Inspecting my logs recently, I found that there were some strange requests to my Postfix mail server from user www-data. Now any sysadmin could tell you what www-data means but this does not really explain where exactly the requests came from. So I just copied the log files for my mail server and all the websites I run and grep’ed the relevant log entries to match the requests to Postfix with requests to Apache. Although I had first argued it might be one of the scripts included in the blog, forum and CMS software on my server, it turned out to be the script which is (i.e. was!) used as the backend of my contact form. Continue reading
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