Articles in this section

See more

Could not update license. Make sure connections to ka.plesk.com license server on TCP port 443 are not blocked

Avatar
Vincent Lauton
Updated
Plesk for Linux kb: technical

Symptoms

Unable to install license:

PLESK_ERROR: Make sure connections to ka.plesk.com license server on TCP port 443 are not blocked

Cause

Unclear. ka,plesk.com is accessible from server. Unknown error appear in log:

# tail -fn0 /var/log/plesk/panel.log
[2022-03-18 09:58:34.334] 18447:623490082ef0c ERR [panel] KA Request Failure code: 2 Network failure
...
* Could not resolve host: id-00.kaid.plesk.com; Unknown error
* Closing connection 1

Resolution

Create 3rd-line before applying the solution

Plesk for Linux

  1. Connect to the server via SSH

  2. Restart Plesk services:

    # systemctl restart sw-engine && systemctl restart sw-cp-server

Plesk for Windows
  1. Connect to the server via RDP

  2. Start Plesk Services Monitor from the tray

  3. Select Plesk Management Service under the Plesk Run-Time section

  4. Click Restart

Comments

2 comments

Sort by Date Votes
  • Avatar
    VincentM

    Still getting the error message

    0
  • Avatar
    Nexio Tech

    This happens also if your server only has a IPv6 address.

    ka.plesk.com only has a A record for IPv4.

    0

Please sign in to leave a comment.

Have more questions? Submit a request

Related articles