The art of responding to incidents in an organized and thoughtful manner.

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attack on Unix procmail analysis

2 days ago I received the following E-mail (this is its original format not the one of any mailer, but where sensitive information is replaced by ••field_name••): From qqqqqq@freemail.net Thu Jul ...
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Is it suspicious that mail server sends traffic to Tor Exit node?

I am monitoring the outbound traffic from mail server through IDS and recently I observed there were some traffic sending to Tor Exit nodes from mail server, for example, IP 46.183.85.124. After doing ...
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SSH attempt blocked now ECDSA keys changed

Last night I had an external IP tried to access my server over SSH. The attempt was blocked as it failed to authorise in the number of times and time limit that I'd specified. Doing a whois on the ip ...