TMG:Change Internal Subnets Procedure

This article explains how to modify the internal subnets of a TMG800, TMG3200 or TMG7800 Unit.

Click here for more information on internal subnets of TMG Units

Resetting the Unit role

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

Changing the internal IP addresses of a TMG requires 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...)

Configure the Unit's Role

Click "Continue", answer the questions

Change Unit's internal subnets

Click on "change internal subnets"

Change subnets as required, click "continue"

Note: You may not see some of the options in the above screenshot. Only options available for current product are shown on this page.

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