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]

The duplicate entry can be fixed (I think) with a repair or optimize on that table. The menu control sounds new for me..

[wolfyman]

Originally Posted by clearchannel

I only want to check for proxies during registration.

Same here, did you find yoru solution? Anybody?

[TMM-TT]

Originally Posted by wolfyman

Same here, did you find yoru solution? Anybody?

How about moving the plugin from global_start to register_start?

[wolfyman]

Does that do the trick?

What I want is to disallow people on proxies to register, I don't want the script to check any further than that.

I am pretty happy with the alter ego detector hack, and I don't have a problem with people using multiple nicks, I just want to disallow signups that come via a proxy.

[netcommander]

I think this is big hack my board avarage is 400 online user at a lot time any big server can be install this hack ?? and have you see any problem ?
regards

[rohit]

How do i install this, am a newbie. Have download it but cannt find how to add it to the plugin system.

[dmva83]

Go to manage products, then at the bottom click add/import product, then click browse and nav to the .xml file and you're done.

*edit*
I do have a question..I've installed the hack, is that it, install it and it's good to go, nothing to configure?

[Chadi]

Ever since I installed this today I've been getting these kind of errors emailed to me

Database error in vBulletin 3.5.4:

Invalid SQL:
INSERT INTO proxycache (ip, listed, dateline) VALUES ('62.252.64.13', 0, 1149904834);

MySQL Error : Duplicate entry '62.252.64.13' for key 1 Error Number : 1062
Date : Friday, June 9th 2006 @ 09:00:35 PM
Script : http://www.talkjesus.com/private.php
Referrer :
IP Address : 62.252.64.13
Username : bigwhale
Classname : vb_database


Anyone know what's it all about?

[Chadi]

Can someone please help me? I'm getting a few of these errors each day

[hambil]

Nice. Helped my get rid of some slammers. Thanks.