System
A collection of articles relating to server-side tools and Apache modules. We mostly use a standard LAPP (Linux, Apache, PostgreSQL, PHP) installation hosted on Debian/GNU Linux. Most details will apply also to other systems, though some file paths will differ.
Articles relating to Server-side
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- Monitoring the fail2ban log
- Controlling what logs where with rsyslog.conf
- Optimising your Fail2Ban filters
- Adding a watermark using ImageMagick
- Logging sFTP activity for chrooted users
- Access authorization in Apache 2.4
- Setting CRON in a different time zone
- xferlog - ProFTPD server logfile
- Emulating an HTTP/1.1 Request using Telnet
- Using a Fail2Ban Jail to Whitelist a User
- IPv6 Networking and DAD
- cron-apt update notification and security upgrades in Wheezy
- Using qtool.pl to manage sendmail queues
- Calculating Subnets
- mod_rewrite: Examples
- Authenticating Apache Logins with PostgreSQL
- Web Server Attacks and Exploits
- Identifying unused resources with inotifywait
- fail2ban and sendmail
- Implementing Port Knocking with knockd
- Fail2Ban 0.8.3 Howto
- Apache Request and Response Headers
- Expanding IPv6 Addresses for DNSBL Checks
- Analysing mailq and the mqueue directory
- Apache mod_pagespeed issues
- Generating a Certificate Signing Request (CSR)
- Blocking FTP Hacking Attempts
- mod_rewrite: Seach Engine Friendly URL's
- Analyzing Apache Log Files
- Apache mod_pagespeed settings
- Safari 3 Breaks HTTP Authentication
- Accessing Public IP address from behind NAT
- Blocking Fake Googlebot and bingbot spiders
- Avoiding duplicate content filters
- Blocking Unwanted Spiders and Scrapers
- Searchable Directory of User Agents
- fail2ban and iptables
- Apache authorization with dynamic DNS
- HTTP Server Status Codes
- Re-naming vhost files to *.conf for Apache 2.4
- Referer Spam from Microsoft Bing
- Webalizer Numbers Explained
- Safari 5.1 Breaks Basic Authentication
- Analysing the mail.log
- Bash script to generate broken links report
- DKIM Key Pair Generator
- Using mod_rewrite to canonicalize and secure your domain
- procmail
- Referer Spam from Live Search
- New Apache instance with Reverse Proxy
- Fighting Form Spammers
- Fake Traffic from AVG
- Saving bandwidth with mod_rewrite and ImageMagick
- Using systemd to bind fail2ban to nftables
- Moving munin stats to tmpfs
- WWW Hacker Activity
- Integrating resolvconf and pdnsd