TMG:Change Internal Subnets Procedure

This article explains how to modify the internal subnets of a TMG800 Unit.

The TMG800 unit need to use private internal subnets for communication between internal modules, and between the two units of a TMG800 1+1 system.

1. Resetting the Unit role

Note: If your Unit was just shipped, it does not yet has it's "role" configured, and you can skip to step 2 below.

To change the internal IP addresses of a TMG800 Unit, it's required to reset the Unit's role (Standlone/Primary/Secondary). Once the role is reset, the Web Portal will show steps to re-configure the Unit's Role, and at the same time select the internal Subnets to use.

To reset the Unit's role:

Go to "Hosts" (on the left menu)

Click the "Status" tab

Click on the serial number of the Unit

Select Action "Reset Host Role"

Click "Apply Action"

Refresh the web page until role selection appears

(this can take a minute...)

Click "Continue", answer the questions

Click on "change internal subnets"

Change subnets as required, click "continue"

Click "continue" and "confirm"

Confirmation pages will appear, continue or confirm if you're satisfied with your choices.

Wait until configuration is completed

(This can take a few minutes...)

Login page will be back