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howto prevent hacker access port 80

Posted on 2010-11-30
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Last Modified: 2012-05-10
Hi all,

Under /etc/httpd/log/ I found the following addresses trying to hack our web server through port 80, it is about 50 MB log file.

Example:
error_log:[Tue Nov 30 13:11:42 2010] [client 173.201.28.49] File does not exist: /var/www/html/phpmyadmin1
error_log:[Tue Nov 30 13:11:43 2010] [client 173.201.28.49] File does not exist: /var/www/html/phpmyadmin2
error_log:[Tue Nov 30 13:11:43 2010] [client 173.201.28.49] File does not exist: /var/www/html/pma
error_log:[Tue Nov 30 13:11:44 2010] [client 173.201.28.49] File does not exist: /var/www/html/web
error_log:[Tue Nov 30 13:11:45 2010] [client 173.201.28.49] File does not exist: /var/www/html/xampp
error_log:[Tue Nov 30 13:11:45 2010] [client 173.201.28.49] File does not exist: /var/www/html/web
error_log:[Tue Nov 30 13:11:46 2010] [client 173.201.28.49] File does not exist: /var/www/html/php-my-admin
error_log:[Tue Nov 30 13:11:47 2010] [client 173.201.28.49] File does not exist: /var/www/html/websql

what procedure shall I take to prevent this, it is too many ip address, do I need to block all of those, or just make sure password has  been set properly and prevent permission on important files.


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Question by:rawandnet
4 Comments
 
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fosiul01 earned 1000 total points
ID: 34239825
You can ignore those .. as they are trying to find hole by using bot program.

or
You can use mod security .

its a free products to prevent your websites. very powerful.  
but there is a problem

i have seen if the site is badly programmed then it might blocked some good request .. but you can work on it to fix the rules

other then that

Yes. thats the only product i will go for Mod security.

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by:Fadi SODAH (aka madunix)
Fadi SODAH (aka madunix) earned 1000 total points
ID: 34240395
as said by fosiul install apache mod_security, generally patching the system, use the right user:group, turn off unwanted services, disable unused modules, tune server and apache,  hide httpd.conf, restrict access, firewall/dmz ....etc.

look @
http://httpd.apache.org/docs/2.2/misc/security_tips.html
http://www.linux-magazine.com/w3/issue/106/052-053_kurt.pdf
http://www.linux-magazine.com/w3/issue/96/038-041_webauth.pdf
http://onlamp.com/pub/a/apache/2003/11/26/mod_security.html
http://www.modsecurity.org/

i use ex. watchfile now IBM aapscan tools http://www-01.ibm.com/software/rational/offerings/websecurity/  to scan all my web application as vulnerability checkers.
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Expert Comment

by:samri
ID: 34248654
another option to look at would be OSSEC which should take care of the whole OS.

http://www.ossec.net/

modsecurity is a way to go (imho) for apache alone.
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Author Closing Comment

by:rawandnet
ID: 34291057
thanks for your advice
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