> Thanks man I fully understand this query now. You helped me understand this
> linux. I just looked up these commands and went along.
closed. Otherwise you may end up with hundreds/thousands of FIN_WAIT
sockets monopolizing processes. Shortening request timeouts and disabling
keepalive will help a lot too. I can also give you some tricks off-list
> altendew wrote:
> >
> > 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@...> 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@...
> >>> 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@...
> >> 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#a6014456> Sent from the linux-kernel forum at Nabble.com.
>
> -
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