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Date:      Fri, 24 Nov 2000 09:21:32 +0300
From:      "Vladimir I. Kulakov" <kulakov@kudesniki.ru>
To:        <freebsd-isp@FreeBSD.ORG>, <security@FreeBSD.ORG>
Subject:   DOS atack of hardware problem?
Message-ID:  <20001124062133.97CBE76F9@mtu.ru>

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Hello!

Last week I noticed some strange messages in my log files:
fxp0 : device timeout

After that the ping bacame unstable, and somtimes the
server was unreachable.

Our we replugged the server from 100 Mbit/s 3com switch to
ordinary 10 Mbit/s hub. It helped. The server started to work 
fine, but a few days after that the problems appeard again.
It seems the network card in our server unpedicably
swithes from 100 to 10 Mbits and from half-duplex to full duplex.
When we plugged the server to uplink port in our swith, everything
is working fine again...

Our Ethernet card - Intel Ether Express Pro 100/s

Can it be a flud or some kind of DOS-atack or it just a hardware 
problem? I tried another network card (also Ehter Express 100), 
but it's getting even worse - the server does not work at all. 

What is the best way to solve such a problem finally?

Many thanks in advance...

-----------------------------------------------------
Vladimir I. Kulakov          http://www.kudesniki.ru/
VK9-RIPN
kulakov@kudesniki.ru    
2:5020/779.27@fidonet.org






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