Again, Knowing full well this version is not supported yet, and release is a short time away: Using the information at https://www.3cx.com/blog/docs/linux-version-9-stretch/ I Installed 3CX on a fresh install of Debian 9.1. Imagine my surprise when it installed without a burp or complaint. Previously I had sent my router to serve out a constant IP of 192.168.1.250 root@debian:/home/larry# ip addr 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether d8:50:e6:d2:8a:36 brd ff:ff:ff:ff:ff:ff inet 192.168.1.250/24 brd 192.168.1.255 scope global dynamic eno1 valid_lft 85220sec preferred_lft 85220sec inet6 fe80::da50:e6ff:fed2:8a36/64 scope link valid_lft forever preferred_lft forever So I told 3CX on installation that the eno1 address was 192.168.1.250. This seemed to work just fine. I got the message ": Congratulations your 3CX installation is ready. You can access the 3CX Management Console at: ..... And this is where the Hiccups began. Using https://"FQDN".3cx.us:5001 failed with a message Firefox cant establish a connection. Using https://"IPaddress":5001 fails with the same Firefox message Unable to connect. The information box says the connection is not secure. Using http://"IPaddress":5001 fails with the same messages. Using http://localhost:5001 got me a 400 Bad Request. Plain http request sent to HTTPS port. Using Https://localhost:5001 got me Your Connection is not secure. The owner has not configured their website correctly. To protect you, Firefox has not connected to this site. Suddenly I see and "Advanced" Button.Clicking this gets me Localhost:5001 used an invalid security certificate. This certificate is only valid for "FQDN".3cx.us Err code SSL_ERROR_BAD_CERT_DOMAIN. Progress. Which is probably what I deserve. Clicking on "Add Exception" in Firefox allows Firefox to override the Certificate error. And suddenly I'm into the 3CX Management Console. Which is when I notice there is no 3CX Soft Phone. Which is like the queen having no jewels. I think this means I can't use the program until its ready for release! or I figure out how to use another softphone. A minor point of Human Factors. There is a very very slight hint the cursor and input is active in the name and password boxes. I missed it the first few times. Keep in mind I am a novice at this stuff. I could be doing something dumb and not realize it.