Article ID: 119950, created on Feb 1, 2014, last review on Sep 25, 2016

  • Applies to:
  • Plesk 12.5 for Linux
  • Plesk 12.0 for Linux
  • Plesk 11.0 for Linux
  • Plesk 11.5 for Linux
  • Plesk 12.5 for Windows
  • Plesk 12.0 for Windows


Website, and/or webmail, and/or webadmin are not accessible.

  • Firefox: Server not found
  • Opera: Could not locate remote server
  • Internet Explorer: Internet Explorer cannot display the webpage or shows This page can’t be displayed message
  • Google Chrome: This webpage is not available


  • The domain is not registered
  • DNS servers are not specified for the domain
  • DNS servers are specified but not configured
  • Domain is resolved to IP address not available in Internet, or hosting is not configured on this IP address.
  • Firewall blocks inbound connections to 80 or 443 ports


  1. Check if the domain is registered:

    # whois 
    No match for domain "".
    No whois server is known for this kind of object.

    So this domain is not registered. It is required to register it before usage.

  2. Check DNS servers of this domain:

    # whois
    Name Server: A.NS.EXAMPLE.COM
    Name Server: B.NS.EXAMPLE.COM

    If Name Servers are not specified, it is required to add them at registrar.

  3. Check if DNS servers are configured for the domain or not:

    # nslookup A.NS.EXAMPLE.COM

    If DNS servers are not configured it is required to set IP address for the domain.

  4. Check if hosting server is configured on the domain resolved IP address:

    Web service should be available at tcp ports 80 or 443 for https:

    # telnet 80
    Connected to
    Escape character is '^]'.

    This command verifies if connection to web server can be established. If no, then web hosting service is not running on the host or firewall blocks inbound connections at tcp port 80 on the server. Add firewall rule to allow connection to 80 and 443 ports:

    # iptables -I INPUT 1 -p tcp --dport 80 -j ACCEPT 
    # iptables -I INPUT 2 -p tcp --dport 443 -j ACCEPT
  5. Ensure that website, and/or webmail, and/or webadmin is actually accessible by adding record in the 'hosts' file and trying to access web service afterwards. For example:

    On Windows:

    C:>\ findstr "%windir%\system32\drivers\etc\hosts" 

    On Linux:

    # grep /etc/hosts  

    Do not forget to remove record from the hosts file afterwards.

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