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Learned something new today: hairpin nat (with iptables on linux)

So I was trying to set up a service that should be accessible from the internet and locally (under the same Domain name and in a different subnet as the internal hosts for security reasons).

"Network is unreachable" error - Gentoo, silly netifrc configuration mistake

So on a new install I was just sitting there and wondering .. what did I do wrong .. why do I keep getting those errors:

Roundcube (Webmail) "loosing" all user settings and contacts

So I had been wondering why my roundcube had lost all the contacts and settings for my users (I changed DB host after  a server outage - see my older post).

openvpn client on raspberry PI

Needing OpenVPN on my raspberry PI caused me to have some .. unexpected issues. But first a very quick run-down on what I did:

UCS (Univention Corporate Server) Nagios NRPE Command ... not defined

So I had errors in my nagios for UCS for the backup domain server and fileserver (after an upgrade probably):