CRITICAL | sd-XXXX.host.net | (Return code of 255 is out of bounds)

So!,

My nagios was returning a CRITICAL error on one of my servers…

CRITICAL | sd-XXXX.host.net | (Return code of 255 is out of bounds)

and httpd server wasn’t responding….

I think that problem was on IPTABLES / FAIL2BAN ban list. I had 702 banned IPs…
After I clean them up, everything went okay!

captura-de-ecra%cc%83-2016-11-21-as-19-11-52

I was playing hard with them… my bantime was 3600000 (41d) and my findtime was 60000 (16h)…

 

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