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Interesting... I'm also reading up on the idle scan and possibly that's |
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what is going on here. |
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|
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I would highly recommend restricting outbound traffic from that server. |
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Even if this is a false positive it's a good idea to have things locked |
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down more tightly. I'd also recommend disabling loadable module support in |
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your kernel ;) |
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|
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Also, didn't that paper on the idle scan mention that more random IPIDs |
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would help prevent idle scans? GrSecurity has just the feature to take |
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care of this. You might want to check into using some of the GRSecurity |
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features in the kernel. :) |
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|
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HTH! |
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|
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On Fri, January 20, 2006 08:18, Jean Blignaut wrote: |
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> I'm still trying to get some help from the guy who does the main network |
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> firewall (FREEBSD that I have no access to) he does run snort on there |
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> also but to get any thing out of him is not that easy. |
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> |
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> On the box itself I run shorewall but I allow any traffic from the box |
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> to outside (probably need to change that) |
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> |
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> Nothing seems out of place in bash history and /var/log/messages doesn't |
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> seem to contain any thing usefull (only log dumped or rejected stuff in |
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> the fire wall) |
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> |
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> Ive been resetting up snort (apparently the guys servers where scaned |
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> yesterday and this morning so possibly I might learn some thing) |
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> |
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> -----Original Message----- |
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> From: xyon [mailto:xyon@×××××××××××.com] |
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> Sent: Friday, January 20, 2006 3:02 PM |
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> To: gentoo-server@l.g.o |
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> Subject: Re: [gentoo-server] portscanning worm? |
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> |
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> I know this seems like a given, but have you checked your bash_history |
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> (if |
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> it still exists), /var/log/messages, etc? Do you use a kernel with |
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> modules |
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> enabled? Do you have a firewall between the server and the outside world |
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> that would yeild any insight as to what that suspected box is doing? |
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> |
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> |
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> On Fri, January 20, 2006 06:24, darren kirby wrote: |
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>> quoth the Jean Blignaut: |
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>>> Hi All |
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>> |
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>>> I was contacted an hour or so aggo by some one claiming that they are |
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>>> being port scanned by an ip used on one of our production gentoo |
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>>> servers. |
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>> |
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>> This could possibly be someone using your machine as a zombie host for |
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> an |
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>> idlescan: |
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>> http://www.insecure.org/nmap/idlescan.html |
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>> |
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>>> Best Regards |
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>>> |
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>>> Jean Blignaut |
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>> |
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>> -d |
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>> -- |
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>> darren kirby :: Part of the problem since 1976 :: |
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> http://badcomputer.org |
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>> "...the number of UNIX installations has grown to 10, with more |
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>> expected..." |
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>> - Dennis Ritchie and Ken Thompson, June 1972 |
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>> |
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> |
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> |
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> -- |
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> Steven McCoy |
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> Site Development/Manager |
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> IndigoRobot Services |
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> http://www.indigorobot.com |
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> mailto:stevenmccoy@×××××××××××.com |
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> |
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> -- |
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> gentoo-server@g.o mailing list |
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> |
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> |
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> -- |
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> gentoo-server@g.o mailing list |
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> |
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> |
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|
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|
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-- |
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Steven McCoy |
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Site Development/Manager |
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IndigoRobot Services |
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http://www.indigorobot.com |
| 94 |
mailto:stevenmccoy@×××××××××××.com |
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|
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-- |
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