News Feed
Sections




News Archive
Looking for more information on how to do PHP the right way? Check out PHP: The Right Way

Gareth Heyes' Blog:
Faking the unexpected
December 04, 2007 @ 08:36:04

Gareth Heyes has an example of yet another way he's seen developers incorrectly handle incoming connections and the information inside. This time, he focuses on the remote IP coming from the client.

Developers place too much trust in everything, they assume that certain data cannot be faked and therefore these pieces of data can be used as a Trojan horse. Lets take the REMOTE IP of a user, it seems a trusted source because of the TCP/IP connection between the user and the server.

He points out the difference between HTTP_X_FORWARDED_FOR and REMOTE_ADDR and how, despite them being the same almost all of the time, shouldn't be trusted since they could be spoofed. He even includes an example script showing how it could be done (and how a bit of Javascript can even be inserted).

0 comments voice your opinion now!
remoteaddr httpxforwardedfor remote ip address exploit remoteaddr httpxforwardedfor remote ip address exploit


blog comments powered by Disqus

Similar Posts

Zend Developer Zone: 30 Minutes with Jeremy Johnstone

DevShed: Validating IP Addresses with Filters in PHP 5

Jonathan Street's Blog: When scraping content from the web don't make it obvious

Community News: The Obfuscator

Gareth Heyes' Blog: Exploiting PHP SELF


Community Events

Don't see your event here?
Let us know!


opinion php7 framework configure interview symfony composer yii2 series list community part2 podcast laravel application api example introduction language project

All content copyright, 2015 PHPDeveloper.org :: info@phpdeveloper.org - Powered by the Solar PHP Framework