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Search results for Configuring the Behavior of the Solaris IP Filter Firewall

OpenBSD

Failover Firewalls with OpenBSD and CARP

Post date: April 28, 2005, 02:04 Category: Network Views: 7589 Comments
Tutorial quote: Firewalls are a required component in commercial and residential computer networks. For many installations, the firewall is a single point of failure between client systems and external resources. It can also become a liability when hardware or applications fail, leaving potential customers unable to reach your servers. A properly designed and executed failover configuration for your primary firewall will address many of these concerns. This article introduces a proven method for installing redundant stateful firewalls using native OpenBSD features.
Ubuntu

Postfix Spam Filter using Ubuntu Dapper, MailScanner and ClamAV(beta)

Post date: July 16, 2006, 16:07 Category: Network Views: 5959 Comments
Tutorial quote: This is a similar version of the HOWTO that can be found here: http://www200.pair.com/mecham/spam/spamfilter20050628.html. Except for using Ubuntu Server instead of Debian and MailScanner instead of Amavisd, the Postfix, Rayzor, Pyzor, DCC and ClamAV sections are almost the same.
Unix+clones

Configuring Apache for Maximum Performance

Post date: February 12, 2006, 09:02 Category: Optimizing Views: 3798 Comments
Tutorial quote: Apache is an open-source HTTP server implementation. It is the most popular web server on the Internet; the December 2005 Web Server Survey conducted by Netcraft [1] shows that about 70% of the web sites on Internet are using Apache.

Apache server performance can be improved by adding additional hardware resources such as RAM, faster CPU, etc. But most of the time, the same result can be achieved by custom configuration of the server. This article looks into getting maximum performance out of Apache with the existing hardware resources, specifically on Linux systems. Of course, it is assumed that there is enough hardware resources - especially enough RAM that the server isn't swapping frequently. First two sections look into various Compile-Time and Run-Time configuration options. The Run-Time section assumes that Apache is compiled with prefork MPM. HTTP compression and caching is discussed next. Finally, using separate servers for serving static and dynamic contents is covered. Basic knowledge of compiling and configuring Apache and Linux are assumed.
Solaris

Enforcing a Two Man Rule Using Solaris 10 RBAC

Post date: April 28, 2005, 02:04 Category: Security Views: 4482 Comments
Tutorial quote: The "two man rule" (also sometimes called the "four eyes rule") has its origins in military protocol although for quite some time it has been welcomed into the stockpile of IT security controls used by organizations around the world. The "two man rule" specifies that there must be two individuals that must act in concert in order to perform some action.
Debian

Adding Disclaimers To Outgoing Emails With alterMIME (Postfix On Debian Lenny)

Post date: September 21, 2010, 18:09 Category: Installing Views: 8989 Comments
Tutorial quote: This tutorial shows how to install and use alterMIME. alterMIME is a tool that can automatically add a disclaimer to emails. In this article I will explain how to install it as a Postfix filter on Debian Lenny.
Linux

Configuring sudo and adding users to Wheel group

Post date: December 5, 2008, 12:12 Category: Security Views: 3445 Comments
Tutorial quote: f a server needs to be administered by a number of people it is normally not a good idea for them all to use the root account. This is because it becomes difficult to determine exactly who did what, when and where if everyone logs in with the same credentials. The sudo utility was designed to overcome this difficulty.
Ubuntu

Installing and configuring FireHOL - Part 2

Post date: September 20, 2006, 22:09 Category: Network Views: 7177 Comments
Tutorial quote: This is the second part of the introduction to FireHOL article. It covers more advanced topics that you might find useful, such as defining new services, selective filtering, and NAT. Everything is explained in a very detailed fashion.
Fedora

How To Back Up Your Files With Areca On Fedora 9

Post date: June 1, 2008, 08:06 Category: Miscellaneous Views: 4035 Comments
Tutorial quote: Areca is a personal file backup software developed in Java. It allows you to select files or directories to back up, filter, encrypt and compress their content, and store them on your backup location. Areca supports incremental backups and generates backup reports, which can be stored on your disk or sent by email. This guide explains how to install and use it on a Fedora 9 desktop (GNOME).
Debian

Filtering PDF-/XLS-/Image-Spam With ClamAV (And ISPConfig) On Debian/Ubuntu

Post date: July 24, 2007, 02:07 Category: Security Views: 3269 Comments
Tutorial quote: There is currently a lot of spam where the spam information is attached as .pdf or .xls files, sometime also hidden inside a .zip file. While these spam mails are not easy to catch with e.g. SpamAssassin or a Bayes filter, the ClamAV virus scanner can catch them easily when it is fed with the correct signatures as ClamAV is built to scan mail attachments.
Openfiler

Installing and Configuring Openfiler with DRBD and Heartbeat

Post date: October 26, 2008, 13:10 Category: Installing Views: 11382 Comments
Tutorial quote: Openfiler is a high performance operating system tailored for use as a SAN/NAS appliance. This configuration will enable two Openfiler appliances to work in an active/passive high availability scenario.
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