Hello, I am newbie of ISPConfig, I have setup client Namecheap A record point to ISPConfig IP address, and then try https://www.abc.com:8080, but no response. Remember I can use my own domain to login. Thanks
You should be able to use any domain that points to your server to login to ispconfig as the interface uses a port based vhosts, this means that it is reachable trough any IP or domain of the server. The most likely reason for the probem is that the domain does not point to the right server yet.