28763.410367.378304@raw.grenland.fast.no>

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Raymond Wiker wrote:
> 
> Nick Sayer writes:
>  > Palle Girgensohn wrote:
>  > >
>  > > Hi!
>  > >
>  > > Sorry for crossposting, but I'm not certain wheather this is -net or
>  > > -emulation; probably both...
>  >
>  > I see a similar failure every once in a while on FreeBSD machines that
>  > are NIS clients that are not running vmware, though it sounds to me like
>  > you are seeing it a lot more frequently.

hmmm... not running vmware? are they running an IP bridge, or
do you mean that this happens to vanilla fbsd systems?

>  > I can sometimes precipitate this by disconnecting an NIS client from the
>  > net briefly, using NIS, then reconnecting it. It ends up in the icmp
>  > supression state and the only way out is the history eraser button.

Yes, that is usually a "good" way to trigger it, but I have
seen it happen on occasion without disconnecting. Might be high
network load at those times, though, I'm not sure.

>         You can achieve the same effect by putting wildly
> inappropriate values in /var/yp/securenets...
> 
>         //Raymond.

Maybe, I could deny all bridged IP's from NIS by putting only
every allowed IP# in securenets, instead of the entire network
as now? The odd thing is, it is not the bridged IP that sends
the bad icmps, but the host's standard IP.

/Palle


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