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Changing IP Addresses

If you need to update the IP address of your server/sensor to move it to a different area of your network, you need to do a few things:

  • update the actual IP address of the management interface
  • update NSM config files to reflect the new IP address

Update the actual IP address of the management interface

To update the actual IP address of the management interface, you have two options:

  • manually update /etc/network/interfaces

    OR

  • re-run the FIRST phase of Setup (select Yes, configure /etc/network/interfaces)

Update NSM config files to reflect the new IP address

To update NSM config files to reflect the new IP address, you have two options:

  • re-run the SECOND phase of Setup on all server/sensors (wiping all data and config)

    OR

  • manually update the IP address as shown below

Files to update when changing the IP address

Changing Server IP

  • /etc/nsm/HOSTNAME-INTERFACE/http_agent.conf:

    set SERVER_HOST [SERVER-IP]

  • /etc/nsm/HOSTNAME-INTERFACE/pads_agent.conf:

    set SERVER_HOST [SERVER-IP]

  • /etc/nsm/HOSTNAME-INTERFACE/pcap_agent.conf:

    set SERVER_HOST [SERVER-IP]

  • /etc/nsm/HOSTNAME-INTERFACE/sancp_agent.conf:

    set SERVER_HOST [SERVER-IP]

  • /etc/nsm/HOSTNAME-INTERFACE/sensor.conf:

    SENSOR_SERVER_HOST="[SERVER-IP]"

  • /etc/nsm/HOSTNAME-INTERFACE/snort_agent-N.conf:

    set SERVER_HOST [SERVER-IP]

  • /etc/nsm/ossec/ossec_agent.conf:

    set SERVER_HOST [SERVER-IP]

  • /root/.ssh/securityonion_ssh.conf

    SERVERNAME=[SERVER-IP]

  • /etc/salt/minion.d/onionsalt.conf

    master: [SERVER-IP]

Automating the change of the server IP

You may be able to use sed to update all files at once using something like this:

sudo so-stop
sudo sed -i 's|OLD.SERVER.IP.ADDR|NEW.SERVER.IP.ADDR|g' /etc/nsm/*/*agent* /etc/nsm/*/sensor.conf /root/.ssh/securityonion_ssh.conf /etc/salt/minion.d/onionsalt.conf
sudo so-start