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Article ID: 115471, created on Jan 30, 2013, last review on Jul 14, 2018

  • Applies to:
  • Plesk Automation 11.5


Parallels Plesk Automation (PPA) fails to register a new Service Node:

SSH communication error: Destination Host ( unreachable.

or a failed task can be found in PPA Task Manager:

Failed to install RPMS to host 'Service\_Node\_IP\_Address', /bin/env LANG=C /bin/rpm -U --nodeps --force http://MN\_IP\_Address/tarballs/CentOS/6/x86\_64/YUM/rpm-python-4.8.0-12.el6.x86\_64.rpm:
 STDERR: curl: (7) couldn't connect to host


Network connection between PPA Management Node and Service Node is closed. PPA requires several ports to be opened on Management and Service Nodes. The list of required ports can be found in the following article 


Make sure that ports required for communication between PPA Management Node and Service Node are opened. 

To troubleshoot network connectivity use the following diagnostic utility:

/usr/local/ppa/bin/checkServiceNode --ip <Service_Node_IP_Address>

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