Plesk-hosted website shows wrong content

Symptoms

• Website shows wrong content.

• Domain resolves into IP address that is missing from Plesk server:

  # dig +short example.com
  203.0.113.2

  # dig +short -t AAAA example.com
  2001:0db8:85a3:0000:0000:8a2e:0370:7334

  or domain resolves into several IPs at once:

  # dig +short example.com
  203.0.113.2
  203.0.113.3

• If Wordpress is installed for the website the following error message appear when trying to log in to WordPress admin panel:

  CONFIG_TEXT: Unknown username. Check again or try your email address.

  OR

  CONFIG_TEXT: Unknown email address. Check again or try your username

Cause

IP Address assigned to domain in Plesk doesn't match the address specified in A-record or AAAA-record on name server side.

Note: by default OS prefers IPv6 (AAAA) over IPv4 (A) address.

Resolution

1. Log in to Plesk

2. Go to Domains > example.com and identify IP address assigned to the domain:

   

3. Go to Domains > example.com > DNS Settings and specify the identified IP address for all DNS records

   Note: if external name server is used, the IP address should be specified there.

4. Wait until DNS propagation is finished. It can take up to 24-48 hours. Contact registrar company in case of propagation issues.