Looking for Squid Proxies

[Cy.Schubert () UUMAIL GOV BC CA (Cy Schubert - ITSD Open Systems Group)]

I noticed in my firewall logs for one of the networks I maintain the
following:

Mar 15 18:11:15 foobar ipmon[98]: 18:11:15.512302 xl0 @0:1 b
194.87.6.92,2483 -> w.x.y.z,3128 PR tcp len 20 48 -S IN

This suggests that someone may be looking for Squid proxies.  I don't
run a Squid proxy on this network, however I do on another.  Are there
any Squid vulnerabilities this "attacker" is looking for?  Or is this
fellow trying to find a Squid proxy to bounce through to an IRC or NNTP
server?  Is his intention to find a Squid proxy in order to breach the
firewall it is running on in order to gain access to the internal
network it is protecting, e.g. use the proxy as a portal into the
internal network as opposed to compromising the Squid application
itself to gain entry?

Regards,                       Phone:  (250)387-8437
Cy Schubert                      Fax:  (250)387-5766
Team Leader, Sun/DEC Team   Internet:  Cy.Schubert () osg gov bc ca
Open Systems Group, ITSD, ISTA
Province of BC
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