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

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1answer
83 views

mod_security RBL - apparent false positive

I'm struggling with an RBL rule in mod_security under apache 2.2 that seems to be giving me a false positive. I see the following in the audit log (IP address redacted): Message: RBL lookup of ...
0
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0answers
160 views

mod_security and CSF protection for Wordpress - ban release issues

We're using mod_sec and CSF to protect client Wordpress logins from brute force attacks. System admin is using the popular 0134 / 0135 rule in mod_sec: SecAction ...
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2answers
439 views

What web application firewall do you use? What should I use? [closed]

What web application firewall do you use? I'm primarily interested in something I can deploy on the perimeter that can protect multiple Apache and IIS servers, but I'd like to hear all answers. Tell ...
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3answers
234 views

Block traffic behind AWS ELB

My web servers are behind ELB, I want to block traffic from some specific user agent which is a DDOS attack. Apache always see ip address of ELB as an end user so I tried below attempts: Blocking IP ...
5
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0answers
522 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 ...
0
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0answers
51 views

Modsec XSS Filter Issue

Modsecurity is denying a particular email address and I can't figure out why. This rule has never been triggered before for me and the form where this data comes from is used hundreds of times per ...
1
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1answer
269 views

Mod Security ctl:ruleEngine=Off Whitelist Fails in Phase 1

Background info : cPanel server with atomicorp ruleset, plus our own custom rules and whitelists in separate .conf files - Apache 2.2, modsec 2.8 Whitelist rule: SecRule REMOTE_ADDR ...
0
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1answer
376 views

mod_security not blocking empty useragent requests

I can't get mod_security to block empty useragent requests. I am not very saavy with it so after searching I found this rule: SecMarker BEGIN_UA_CHECK SecRule &REQUEST_HEADERS:User-Agent "@eq 0" ...
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3answers
912 views

Test whether mod_security is actually working

I'm running this on my staging server for the first time and I think I did everything correctly. I can see entries in modsec_audit.log when I run nikto2 against it, but for the life of me I can't ...
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0answers
52 views

Server wont let me save URLs to MySQL database?

I am posting here because all other forum say it's a server environ issue. I have a site with the ModX CMS on it hosted on a GoDaddy server (not sure about the specific setup is as client has ...
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0answers
35 views

ModSecurity on IIS: Single threaded?

I installed ModSecurity on a web server running IIS 8.5, and noticed the response time has increased 15 times (0.15 ms/request vs. 2.2 ms/request), even with SecEngine set to off. It seems that IIS is ...
1
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1answer
104 views

Proper SSL config for SSL - Apache2 ignores DocumentRoot

So here's my current config: <VirtualHost *:443> DocumentRoot "/var/www/keypad" ServerName keypad.io SSLOptions +StrictRequire <Directory /> SSLRequireSSL ...
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1answer
49 views

Fine-grained control over mod_security logging

I installed mod_security2 on several dozen servers (each with several dozen VHosts) and don't have the time to configure it for every VHost. In the default configuration, it produces copious amounts ...
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2answers
2k views

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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0answers
28 views

What is /stop in my server logs?

Why do my server logs show GET requests to /stop? I believe this is due to modsecurity but cannot determine why or the importance.
1
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1answer
779 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
130 views

How i can block requests for a specific page?

I would like to completely delete or block access to a specific page in my site. More specifically, I have seen this exploit "Joomla COM_MEDIA Exploit" : ...
0
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1answer
43 views

Mod Security2 deactivation rule only from a specified IP addresses

Is it possible to disable a rule by Mod Security2, only for one specified IP addresses? Only for one specified IP addresses & only for one specified path ( /administrator ) ? I tried this: ...
0
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1answer
205 views

Modsecurity Preventing Access to WSDL

I have installed mod_security with the OWASP rule set and it is now blocking my ability to call a web service using a WSDL. When my code tries to make the web service call, I see the below in the mod ...
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1answer
168 views

Apache error_log filled with modsec blocks

Ever since I enabled Apache modsecurity I've been checking the logs and been seeing the following constantly like 24/7: [Wed Jun 25 12:40:07 2014] [error] [client 112.215.65.61] ModSecurity: Access ...
2
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2answers
1k views

modsecurity apache mod-security.conf missing [closed]

Greetings Serverfaultians. I'm not a server guy as you can see from my noob score of 1 point. But maybe those more versed can help me. I'm using Ubuntu v13.10 32-bit Server and Apache2 v2.4.6 and I'm ...
0
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0answers
140 views

Nginx and dynamic X-Forwarded-For blocklist

I am running Nginx behind a proxy. I am getting visitors' real IP addresses through X-Forwarded-For HTTP request header. I'd like to block individual IPs based on a dynamic block list, up to 10000+ ...
0
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1answer
640 views

csf lfd denied by desktop because of mod_security

I have a WHM/Cpanel server with CSF/LFD installed and mod_security enabled. I used to login to WHM/cpanel from one of my local windows box through a linux (Centos 5)NAT gateway(with a public IP ...
0
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1answer
537 views

apache2 reverse proxy broken after modsecurity is installed ubuntu on 12.04.1

this is the first time I have run into issue like this one. I have a java application setting behind a apache2 using mod_ajp on 8009. I have noticed that I could not get the client's IP so I have ...
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0answers
135 views

Nginx + mod_security without a backend server

I want to start using mod_security for Nginx. However, I have read the official doc and something got my atention: ...
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0answers
355 views

Error install mod_security on nginx

I have problem when install mod_security on nginx. I add flagment on /etc/nginx/nginx.conf server { listen 80; server_name localhost; location / { ModSecurityEnabled ...
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0answers
131 views

External Web Application Firewall infront of IIS

We have a public facing IIS webserver hosting an ASP website which is not very secure, to say the least. I have found out several serious flaws in the last few months and would like to do something ...
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0answers
373 views

Curl Sourced DDoS: How to detect it & how to stop?

Okay, an Ubuntu server I manage fell victim to a DDoS attack today. Usually this is unpleasant but not that big a deal. A few high server load moments & then it passes. Today was clearly ...
0
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1answer
497 views

Apache/ModSecurity - Blocking HTML Textarea with 403 when it contains a linebreak (enter key)?

I have a contact form, within this contact form is a textarea. If i fill out the contact form and in the test area, i enter one line of text, e.g. Example The form completes and i am notified via ...
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0answers
121 views

Modsec: Set env variable based on User-agent

Relatively new to Apache modsec. Trying to do something simple and hitting a wall. I want to set an environment variable based on the User-Agent, and test it by setting a header. I have this: ...
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0answers
192 views

How to solve UNIQUE_ID variable issue in modsecurity_crs_16_session_hijacking.conf ubuntu 10.04

I have been trying to harden ubuntu 10.04 using modsecurity and its core rules from owasp version 2.2.5. I have used the package from their github . After the symbolic link of the files in the ...
4
votes
2answers
5k 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 ...
1
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1answer
299 views

Configuring mod_security on Ubuntu 10.04

After spending ~24 hours trying and failing to setup mod_security in Ubuntu 10.04 LTS, I've finally decided that I'm going to need some help. I've tried pretty much every tutorial I can find with a ...
2
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2answers
100 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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votes
1answer
1k 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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0answers
75 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
64 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 ...
0
votes
1answer
91 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?
4
votes
2answers
190 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 ...
4
votes
2answers
10k views

How do I find out if mod_security is installed on my apache server?

How can I find out if mod_security is installed on my apache server? I would also like to learn its version. I'm having some upload issues and I tried to disable mod_security using .htaccess. But ...
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0answers
166 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 ...
1
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0answers
360 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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2answers
526 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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0answers
714 views

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 ...
0
votes
1answer
41 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
186 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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votes
1answer
271 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 ...
0
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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 ...
0
votes
1answer
1k 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 ...
-1
votes
2answers
484 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 ...