The Sysadmin’s Daily Grind: Mod_evasive
EVASIVE MANEUVERS
The Apache web server can fight back against DoS attacks. You just need a little help from Mod_evasive.
Every admin knows and hates Denial-of-Service attacks. No matter whether the perpetrator is plain stupid, malevolent, or sick, a massive barrage of incessant requests directed at the server causes the server to freeze and pushes the admin’s adrenalin levels way up. Web servers are most commonly attacked. AEMM gives Apache a self-defense mechanism. The package name “Apache Evasive Maneuvers Module” is too long for many people’s liking, and most admins simply refer to it as Mod_evasive [1] – although this is actually just the name of the AEMM Apache module. Under the hood, Mod_evasive uses a blacklist. The module checks incoming requests against the list to find out if multiple requests of the same type have been received from the same IP in the last few seconds. The threshold values are configurable. At the same time, Mod_evasive checks if the requester has called more than 50 objects in the last second.
Buy this article as PDF
(incl. VAT)
Buy Linux Magazine
US / Canada
UK / Australia
News
-
System76 is Skipping Pop!_OS 22.10
In a move that is sure to raise some eyebrows, System76 has chosen to concentrate on COSMIC Desktop instead of staying in step with Ubuntu releases.
-
System76 Refreshes its Thelio Desktop Computer
System76 has given their already stellar Thelio desktop computer a redesign by way of the chassis accent panel.
-
Ubuntu Software Store Rumored to Replace Gnome Software
An alternative to GNOME Software has been written, using Flutter, and it’s making enough noise that Canonical is rumored to be considering using it as the default.
-
A New Arch-Based Linux Distribution Has Arrived
Crystal Linux is a new distribution with the goal of bringing the power of Arch Linux to the masses.
-
Fedora 37 Beta Available
The Fedora development team announced the beta for version 37 of the open-source operating system would be released on time on September 13, 2022.
-
Salix 15.0 Offers Updates and a Modernized Look
Salix is a Slackware-based Linux distribution with a new look and a goal of being fast, user-friendly, and highly stable.
-
Ubuntu 20.04.5 LTS Release Now Available
The latest point release of the Ubuntu 20.04 LTS distribution is now available and sports kernel 5.15.
-
MX Linux 21.2 Offers Improvements and Bug Fixes
MX Linux 21.2, aka “Wildflower,” is now officially available and is the second refresh of the MX-21 release.
-
Gnome Project Releases New Telemetry Data Collection Tool
The GNOME developers have announced the release of a new tool to collect anonymous information about your system.
-
Kubuntu Focus Announces New Desktop Model
The Kubuntu Focus team has announced their newest system would be a small form factor desktop optimized for Kubuntu 22.04.