Issue WHMCS and Plesk connection

[NicolasP.]

Server operating system version

Ubuntu 20.04.5 LTS

Plesk version and microupdate number

18.0.47 #2

Hello.

I have an issue connecting whmcs with Plesk. It was working fine but suddenly something happened and it stopped working.

I checked credentials and 8443 port and all looks ok.

I get the following message when I test the connection
`Error code: 0. Error message: Curl error: [7] Failed to connect to 116.xxx.xxx.xxx port 8443: Connection refused.`

And this error on Plesk when I click "Login to Cotrol Panel"
`An Error Occurred. A fatal error occurred. Please see activity log for more details.`

Any ideas?

 

[MarkM]

Assuming the credentials haven't changed, it's likely a firewall issue if I had to take a guess. Check your WHMCS server and make sure outgoing 8443 is open.

 

[NicolasP.]

Assuming the credentials haven't changed, it's likely a firewall issue if I had to take a guess. Check your WHMCS server and make sure outgoing 8443 is open.

Credentials haven't changed! I checked them several times.
I didn't check if outgoing 8443 is open tbh but why when you try to Login to Plesk doesn't work either?
It's a redirect to plesk and not an API call if I am not wrong.

 

[michael@235travelstop]

I struggled with this for hours, exact same problem. here was my solution.

enter 443 in the "Access Hash" box of the server settings page, make sure that you have checked "Check to use SSL Mode for Connections"

test connection....

this works!

 

[The 8th]

I struggled with this for hours, exact same problem. here was my solution.

enter 443 in the "Access Hash" box of the server settings page, make sure that you have checked "Check to use SSL Mode for Connections"

test connection....

this works!

Shall I remove Hash and enter 443 ?

 

[The 8th]

I have this issue since i updated WHMCS

 

[The 8th]

OK i solved, i just removed hash and port and its works.