Customized IE removal

One can now configure the GPRS tunneling protocol (GTP) firewall to remove specific information elements (IE) using the user-configured IE number. When one configures the IE-removal, the GTP firewall deletes the corresponding IEs of the GTPv1 messages; updates the length of the GTP, the UDP, and the IP; and then passes the GTPv1 message. The GTP firewall also updates the cyclic redundancy check (CRC) code.