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ICMP jams the router

By Net Designer ·
I found that one of WinXP client machines was sending huge number of pings (ICMP) to IP addresses not on my network in sequential order. As a result, the router (gateway) would jam and stop working. We scanned his w/s for viruses but did not find anything. When he's not connected to network, no ICPM activity happens. What else can we check? Thanks.

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Internet Connection Firewall

by Ewai In reply to ICMP jams the router

You could turn on the internet connection firewall on the XP box, and only allow HTTP traffic through? It does sound like a virus or similar. A net monitor program could produce that effect, for example if you set Transcend Net Monitor to scan for severs in a list of addresess outside your network range it would produce this result, so perhaps one of them is installed locally, or even a hacking tool which port sweeps? Or in fact can't viruses piggy-back other machines to use to port-sweep? I think I read that somewhere, so perhaps the virus is resident on anothe machine?

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