Re: Network Flood

Bad network card or other hardware problem?

On 30 Aug 2006 10:20:34 -0700, "GregG" <e.pricecut@xxxxxxxxxxx> wrote:

I'm pulling my hair out on this one. An XP workstation is bringing down
my home network and keep resetting a DSL router. I really cannot
rebuild it as it has so much stuff on it.

I do know what is causing this but there is an extensive message
exchange between an XP workstation and a Domain Controller/DNS/NAT
server. 2 other workstations are not involved. It's happening almost
all the time with short intermissions. I shut down all applications and
stopped all services at XP, which are possible to stop without
degrading functionality.

Network monitor shows thousands of frames in a minute coming from
server to workstation. They are all the SAME:

Protocol = HOPOPT - IPv6 Hop-by-Hop Option; Packet ID = 0; Total IP
Length = 0; Options = No 0.0.0.0 0.0.0.0 IP

At the same time (and this is weird) XP sends thousands of DNS request
to my DNS server for different internet domains (for thousands of
different domains I never heard of!!) for Mail Exchange. My DNS in turn
floods the internet querying provider's DNS and bringing DSL router
down once in a while. Example:

DNS 0x14AE:Std Qry for wvbr.com. of type Mail Xchg on class INET addr.
MATRIX 140.120.100.107 IP

I fight this for 3 days. No viruses or spyware is found (scanned with 3
different applications). Processor at 99% idle. Regmon shows constant
access of dnscache service and parameters in tcpip service.

Can anyone help?

Please respond to the Newsgroup, so that others may benefit from the exchange.
Peter R. Fletcher
.

Relevant Pages

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