Tau

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tau is one of our webservers which hosts zinc12, zinc15, irwinlab, and dude18

slowloris mitigation

A slowloris attacker is causing websites hosted on the tau webserver to get hung up and connection timeout. ZINC12, ZINC15, irwinlab, and dude18 all hung during this time. I've determined this is due to a slowloris attack judging by the fact that /var/log/httpd/error_log displays the MaxClients value has been maxed out and that tau.compbio.ucsf.edu/server-status shows every single server socket getting occupied by a '..reading..' value.

https://ma.ttias.be/effectively-using-detecting-the-slowloris-http-dos-tool/