DNSBL/Open Proxy-Blocking

History

I've had some problems with abuse via open proxies for a time ago, and when we were banning abusers, they always found a new proxy to use and register new accounts with. Since this forum was a large type we could'nt just ban e-mails etc just like that, because this was leading to a very large amount of other banned users too.

At IRC, in the other hand, we had Open Proxy Monitors, that was banning everything that was blacklisted in some DNSBL-databases. No spammers had a chance to get in there as long they were listed in such database.

This is a plugin that blocks blacklisted hosts from some different DNSBL's. It uses the global_start-hook, a very simple handler for blocking proxies, and a vBphrase called OPM_Deny.


April 2006

The source has been rewritten a bit. The proxychecker is now using a cache that, by default, stores all ip's in a database for 6 hours. It scans some DNSBL's and can be configured to block proxies from bitmasks (defined in the plugin) which makes it a little bit more reliable, because it does'nt block everything it see).

Configuration is made from the plugin (hopefully there will be a nice admin interface in the future). Exceptions (ip's that can pass through this system even if it is a proxy) are also handled differently now.

// CHANGES
//
// 2008-09-20 (2.0.8)
//
// * Changed the routines for how to handle inclusion/exclusions
// * Splitted up plugins for 3.5/3.6 and 3.7
//
// 2007-08-05
//
// * Fixed reported bug, based on resolved hosts ending with 127
// * Changed database-tables to get rid of (hopefully) duplicate keys
// * Added resolver-function
// * Added two new block-methods available at the efnet-rbl
//
// 2006-06-28 (2.0.6/Another fix)
//
// * Proxyinclusions/exclusions didn't work properly
//
// 2006-06-28 (2.0.5/Fix only)
//
// * Fixed a bug in the $block-array that affected some of the blocking results
//
// 2006-06-28 (2.0.4)
//
// * opm.tornevall.org has a new entry for anonymizers, added support for this
// * Default value on "block everything detected" in plugin changed to "no"
//
// 2006-06-26 (2.0.3)
//
// * Created options for admincp (removed plugin-configuration)
// * Fixed a bit-bug for njabl
// * Plugin is now a function (rbl_livecheck) for external lookups
// * Added options for "only block on newuser-registrations"
//
// 2006-06-22 (2.0.3 RC)
//
// * The monitor is now a function
// * Added small compatibility with other plugins (with return)
//
// 2006-05-13
//
// * sorbs zones added (no bitmasking)
// * opm.blitzed.org removed
// * time() changed to TIMENOW
//
// 2006-04-21
// ==========
//
// * proxyinclusions
// quickly add own hosts that should be treated as a proxy
//


How does it work with other vBulletins?

This filter actually works with both 3.5 and 3.6, but for now, they will be separate versions, but for 3.5 and 3.6 you should look here and for 3.7 you should look here.


How to use the compatibility thing

If you have a plugin that you want to use together with the proxy monitor (only returns a value if a an ip-address is registered as a proxy or not) you can call the function rbl_livecheck like this (example):

PHP Code:

global $rblInstalled;

if ($rblInstalled) {
$remoteIsProxy = rbl_livecheck(1, $_SERVER['REMOTE_ADDR']);

//
// .. your code here ..
//

} 


Report bugs if you find them...



Don't forget to install it

[TMM-TT]

Added to version 2.0.1:

// CHANGES
//
// 2006-04-21
// ==========
//
// * proxyinclusions
// quickly add own hosts that should be treated as a proxy

[aeroguy]

could this mod be modded so it only checks new registering users? is it just a case of replacing the hookname with register_start instead of global start?

[aeroguy]

Also how would i go about adding sorbs.net to the list?

[HuangA]

I'm looking at the 2.0.1 plugin code, and I noticed that you did this:

// Right now
$timestamp = time();

My I ask why are we creating a new variable instead of using the default one defined in the initializer (./includes/init.php ~line30)?

define('TIMENOW', time());

Surely its not by a whole lot individually, but I'm sure it'd save some resources to use the already defined static value than creating a new one each time?

[darksoulz]

opm.blitzed.org needs to removed from the default list, as it is no longer in operation.

http://lists.blitzed.org/pipermail/o...q2/000015.html

[TMM-TT]

Originally Posted by darksoulz

opm.blitzed.org needs to removed from the default list, as it is no longer in operation.

http://lists.blitzed.org/pipermail/o...q2/000015.html

Thanks!

Here we go -

// 2006-05-13
//
// * sorbs zones added (no bitmasking)
// * opm.blitzed.org removed
// * time() changed to TIMENOW

[kofoid]

Is this supposed to work with Public Proxies? I am testing it on my site and it doesn't seem to....

[Binoy]

if it works properly.. it ll be one of the best xml product i´m adding

thanx a lot buddy..

gr8

[JD45]

I'm getting this sql error for some reason:

Invalid SQL:
INSERT INTO vb_proxycache (ip, listed, dateline) VALUES ('165.138.192.9', 0, 1147712488);
MySQL Error  : Duplicate entry '165.138.192.9' for key 1

[JD45]

and for me this is incompatible with menu control 1.3 and hit coutner hacks