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PIX to Concentrator VPN Tunnel

James Bond

Diamond Member
We have a virus on a local network which creates random IP addresses and does DoS attacks outbound.

Because it creates random IP's it fills up the local host table (10 IP's max) in no time at all..

I created an ACL for the Tunnel to only allow "real" PC addresses outbound, but it didn't seem to help.

Any ideas/
 
have you isolated it to a single computer? instead of trying to counteract the DoS, i would work on tracking down the system and disconnecting it asap.
 
I ended up disconnecting everything connected to the PIX, other than the modem, and the problem continued (even after 'clear local-host'). Within a few seconds, if I did 'sh local-host' it would show tons of connections with fake IPs...

How can remote computers be creating local connections through the tunnel?!
 
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