Testing the network settings of the operating system of a node

Before you change the address of the node in Kaspersky Secure Mail Gateway, it is recommended to make sure the new network settings of the operating system have been applied.

To test the network settings of the operating system of a cluster node:

1. In Technical Support Mode, connect to the node using the new IP address.
2. Check if the current network settings of the operating system match the settings that you have specified in the steps of the wizard. To view and check the settings of the operating system, use the following commands:
   • To test the network adapter settings:

     ip address

   • To test the default route and static route:

     ip route

   • To test the DNS server settings:

     cat /etc/resolv.conf

3. Make sure the DNS server has a record for the new domain name of the node:

   host <domain name of the node>

   If the record for the domain name of the node is not found on the DNS server, check if the network settings are specified correctly. If necessary, modify the network settings of the operating system.

4. If necessary, change the domain name of the host:

   hostnamectl set-hostname <new domain name of the host>

5. Check if the new domain name is in fact assigned to the host:

   hostnamectl status

   The output includes the line static hostname with the assigned domain name of the cluster node.

As a result, the network settings of the operating system on node are tested.