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.

• Apache log files: grep, awk and other commands
  • Analyzing Apache Log Files
  • Blocking Unwanted Spiders and Scrapers
  • Referer Spam from Live Search
  • Referer Spam from Microsoft Bing
  • Fake Traffic from AVG
• Understanding web server reports:
  • HTTP Server Status Codes
  • Webalizer Numbers Explained
  • Searchable Directory of User Agents
• mod_rewrite:
  • mod_rewrite: Examples
  • mod_rewrite: Seach Engine Friendly URL's
  • Avoiding duplicate content filters
  • Saving bandwidth with mod_rewrite and ImageMagick
• mod_pagespeed:
  • Apache mod_pagespeed settings
  • Apache mod_pagespeed issues
• Security:
  • Generating a Certificate Signing Request (CSR)
  • WWW Hacker Activity
  • Web Server Attacks and Exploits
  • Fail2Ban 0.8.3 Howto
  • fail2ban and iptables - blocking ssh attacks
  • fail2ban and sendmail
  • Monitoring the fail2ban log
  • Fighting Form Spammers
  • Accessing Public IP address from behind NAT
• Safari Browser bugs:
  • Safari 3 Breaks HTTP Authentication
  • Safari 5.1 Breaks Basic Authentication
• Analysing mailq and the mqueue directory
• Calculating Subnets
• procmail - examples
• xferlog - ProFTPD server logfile
• Apache Request and Response Headers
• Emulating an HTTP/1.1 Request using Telnet

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