Apache DoS Global Attack

Jun 20, 2009

I have just saw on leaseweb noc site that there has been a public release of a Apache DoS tool and all All versions of Apache are vulnerable.

So can anyone confirm this and give some possible solution or advices? ....

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Apache Global Configuration

Oct 30, 2009

my server there it one site

but this site His alexa ranking of 7.000

i need Apache Global Configuration

StartServers = ?
and this
MinSpareServers = ?
and this
MaxSpareServers = ?
and this
MaxClients = ?
and this
MaxRequestsPerChild = ?

browsing heavily on the site, which lead to stoppage of the Apache

Server Information
Intel Core 2 Quad Q9550 2.83GHz
8GB Ram

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Apache Attack

Sep 30, 2007

I've a dedicated with 1 site hosted on, but its a big forum that have a numerous apache attack like :

entersomenicedatastringshereidontthinkthisislongenoughsoiwilladdmorehehe

190218806268

[Thu Sep 27 08:59:12 2007] [error] [client 41.221.18.199] Invalid URI in request entersomenicedatastringshereidontthinkthisislongenoughsoiwilladdmorehehe

707671880723

[Thu Sep 27 08:59:12 2007] [error] [client 60.54.153.233] mod_security: Access denied with code 403. Pattern match "!HTTP\/(0\.9|1\.0|1\.1)$" at THE_REQUEST [id "340000"][rev "1"] [msg "Bad HTTP Protocol"] [severity "1"] [uri ""]
mod_security: Access denied with code 403. Pattern match "!HTTP\/(0\.9|1\.0|1\.1)$" at THE_REQUEST [id "340000"][rev "1"] [msg "Bad HTTP Protocol"] [severity "1"] [uri ""]
[Thu Sep 27 08:59:49 2007] [error] [client 80.78.48.132] File does not exist: /usr/local/apache/htdocs/403.shtml
[Thu Sep 27 08:59:49 2007] [error] [client 87.110.121.99] Invalid URI in request entersomenicedatastringshereidontthinkthisislongenoughsoiwilladdmorehehe

607938289643

[Thu Sep 27 08:59:50 2007] [error] [client 220.116.89.243] Invalid URI in request entersomenicedatastringshereidontthinkthisislongenoughsoiwilladdmorehehe

309682726861

---

Mod_security, mod_evasive are installed of course but they cant block this from happening which stops the apache from working.

I've even asked LT to install Cicso ASA 5505 as they told me it will help much, but seems like they don't know how to manage it, so that the server went down every few min for 24 hour till I asked them to uninstall it.

Does the Cicso firewall really helps in that case or what ? if so, what provider should I move to that have experienced staff and can get it work in right way?

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How Do I Secure Apache From Ddos Attack's

May 17, 2009

way to secure apache from ddos attack's on centos 5.3.

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DOS Attack Over Apache, Full Of READING Connections

Feb 5, 2007

As you can see my apache is full of Reading connections..... they are filling up my server dening legitimate users to browse trought the websites hosted there... I think this is what is happening to me:
http://mail-archives.apache.org/mod_...l.gmail.com%3E

Im using apache 1.3.3.7 on RHES 3 with latest patches and kernel.

930 requests currently being processed, 6 idle servers
RRRRRRRRWRRRRRWRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR
RRRRRRRRRRRRRRRRRRWRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR
RRRWRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRWRRRRRRRRRRRRR
RRRRRRRRRWRRRWRRRRRRRRRRRRRRRWRRRRRRRRRRRRRRRRRRRWRRRRRRRRRRRRRR
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR_RRRRRRRRRRRRR_RRRRRRR
RRRRRRRRRRRRRRRRRRRRRRWRRRWRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR
R_WRRRRRRRRRRRRRRRRRRRRWWRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRWRRRRRRR
RRRRRRRRRRRRRWRR_RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR_
RRRRRRRRRRRRRRRRRRRRRRWRRRRRRRRRRRRWRRRRRRRRRRRRRRRRRRRRRRRRRRRR
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRWRRRRRRRRRRRRRRRRRRRRRRRRRRRR
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR
RRRRRRRRRRRRRRRRRRRRRRRRR_RRRRRRRRWRRRRRRRRRRRRRRRRRRRRRRRRRRRRR
RRRRRRRRRRRRRRWRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRWRRRRR
RRRRRRRRRRWRRRRRRRRRRRRRRRRRRRRRRRRRR.RRR.......................

1-044940/40/40R 0.33340.00.060.06 ??..reading..
2-044950/55/55R 0.47330.00.110.11 ??..reading..
3-044960/35/35R 0.31330.00.050.05 ??..reading..
4-044970/38/38R 0.13210.00.090.09 ??..reading..
5-045410/40/40R 0.16360.00.130.13 ??..reading..
6-046190/28/28R 0.12110.00.030.03 ??..reading..
7-046220/34/34R 0.35320.00.100.10 ??..reading..
8-051640/34/34R 0.135100.00.300.30 ??..reading..

Also, here is the top output of the top command:

top - 12:46:21 up 10 min, 1 user, load average: 1.40, 2.03, 1.06
Tasks: 1063 total, 2 running, 1060 sleeping, 0 stopped, 1 zombie
Cpu(s): 4.9% us, 1.6% sy, 0.0% ni, 93.1% id, 0.3% wa, 0.0% hi, 0.0% si
Mem: 2073516k total, 2001984k used, 71532k free, 42384k buffers
Swap: 2048276k total, 0k used, 2048276k free, 178096k cached

Server seems to be fine, but total tasks are always between 1060 and 1124... thats very rare too..

how to avoid this attack?

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DDOS Attack Kill Only Apache Server

Jan 11, 2007

I have a question related DDOS attack. My hosting provider told me that my Server was DDos attacked few days ago. But in those days my server worked fine only apache server was down. The strange fact is that in the same day with this "DDOS attack" one of theyr admins worked something on SSL section of my server and during this operation the SSL hosts were down and httpd worked slow.

Inthe passed 3 months httpd worked very slow and after 2-3 restarts of httpd service the load droped down below 3.00 . I believe theyr httpd service was already with problems and that SSL configuration cause that apache failure in that day with "ddos attack"

I repeat in that day ONLY ssl hosts worked fine and non SSL hosts were down.

It's possibile on DDOS attack that load to be unde 0.5 , SSL hosts to work fine, FTP, Mail and other stuf to work like there is nobody on server (VERY FAST)?

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Apache Under Attack :: Configured Request Variable Value Length Limit Exceeded

Apr 21, 2008

My server was unstable at this month sometimes fork 700 process and apache 80 access per second and that's made server very slow . very bad browsing

when i checked log files /var/log/messages found that errors

Apr 20 04:06:28 suhosin[798]: ALERT - configured request variable value length limit exceeded - dropped variable 'message' (attacker '212.107.116.238', file '/usr/local/cpanel/cgi-sys/php4')
Apr 22 00:27:05 suhosin[15442]: ALERT - configured request variable name length limit exceeded - dropped ....

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Jan 2, 2009

i have both PHP(php4 & php5) together

PHP4.........CSO (defoult)

PHP5.........CGI

i have already transfered a site from another server to my server !

this website using PHP5 and they asked me to enable register_global
but i don`t know how to active register_global when PHP5 set as CGI
value will not be accepted when PHP5 set as CGI : php_flag register_globals 1
* i think the last server used Suphp ( i found some files like : php.ini in FTP)

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The current wish list of locations includes -

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