I am testing ISPConfig 3 for severals weeks now (installed following the tutorial for Debian 6, bind and courier). Today I encountered a strange issue for the second time in 10 days: the loss of ipv4 connection (with ipv6 still working)! Connection simply restored with
sudo service networking restart
It may not be the fault of ISPConfig of course, however did someone ever had this issue? Moreover I saw nothing relevant in the logs...