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| Subject: | Source Port 0 Host Sweep |
|---|---|
| Date: | Fri, 7 Jan 2005 10:32:41 -0600 |
I am receiving some alerts on our IntruShield IPS of a few internal hosts "TCP: ACK Host Sweep"ing the network. All sweeps have dest port 80 (and more interestingly) source port 0. I'm familiar with Host Sweeps and port 80 and know that port 0 is a valid port, but I've never seen anything actually _use_ it. I have googled and searched all the archives I could find and haven't seen anything describing this behaviour. I want to send our HW techs to the machines (all windows PCs) and have them cleaned, but I can't even tell them what to look for. Does anyone know of any app/malware/virus that causes this sort of Host Sweep? JM
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