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	<title>REMSYS technical resources</title>
	<link>http://www.rslab.net</link>
	<description>technical articles, howtos</description>
	<lastBuildDate>Tue, 24 Aug 2010 10:55:21 +0000</lastBuildDate>
	<docs>http://backend.userland.com/rss092</docs>
	<language>en</language>
	
	<item>
		<title>Security audits</title>
		<description><![CDATA[[Introduction]
Please note that this article is about practical side of security audit.
You can easily find many teoretical materials on this subject (for example at wikipedia http://en.wikipedia.org/wiki/Information_technology_security_audit).
One of our customers asked us to make a security audit of his server. He had suspicions that his system has been compromised (this indirectly has been confirmed by the [...]]]></description>
		<link>http://www.rslab.net/2010/08/security-audits94/</link>
			</item>
	<item>
		<title>Fail-safe Master-master MySQL replication</title>
		<description><![CDATA[Reference:
http://dev.mysql.com/doc/refman/5.0/en/server-system-variables.html
Assumptions:

Server1 IP: 10.1.1.1
Server2 IP: 10.1.1.2
We will completely replicate all databases
Servers are not in production yet. If they are &#8211; be careful when rsyncing data

Notes:

This setup can be used in HA environments, provided that only one of the servers is used for writes (INSERTs, UPDATEs, DELETEs) at a given moment
In case one of the servers crashes, [...]]]></description>
		<link>http://www.rslab.net/2010/06/fail-safe-master-master-mysql-replication/</link>
			</item>
	<item>
		<title>Referral Whois and ARIN&#8217;s rwhoisd</title>
		<description><![CDATA[Without strict standards, the internet would be just a bunch of interconnected networks, and finding valid information about some specific resource would be next to impossible.
The most simple example (not directly related to the Internet or IT, but illustrating the main idea):
Imagine the modern telephone system. Each country has it&#8217;s own area code, each state/district/region [...]]]></description>
		<link>http://www.rslab.net/2010/06/referral-whois-and-arins-rwhoisd/</link>
			</item>
	<item>
		<title>Things to know about file hosting services</title>
		<description><![CDATA[What to account for when starting a file hosting platform
*The following article is in no way a complete &#8220;HOWTO&#8221; on designing and implementing a file hosting platform. It is to be taken as a series of recommendations on the subject*


First of all, we need fast storage servers.

One would think that a few bulky servers with [...]]]></description>
		<link>http://www.rslab.net/2010/03/things-to-know-about-file-hosting-services/</link>
			</item>
	<item>
		<title>Service high availability using open-source tools</title>
		<description><![CDATA[People want their servers, and of course the projects that are running on them, to be available all the time, and to bring maximum revenue at the same time.
In a real-life situation, it is more than clear that pure 100% availability is impossible to achieve, especially if a single hardware device is involved. There can [...]]]></description>
		<link>http://www.rslab.net/2010/03/service-high-availability-using-open-source-tools/</link>
			</item>
	<item>
		<title>Configuring DSR on the Alteon load balancers</title>
		<description><![CDATA[This article is covering the configuration of the DSR load balancing mode  on the Alteon load balancers running WebOS 10 and a couple of Linux systems acting  as real servers. 
Alteon 180/184 series load balancers is a cheap solution to handle at least 1 Gigabit of load balanced web traffic, when using DSR.

As per Wikipedia, [...]]]></description>
		<link>http://www.rslab.net/2009/04/configuring-dsr-on-the-alteon-load-balancers/</link>
			</item>
	<item>
		<title>RSMail Mail Server Management</title>
		<description><![CDATA[RSMail is a complete mail server management software.
People can easily manage their mail server, POP3/IMAP server, configure spam filters and antivirus protection in its web based interface.
We created a small page with several screenshots, for people interested in its actual state.
]]></description>
		<link>http://www.rslab.net/2008/10/rsmail-mail-server-management/</link>
			</item>
	<item>
		<title>Apache system activity report (asar)</title>
		<description><![CDATA[One of our customers asked to made a script which will suspend his hosting customers if they are using too much resources.
The goal was to collect cpu usage by
1. apache and mod_php
2. mysql
3. cgi/daemons
4. mail
The tool will get actual resource usage every 5 minutes and save the data in a dbm database.
Actually we started with [...]]]></description>
		<link>http://www.rslab.net/2008/08/apache-system-activity-report-asar/</link>
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