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Logwatch: "Connection attempts using mod_proxy" for Apache

I run a tool called logwatch daily on my webserver (Ubuntu 12.04) to let me know if there's anything in my webserver's log files that is worth noting. Over the past week or two, I started seeing a new section under the main "httpd" header for Apache in the logwatch report that I receive each morning, The new section was entitled "Connection attempts using mod_proxy," and it would list a string of IP addresses, the mail server it was trying to connect to via port 25, and the number of connection attempts.

Site Launch

This site launch marks quite a few firsts for me. Although I've worked with the technologies before, this is the first time I've launched a site running memcache, Varnish, and Apache Solr that I've set up myself. For a little bit of context, memcache and Varnish both help boost the performance of websites and web applications. Memcache caches objects in memory to reduce database load, while Varnish is a reverse-proxy HTTP accelerator that essentially caches the contents of webpages, keeping load off of the webserver (in my case, Apache) itself.

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