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Showing posts from September, 2006

New source of DNSBL and ClamAV unofficial DBs

http://www.msrbl.com/

Looks promising.

Unofficial phishing + scam ClamAV database

I'm starting to test this out today: http://www.sanesecurity.com/clamav/index.htm

I hope there won't be too many false positives...

Anyone using them already?

Virtual Private Servers Pitfalls

It didn't take much time until I found pitfalls with VPSs. Today, I got bit by memory problem. My VPS had 128 MB RAM max. Before installing my usual packages, the memory usage was around 20 MB. Nothing! :). But then I installed my packages, forgot to tweak apache to minimize memory requirement. Installed mysql for cacti, configured cacti...

Then, this morning, I realize that many processes were missing on my VPS. Why? I had enabled the yum daily cronjob.... mistake! Do you have an idea of how much memory yum uses? Too much.

Tektonic told me that they stopped selling UM0 packages because of that: too many clients having memory problems. I upgraded my plans to UM1. I'm wondering though... how does Vpslink do with the smallest plan, only 64 MB RAM!

I can't end this post without adding again how much helpful the folks at Tektonic have been up to now.

Virtual Private Servers

Hi,

Time for another knowledge-sharing post.

I recently discovered a very good alternative to shared, reseller, or dedicated hosting: A virtual private server (VPS).

In fact, a VPS is a virtual machine running, with many other virtual machines (VM). There are many packages, but the cheapest are:

Tektonic (Based on Virtuozzo. I own 3 VPS from them. Very, very nice and responsive people. They've been very supportive for me in my beginnings with VPSs.
OpenHosting (Based on linux Vserver, fedora core 4 only for now, interesting utility billing system)
Vpslink (Based on OpenVZ, the open-source version of Virtuozzo, never tried yet)

Tektonic puts limit on outbound bandwidth that can be sometimes harsh. (Unmetered 1 mbps max for the smallest plan (15$/month)). That is more interesting for applications that don't need much outbound traffic (like remote backup, you have an unmetered 100mbps!) or e-mail, which don't really need an instant transfer, but can be problematic for web hosti…

Sendmail milters from SnertSoft

This is just a quick post to encourage people to try SnertSoft's excellent anti-spam milters. If you're running a spam-filtering gateway, you may want to try milter-ahead. It checks at the backend mail server if the user exists before accepting the message.

Milter-sender is also very interesting, it checks for the existence of the sender's e-mail before accepting the message.

Milter-link checks for URL in message bodies againsts URI blacklists. And this one is free! (most are).

All the milters' descriptions are here.

Anthony, the author, is very kind and offers good support. Have a look at his website. There are many other milters that may help you reduce the load on your spam-filtering system and reduce the number of spams that make it to your user's mailbox!