Re: Server Attack

[altendew <andrew@shiftcode.com>]

This does not spit anything out.

I have changed it to this.

tail -f /usr/local/apache/domlogs/leapcash.com|grep 'GET
/signUp.php?ref=ec0lag'|cut '-d ' -f 1|xargs /sbin/iptables -A INPUT -p tcp
-j DROP -s

When I run this

tail -f /usr/local/apache/domlogs/leapcash.com|grep 'GET
/signUp.php?ref=ec0lag'|cut '-d ' -f 1

it lists the IPs fine.. when I run

tail -f /usr/local/apache/domlogs/leapcash.com|grep 'GET
/signUp.php?ref=ec0lag'|cut '-d ' -f 1|xargs /sbin/iptables -A INPUT -p tcp
-j DROP -s

It doesnt spit out anything, how do I kno its working.

Chris Largret wrote:
> 
> 
> I'm going to go ahead and top-post on this (sorry). There has to be a
> limited number of computers these requests are coming from since the
> requests are coming over TCP. I'd write a quick script to grab the ip
> addresses and block them at the firewall level. Maybe something like this:
> 
> tail -f /var/log/apache/access_log|grep AppleWebKit|cut '-d ' -f 1|xargs
> /sbin/iptables -A INPUT -p tcp -j DROP -s
> 
> I haven't tested it (don't have a problem on my current server), but it
> _should_ follow the Apache requests, grab the IP addresses of users with a
> UserAgent of AppleWebKit and drop all TCP packets from the IP address
> until you reset your firewall.
> 
> ~ Chris Largret
> 
> 
> On Sun, 27 Aug 2006 14:58:37 -0700 (PDT)
> altendew <andrew@shiftcode.com> wrote:
> 
>> 
>> Hi someone is currently sending requests to our server 20x a second.
>> 
>> Here is what one of the logs look like.
>> 
>> [CODE]
>> Host: 84.77.19.46   /signUp.php?ref=1945777  
>>   Http Code: 403  Date: Aug 27 17:44:38  Http Version: HTTP/1.0  Size in
>> Bytes: -  
>>   Referer: -  
>>   Agent: Mozilla/5.0 (Macintosh; MTQ; PPC Mac OS X; en-US)
>> AppleWebKit/578.4
>> (KHTML, like Geco, Safari) OmniWeb/v643.68e=C:  
>> 
>> Host: 82.234.98.65   /signUp.php?ref=ec0lag  
>>   Http Code: 403  Date: Aug 27 17:44:38  Http Version: HTTP/1.0  Size in
>> Bytes: -  
>>   Referer: -  
>>   Agent: Mozilla/5.0 (Macintosh; CDB; PPC Mac OS X; en-US)
>> AppleWebKit/126.0
>> (KHTML, like Geco, Safari) OmniWeb/v554.35  
>> 
>> Host: 84.94.31.161   /signUp.php?ref=ec0lag  
>>   Http Code: 403  Date: Aug 27 17:44:38  Http Version: HTTP/1.0  Size in
>> Bytes: -  
>>   Referer: -  
>>   Agent: Mozilla/5.0 (Macintosh; TLD; PPC Mac OS X; en-US)
>> AppleWebKit/502.6
>> (KHTML, like Geco, Safari) OmniWeb/v401.63ive=C:  
>> 
>> Host: 81.49.24.92   /signUp.php?ref=1945777  
>>   Http Code: 403  Date: Aug 27 17:44:38  Http Version: HTTP/1.0  Size in
>> Bytes: -  
>>   Referer: -  
>>   Agent: Mozilla/5.0 (Macintosh; SZS; PPC Mac OS X; en-US)
>> AppleWebKit/230.1
>> (KHTML, like Geco, Safari) OmniWeb/v710.56ive=C:  
>> 
>> Host: 80.129.248.17   /signUp.php?ref=1945777  
>>   Http Code: 403  Date: Aug 27 17:44:38  Http Version: HTTP/1.0  Size in
>> Bytes: -  
>>   Referer: -  
>>   Agent: Mozilla/5.0 (Macintosh; OST; PPC Mac OS X; en-US)
>> AppleWebKit/243.6
>> (KHTML, like Geco, Safari) OmniWeb/v846.88  
>> 
>> Host: 87.235.49.194   /signUp.php?ref=ec0lag  
>>   Http Code: 403  Date: Aug 27 17:44:38  Http Version: HTTP/1.1  Size in
>> Bytes: -  
>>   Referer: -  
>>   Agent: Mozilla/5.0 (Macintosh; SDD; PPC Mac OS X; en-US)
>> AppleWebKit/430.1
>> (KHTML, like Geco, Safari) OmniWeb/v145.34  
>> 
>> Host: 125.129.12.61   /signUp.php?ref=1945777  
>>   Http Code: 403  Date: Aug 27 17:44:38  Http Version: HTTP/1.0  Size in
>> Bytes: -  
>>   Referer: -  
>>   Agent: Mozilla/5.0 (Macintosh; WCG; PPC Mac OS X; en-US)
>> AppleWebKit/455.3
>> (KHTML, like Geco, Safari) OmniWeb/v042.84stemDrive=\x81  
>> 
>> Host: 66.110.153.47   /signUp.php?ref=ec0lag  
>>   Http Code: 403  Date: Aug 27 17:44:38  Http Version: HTTP/1.0  Size in
>> Bytes: -  
>>   Referer: -  
>>   Agent: Mozilla/5.0 (Macintosh; ZAM; PPC Mac OS X; en-US)
>> AppleWebKit/387.2
>> (KHTML, like Geco, Safari) OmniWeb/v456.02ve=C:  
>> 
>> Host: 62.2.177.250   /signUp.php?ref=ec0lag  
>>   Http Code: 403  Date: Aug 27 17:44:38  Http Version: HTTP/1.0  Size in
>> Bytes: -  
>>   Referer: -  
>>   Agent: Mozilla/5.0 (Macintosh; LMZ; PPC Mac OS X; en-US)
>> AppleWebKit/206.1
>> (KHTML, like Geco, Safari) OmniWeb/v204.07es  
>> 
>> Host: 200.115.226.143   /signUp.php?ref=1945777  
>>   Http Code: 403  Date: Aug 27 17:44:37  Http Version: HTTP/1.1  Size in
>> Bytes: -  
>>   Referer: -  
>>   Agent: Mozilla/5.0 (Macintosh; EDE; PPC Mac OS X; en-US)
>> AppleWebKit/647.0
>> (KHTML, like Geco, Safari) OmniWeb/v760.47emDrive=C:\x81  
>> 
>> Host: 84.171.125.189   /signUp.php?ref=1945777  
>>   Http Code: 403  Date: Aug 27 17:44:37  Http Version: HTTP/1.0  Size in
>> Bytes: -  
>>   Referer: -  
>>   Agent: Mozilla/5.0 (Macintosh; QHA; PPC Mac OS X; en-US)
>> AppleWebKit/778.0
>> (KHTML, like Geco, Safari) OmniWeb/v456.03=C:  
>> 
>> Host: 83.242.79.70   /signUp.php?ref=1945777  
>>   Http Code: 403  Date: Aug 27 17:44:37  Http Version: HTTP/1.0  Size in
>> Bytes: -  
>>   Referer: -  
>>   Agent: Mozilla/5.0 (Macintosh; GFS; PPC Mac OS X; en-US)
>> AppleWebKit/537.0
>> (KHTML, like Geco, Safari) OmniWeb/v313.01rive=C:  
>> 
>> Host: 86.69.194.172   /signUp.php?ref=ec0lag  
>>   Http Code: 403  Date: Aug 27 17:44:37  Http Version: HTTP/1.0  Size in
>> Bytes: -  
>>   Referer: -  
>>   Agent: Mozilla/5.0 (Macintosh; ZCV; PPC Mac OS X; en-US)
>> AppleWebKit/468.2
>> (KHTML, like Geco, Safari) OmniWeb/v026.14stemDrive=\x81  
>> 
>> Host: 196.203.176.26   /signUp.php?ref=ec0lag  
>>   Http Code: 403  Date: Aug 27 17:44:37  Http Version: HTTP/1.1  Size in
>> Bytes: -  
>>   Referer: -  
>>   Agent: Mozilla/5.0 (Macintosh; BXT; PPC Mac OS X; en-US)
>> AppleWebKit/840.3
>> (KHTML, like Geco, Safari) OmniWeb/v767.50s  
>> 
>> Host: 201.41.241.190   /signUp.php?ref=1945777  
>>   Http Code: 403  Date: Aug 27 17:44:37  Http Version: HTTP/1.0  Size in
>> Bytes: -  
>>   Referer: -  
>>   Agent: Mozilla/5.0 (Macintosh; TYZ; PPC Mac OS X; en-US)
>> AppleWebKit/742.0
>> (KHTML, like Geco, Safari) OmniWeb/v715.65C:  
>> 
>> Host: 200.84.144.234   /signUp.php?ref=ec0lag  
>>   Http Code: 403  Date: Aug 27 17:44:37  Http Version: HTTP/1.1  Size in
>> Bytes: -  
>>   Referer: -  
>>   Agent: Mozilla/5.0  
>> [/CODE]
>> 
>> We are currently blocking this user through our Apache.
>> 
>> .htaccess
>> [CODE]
>> RewriteEngine On 
>> RewriteCond %{HTTP_USER_AGENT} ^Mozilla/5\.0\ \(Macintosh;\ (.+)\ PPC\
>> Mac\
>> OS\ X;\ en-US\)\ AppleWebKit/(.+)\ \(KHTML,\ like\ Geco,\ Safari\)\
>> OmniWeb/v([0-9]+).([0-9]+)(.+)$
>> RewriteRule .* - [F]
>> [/CODE]
>> 
>> That works fine and is giving the user a 403 (Forbidden), but the problem
>> is
>> that half of our Apache processes are from this user.
>> 
>> Is there a way to block his user agent before he gets to Apache?
>> Sometimes
>> this brings our server to a crash.
>> 
>> Thanks
>> Andrew
>> -- 
>> View this message in context:
>> http://www.nabble.com/Server-Attack-tf2174025.html#a6011508
>> Sent from the linux-kernel forum at Nabble.com.
>> 
>> -
>> To unsubscribe from this list: send the line "unsubscribe linux-kernel"
>> in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>> Please read the FAQ at  http://www.tux.org/lkml/
> 
> 
> -- 
> Chris Largret <http://www.largret.com>
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/
> 
> 

-- 
View this message in context: http://www.nabble.com/Server-Attack-tf2174025.html#a6014209
Sent from the linux-kernel forum at Nabble.com.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/