Just a quick look at my syslog file, where MOO is the name of my ACL.
fgrep MOO /var/log/cisco/<router>.log | grep 27015 -c
fgrep MOO /var/log/cisco/<router>.log | grep 27016 -c
fgrep MOO /var/log/cisco/<router>.log | grep 27017 -c
fgrep MOO /var/log/cisco/<router>.log | grep 27018 -c
As you can see most of them were on 27015, these logs were from just one of
my transit interfaces.
----- Original Message -----
From: "Robert Blayzor" <rblayzor () inoc net>
To: "North American Network Operators Group" <nanog () merit edu>
Sent: Saturday, August 23, 2003 1:05 PM
Subject: Re: W32/Sobig-F - Halflife correlation ???
On 8/23/03 7:17 AM, "Darren Smith" <data () barrysworld com> wrote:
They were trying to hit servers in multiple subnets, all on ports 270XX.
I'm not sure on this. Lots of gaming servers use the 270XX UDP range.
Quake3, HL, etc.
It may be possible it's just probing for other HL servers running on
different ports. A lot of these games also use the same gaming engine for
the network and graphics abilities, so it's possible HL may not be the
"game server" in the mix, it may be any game that uses the HL engine. I
know there are several out there, Counterstrike being one of them.
So if it's not looking for a HL only exploit, I'd bet it's trying to get
infected machines to link up and communicate via the network of gaming
servers. This could be very bad because there could be virtually no way
stop this other than taking down the "Game Spy" type networks so the
computers can't find each other.
Robert Blayzor, BOFH
rblayzor () inoc net
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