ModSecurity supplies an array of request and response filtering rules and other security features to the Apache HTTP Server. ModSecurity is an open source web application layer firewall.

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mod_security configuration issue: Error parsing actions: Unknown action: ver

I am trying to install / configure mod-sec using this tutorial, which uses the OWASP ModSecurity Core Rule Set. However when I go to restart apache, I get the following error: Syntax error on line 53 ...
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2answers
154 views

How to use Modsec rules to certain page?

i want to block proxy(x-forwarded) ip certain page(wp-comments-post.php) using Apache Mod_security. my current mod_security rule: SecRule REQUEST_HEADERS_NAMES "^x-forwarded-for" ...
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1answer
2k views

how to whitelist a certain cookie string in ModSecurity

We are getting a lot of False Positives from using 3rd part software on our server. They themselves can't seem to fix it and I'm trying to work out how to allow cookies through that contain ...
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126 views

ModSecurity: What do MULTIPART_DATA_BEFORE and MULTIPART_DATA_AFTER mean?

I'm getting the following ModSecurity error when posting form data to a LiquidWeb server: Multipart request body failed strict validation: PE 0, BQ 0, BW 0, DB 1, DA 1, HF 0, LF 0, SM 0, IQ 0, IP 0, ...
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1answer
71 views

how i configuration mod_security? [closed]

when i setup mod_security default configuration then if anyone go wordpress admin panel and change any code or some modified then his ip block. why? my all customer complain for this problem. how i ...
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1answer
120 views

How to block/ban clients that try to access some paths / urls?

Some spambots hammer my server with nonexisting paths like /user/pass?=asdfdasfas How could I block any access to /user/pass?=* ? Is there a better tool than iptables or csf for catching such crap?
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2answers
234 views

Why bother reverse proxying applications if you aren't using mod_security or TMG/UAG?

Common wisdom is that internal applications that live inside of the trusted network, such as Exchange, should be reverse proxies whenever they are exposed to the Internet. Microsoft recommends using ...
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1answer
622 views

ModSecurity on Apache (Debian Wheezy), Authentication logging

I am new to ModSecurity, it works great on the server, but I would like to control the way it logs things. For example as I am troubleshooting my website in order to whitelist or correct php coding ...
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2answers
7k views

mod_security not actually blocking requests despite rule trigger & returning 403

I've pulled my finger out and installed mod_security to protect our WHMCS installation (a PHP based billing system) from some of the more obvious SQL injection attacks to try and minimise our ...
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205 views

nginx with fail2ban and mod_security

I forgot to update my fail2ban config for nginx. I just moved to nginx from apache. Today, I got a lot of cals from a single IP. IP tried to access login pages with post and get methods IP tried to ...
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548 views

How do I handle apache2 modsecurity2 warnings like Match of “rx ^OPTIONS$” against “REQUEST_METHOD” required?

After upgrade from squeeze to wheezy I get loads of these messages in my apache errorlog when I open a webpage on myserver, (changed to myserver.de here): [Sat Oct 19 01:06:21 2013] [error] [client ...
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ModSecurity: collections_remove_stale: Failed deleting collection

Environment: Ubuntu Server 12.04 64Bit with Apache/2.2.22 (Ubuntu) and Worker mpm with modsecurity 2.7.5 and OWASP CRS latest. Problem: When server is under a load of 1500 concurrent users ...
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1answer
60 views

Find excluded keywords for $_POST/$_GET content with ModSecurity? [closed]

Our client has ModSecurity 2.0 with Rule Set 2.0.5 but he told us that minor detail at the end of the development. I need to audit all the application code and make sure it does not interfere with ...
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0answers
237 views

apache DirectoryMatch matching filenames

I have the following code in my security.conf file of apache <DirectoryMatch "/(albums|attachment(s)?|upload(s)?)"> Options -ExecCGI <IfModule php5_module> php_flag engine off ...
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1answer
440 views

You don't have permission to access /on this server

I created a form in joomla with 2000 fields but when I submit the form it gives me: error-- You don't have permission to access /en/soccer-player-update on this server. Additionally, a 404 Not Found ...
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2answers
2k views

Blocking repeated http requests in Apache behind a load balancer

I have a number of EC2 servers on AWS running apache behind a load balancer (ELB). Every now and then some IP address abuses the API hosted on the EC2 servers and causes a denial of service. I have no ...
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1answer
1k views

modsecurity whitelist to allow file downloads?

I have a site that has modsecurity enabled but I am receiving 403 Forbidden when trying to access PDF documents on the server through the web site. Is there a way to whitelist pdf files to allowed to ...
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1answer
143 views

mod_security to Inspect Post Variables

Can mod_security be used to inspect post variables? It looks like I can through turning SecRequestBodyAccess. I would like to check the username POST field from a form in wp-login.php. If it's value ...
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2answers
676 views

How to prevent from uploading shell

What is the best way to prevent from uploading c99shell,r57shell and another php sheller? i want when an attacker upload a shell the sheller don't show for him. I use mod_security ver 1.x Thanks in ...
0
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1answer
714 views

Apache 2.2.4: problems chroot with modsecurity

I've been installed mod_security. If i simply include in the httpd the configuration files of mod_security, it starts normally. Indeed, if i try to add SecChrootDir /mnt/chr , httpd will start, but at ...
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1answer
100 views

Proxying while preserving URI with mod_security2

I'm using a proxy: action in mod_security2. I'd like to preserve the full URL of the original request, however, and it seems to be rewriting that to the url in my proxy: action. So a request to ...
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0answers
559 views

short Apache outages (VPS, ModSecurity)

I have a problem with my site recently hosted at Liquidweb, none of their techs seems to be able to solve this issue even after days. Was hoping I could get some help here. Occasionally, my site's ...
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1answer
581 views

Apache vhost-specific logging

I have the following apache setting (in conf.d/owasp-modsecurity.conf): SecAuditLog "/var/www/vhosts/${lowercase:%{SERVER_NAME}}/statistics/logs/modsec_audit.log" When I do httpd -t I get the ...
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1answer
900 views

Limit mod_security rule to one vhost only

I run several domains (via vhosts) with the same apache installation. Some domains require different mod_security rules than the others. In a seperate exceptions.conf file I collect all those rules ...
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2answers
754 views

Blocking bad bots

I found this script and was wondering if this is just overkill and even worth using? Is it better for me to just use mod_security? # Generated using http://solidshellsecurity.com services # Begin ...
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1answer
896 views

Mod_security2 and clamav to catch malicious files on upload

Is there a clear documentation to describe the solution? It's very common and also necessary.
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241 views

log/dump response body

Is there any way to log response body in Apache 2? I need the exact content that will be sent to user browser. I tried mod_security audit logging, but it won't log response body for all requests. ...
3
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1answer
3k views

Enable Mod_Security for only one website

Is there a way to dis-able mod-security for all websites? except one? i have more than 500 websites hosted, only want to turn it on for one website, which is having attacks on it.
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1answer
733 views

Dropping incoming requests for a specific file with iptables

Server is a standard LAMP stack configured via cpanel on CentOS 5.9. We have one file, call it bad.php, on one of our domains that is mistakenly being accessed about 10 times a second by a service ...
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1answer
70 views

hosting provider web server blocks certain url string by using mod security [closed]

I have a blog which has a post with the following as url /blog/insert-into-tablea-select-fields-from-tableb-for-specific-values-only/ This was working well until recently. I got a different ...
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0answers
77 views

.htaccess ignored two layers deep on only some hosting plans [closed]

I have one .htaccess file doing this: RewriteRule ^system(.*)$ /system/app/$1 [QSA,L] ...and then underneath /system/app, I have another .htaccess file doing this: RewriteCond %{REQUEST_FILENAME} ...
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1answer
969 views

How do I include a rule set with ModSecurity on IIS?

I'm using ModSecurity 2.7.1 on IIS 7.5 / Windows 2008 R2. I've reference my base set up conf file in my Web.Staging.config of a site like so: <ModSecurity enabled="true" ...
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1answer
417 views

Does ModSecurity 2.7.1 work with ASP.NET MVC 3?

I'm trying to get ModSecurity 2.7.1 to work with an ASP.NET MVC 3 website. The installation ran without errors and looking at the event log, ModSecurity is starting up successfully. I am using the ...
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2answers
2k views

ModSecurity compile error on nginx

I'm trying to install ModSecurity on nginx with the following instructions : wget https://github.com/SpiderLabs/ModSecurity/archive/master.zip unzip master cd ModSecurity-master ./autogen.sh ...
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1answer
168 views

Side effects of using owasp mod_sec rules [closed]

I was looking at all the owasp rules for mod_security. How badly does it slow your loading time down if you use them all? What would be the recommended packages to use? I want to mostly block bad UA, ...
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1answer
483 views

Mod_security questions and on User-Agent types

Very new to mod_sec I want to block a UA string and I noticed there are a few types: SecRule HTTP_User-Agent SecRule REQUEST_HEADERS:User-Agent What is the real difference between them? My block: ...
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1answer
1k views

mod_security2.so: undefined symbol: ap_unixd_set_gl

service httpd restart Stopping httpd: [ OK ] Starting httpd: httpd: Syntax error on line 205 of /etc/httpd/conf/httpd.conf: Cannot load ...
0
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1answer
103 views

Installing mod_security [closed]

I have apache and suphp running. How hard is it to install modsecurity? Also, where can I find some light weight/generic rule-sets to not bog apache down?
3
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2answers
392 views

Mod_security Logging

Im trying to run mod_security as standalone service with nginx as reverse proxy everything works fine except logging. Mod_security logs reverse proxys ip addres instead of clients ip address. I would ...
1
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1answer
1k views

Nginx with mod_security support

I have compiled nginx with mod_security support. In error log I can see the support for mod_security 2012/08/27 11:13:11 [info] 602096#0: ModSecurity for nginx/2.7.0-rc2 ...
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1answer
275 views

mod_security: track user to check if redirected to login failed page

I have to log when a user fails to log in to a web application. Unfortunately, this web application is not able to do this out of the box and I can not change it. Now I'm experimenting with ...
3
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2answers
6k views

ModSecurity block specific string in request

I want a ModSecurity rule, which block the access to any url or any Body request Post/Get, if it contains a specific string. For example i want to block this string : "km0ae9gr6m" I have this rule ...
0
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1answer
705 views

ModSecurity not enabled

I have similar problem like question How do I enable mod_security in Ubuntu 10.04? , but i do not have the "minimal" file with me which i can replace and make it work. My configuration is also ...
3
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1answer
75 views

Modifying Apache configuration via a Web Interface

I would like to create a website on my server, which runs Apache2, to allow a user to fill in a form containing a desired subdomain name to be created on the server. For example, a user could go to ...
7
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1answer
4k views

What are PCRE limits?

In ModSecurity there are PCRE limits exceeded errors. I know I can fix this by setting rules such as: SecPcreMatchLimit 150000 SecPcreMatchLimitRecursion 150000 But, what are these rules actually ...
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3answers
3k views

How to drop all requests using mod_security

I have an apache2 server with several sites enabled on it, including the default one (000default). The default server is catching lots of spammy requests that are doing nothing but consume bandwidth ...
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0answers
176 views

Custom collections with mod_security

I would like to create a mod_security collection that is based on something other than the user's IP, Session ID, or username. Specifically, based on the REQUEST_URI. However, mod_security indicates ...
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1answer
1k views

Broken URLs after enabling mod_security

For example this pdf stopped working after enabling the mod, it generates 403 error. [Wed May 30 18:47:19 2012] [error] [client xxxxxxxxxxx] ModSecurity: Warning. Match of "within ...
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1answer
416 views

apt-get update Error

I get the following error when typing: # apt-get update W: Failed to fetch http://etc.inittab.org/~agi/debian/libapache-mod-security2/etch/Packages 404 Not Found [IP: 80.28.139.208 80] E: Some ...
3
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1answer
702 views

What do the audit log records for ModSecurity actually mean?

We have ModSecurity setup to log to modsec_audit.log for Apache2. Today we have had 2259 entries created in this log with a referrer of: Mozilla/5.0 (compatible; bingbot/2.0; ...