WAF stands for Web Application Layer Firewall. WAF is a application layer firewall that is meant to secure the back end web server by monitoring every HTTP request and response to and from the server.

learn more… | top users | synonyms

0
votes
0answers
23 views

LFI Waf Bypassing help [on hold]

i encountered a LFI, where the WAF strips the slashes and some strings near to it: I tried using a truncated payload, it doesn't works! Example behavior of the app: Payload: ...
-1
votes
2answers
60 views

What are the difference between IPS and WAF in terms of DDoS?

I have heard about both Web Application Firewalls (WAF) and Intrusion Prevention Systems (IPS). Which is better in preventing a Distributed Denial of Service (DDoS) attack and why?
3
votes
2answers
78 views

How web application firewalls protect application from DDoS attacks?

How to protect a web application from DDoS by the implementation of Web Application firewalls? How effective is this method?
21
votes
9answers
2k views

Is a web application firewall necessary if the application is secure?

Recently I've been reading about Web application firewalls and the fact that they protect against most frequent attacks like injections, XSS or CSRF. However, a good application should already be ...
6
votes
1answer
263 views

Isn't a HIDS, NIDS and WAF complementary?

Assume this scenario: Someone trying to hack a website. Simply put: www.site.com/example.php?=<script>alert(1)</script> A HIDS would see this attempt in Apache's access log, a NIDS would ...
1
vote
2answers
243 views

Is SSL required for sites hosted behind WAF?

We have a website hosted behind WAF and we will be using HTTPS. The server already has a valid SSL. Do we need to install SSL on WAF servers also?
1
vote
1answer
378 views

WAF testing frameworks

How to test the effectiveness of a Web Application Firewall (WAF), or any other security control that is put in place to protect the web application from being attacked? Currently, what are the ...
10
votes
1answer
236 views

WAF Process Creation for Integration of IT and Business

A client has asked me to help them out with their WAF processes. Currently they have a few critical web applications being protected by a couple of WAFs. I have managed to get the WAFs tuned and ready ...
12
votes
2answers
669 views

When performing a PenTest against a WAF-protected site, what should a Pentester know to enhance the Test-Quality?

I'm running a WAF infront of a bunch of Webapps and we have the Apps regulary tested, and we want to improve our Tests by presenting some kind of livelogs to the testers. What informations, from ...
1
vote
3answers
1k views

ModSecurity errors related to REQUEST_METHOD HTTP/1.1 and GET

I asked my host to switch on the log file, and it have increasing a lot since then. Its have been increasing with 700 mb for the last week. It’s filled with error messages related to Mod Security. ...
2
votes
4answers
575 views

Generic defense againt SQL injection

This is a little bit of a rant, but there's a real question at the end. I recently installed a new perl script on a site (which will remain nameless) which failed mysteriously with an error 403. ...
1
vote
1answer
577 views

WAF SQL evasion using HPF technique

I was reading an article on WAF evasion techniques http://www.slideshare.net/devteev/methods-to-bypass-a-web-application-firewall-eng. The article discuss two techniques HPP (HTTP parameter ...
-1
votes
1answer
180 views

Writing application specfic rules for WAF?

I was reading an article on "Protocol-Level Evasion of Web Application Firewalls" and the article insist on writing application specific rules in this manner: <Location /index.php> ...
-1
votes
1answer
842 views

Using ModSecurity as transparent mode

I want to use Mod Security as transparent mode. Mod security WAF should be between server and client and client provided with only server's ip address to access the site. The client should not ...
4
votes
1answer
665 views

Securing a simple webservice against brute-force with mod-security

I want to provide basic defense against brute-force attacks against a simple HTTPS web service. The web service provides a login method (let's say at http://example.org/login) which gets passed a ...
1
vote
1answer
485 views

How to filter https traffic in mod-security WAF?

I'm developing a WAF with good GUI and better log. And my base firewall is mod-security. It works well for http but I also want to work my WAF with https. Any suggestions?
1
vote
3answers
501 views

Testing Web Application Firewall Configuration (ModSecurity)

What is the best way of testing my Firewall configuration as i have deployed the Core Rule set provided by the OWASP. But my rule configuration was giving me too many false positives which i resolved ...
14
votes
5answers
831 views

Application security training for developers [closed]

I am trying to establish an application security group within an organization and although there is a plethora of courses for penetration testers, i fail to find an equal amount of training courses ...
-4
votes
1answer
189 views

Secure Traffic model for Web application Protection

Web Application Firewalls relies on negative and positive security traffic rules to protect web application from being exploit. My question is that is their any other web traffic modelling technique ...
2
votes
2answers
431 views

Anomaly based web application Firewall

How practical are anomaly based web application firewall in mitigating web based attacks ? Which types of threats do they mitigate against and which don't they? Are their any practical implementation ...
2
votes
1answer
246 views

IDS/WAF scenario for 2 web servers

I'm running 2 web servers on 2 different physical hosts at home. They handle both HTTP and HTTPS traffic. I want to protect against web application attacks, but don't want to spend money for ...
16
votes
1answer
549 views

What is a “Trailing Host Header”, and how can I test for it?

My team's been doing some research into WAF protections based upon a WAF testing tool released at Black Hat this year. In the tool, there's a list of hostname evasion tests - that are really just an ...
8
votes
3answers
1k views

Evasion techiques for WAFs

Is there any documented techniques for evading Web application firewall for testing WAF rule configurations.
2
votes
2answers
282 views

Web Application Firewall Rules

For Network Layer Firewalls we have different sort of redundancy and consistency checks like rule shadowing, that can impact the performance of firewall. Do similar kind of checks can be applied on ...
1
vote
1answer
214 views

Web Application Firewall Rule Optimization

Following are the two Rules taken from ModSecurity CRS core Ruleset. These two rules are base Rules for XSS attacks. If we look at these two rules their variables and actions are same what they differ ...
1
vote
1answer
217 views

Working of WAF/IDS/IPS payload normalization schemes?

I want to know how WAF/IDS/IPS deals with Payload Transformations. Such payload transformations may be base64Encode html EntityDecode url Encode Remove whitespaces I want to know how WAF/IDS/IPS ...
2
votes
1answer
873 views

Mod Security for apache2 blocks curl!

I'm trying to get my users lat and lng from their address using google's geocoding api but when mod security is enabled it prevents it and the script timesout. How can I add an exception by ip or ...
10
votes
1answer
321 views

Is there a web application firewall equivalent of virustotal?

I'm wondering if there is a web application firewall (WAF) equivalent of VirusTotal? A site where I can throw for example injection strings, exploits or xss, and it will tell me what the default ...
2
votes
2answers
238 views

ip-fragmentation and mod_security?

is it possible to use ip-fragmenation (for example with fragroute) to evade mod_security? the idea would be to split a sql-injection- or xss-string into little pieces so it s not recognised.
7
votes
5answers
1k views

Master thesis topic - mod_security

I've been playing with mod_security for some time and I'd like somehow to use it in my master thesis. I don't know exactly how this work could be more interesting than describing what mod_security ...
16
votes
1answer
2k views

What is a Web Application Firewall?

What is a Web Application Firewall (WAF) and what are some of the things to look for in an effective one? Why would you deploy a WAF instead of just an IPS?
9
votes
2answers
2k views

How do I get started using ESAPI WAF?

I've been to the OWASP Enterprise Security API (Java Edition) Google Groups page and found this information missing.