can not access Plesk control panel on 8443

[Spencer]

Simplest solution for you'd be then to contact your ISP and ask them to allow connections on 8443 port for Plesk control panel server, for accessing Plesk control panel. Your ISP may deny for the same, so what should you do now?

You can try this way to access the Plesk control panel at standard SSL https://plesk.yourdomain.com address to 443 port instead of 8443.

NOTE: Do not disable 8443 port on Plesk control panel configuration. Here you can configure Plesk control panel to listen other ports along with standard 8443. Some of applications such as Dr. web, watchdog, API and others require Plesk to be on 8443 port for proper functioning.

Let me explain this approach with following example,

Lets consider your server is binded with multiple IPs on it.

192.168.10.25
192.168.10.26
192.168.10.27

and now you're planning to access Plesk control panel by https://192.168.10.25

So make the following changes on the Server which are necessary.

1) 'A' record of plesk.yourdomain.com should resolve to 192.168.10.25 IP.

2) Login to Windows 2003 Server via RDP, locate <DriveLetter>:\Parallels\Plesk\admin\conf\httpd.co nf file

Find and comment out the line:
Listen 443

3) Now you will need to add following lines for all IPs excluding 192.168.10.25 IP

Listen 192.168.10.26
Listen 192.168.10.27

4) Now requirement is

Listen 8443
Listen 8880
Listen 192.168.10.25:443

5) In the same file <DriveLetter>:\Parallels\Plesk\admin\conf\httpd.co nf, Locate 8443 VirtualHost definition:

#<VirtualHost *:8443>

And change it to

<VirtualHost *:8443 \
192.168.10.25:443>

6) Under same file find :

ErrorDocument 400 https://plesk.yourdomain.com:8443

and change it to:
ErrorDocument 400 https://plesk.yourdomain.com

7) Last but very important task, restart Plesk control panel services, and see the result....

Now You'd be able to access Plesk CP https://plesk.yourdomain.com via this link, even if your ISP is blocking 8443 port.