So, I have CentOS 6 and everything work great. But after few hour some time 1 day IPSConfig is not avaliable anymore though all other services are working great. I get "Server doesn't respond" message at browser. In fact I use non standard port for IPSConfig. It's not 8080. And I use SSL connection only. After rebooting server ISPConfig is available with out any problem. Is there any critical service which could stop itself and it's dependence to be workable IPSConfig? And what I should check when IPSConfig doesn't opens. Thanks.