Use the following command to configure GTP anti-overbilling for traffic accepted by a GTP profile:
config firewall gtp
set addr-notify <ip-address>
set port-notify <port-number>
set interface-notify <interface-name>
set context-id <context-id>
add-notify the IP address of your Gi or SGi firewall.
port-notify the port number used by the Gi or SGi firewall for anti-overbilling communication. The range is 0 to 65535. The default port is 21123.
interface-notify select the interface through with FortiOS Carrier communicates with the Gi or SGi firewall.
context-id the context ID of the network. This ID must match the ID entered on the Gi or SGi firewall. The default is 696.
From the GUI:
- To add anti-overbilling to a GTP profile, open Anti-Overbilling.
- Add your network's Gi Firewall IP Address and the Port number that it uses (default 21123).
- Select the Interface through which FortiOS Carrier communicates with the Gi firewall.
- Enter your network's Security Context ID (default 696). This ID must match the ID entered on the server Gi firewall.