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Re: Worm probes
From: <z () s0be net>
Date: Tue, 18 Sep 2001 10:31:35 -0700 (PDT)




On Tue, 18 Sep 2001, Joseph McDonald wrote:



spc> Has anyone else been seeing a dramatic increase in /scripts/.. NT worm
spc> probes this morning?  We're seeing about 8000/second, starting around 9:15

Yes. We are seeing it here bigtime.  Does anyone have any apache hacks
to lessen the impact?  One idea:  Once a probe is sent, the prober's
IP# is stored in a hash (perhaps in shared memory or a mmap'd file
that all children can share) and new connections from that IP are no
longer accepted.


<--( SNIP )-->


  That would still allow the malicious network traffic to traverse your
network.

  I'm not seeing more than about 60 unique hosts that are scanning ( YMMV
), so that isn't a huge hit for me ACL-wise ( again YMMV ).   Your choice,
let them bang on your router or your web servers.   Depends on your
situation.

.z



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