User guide

Chapter 4: Configuring Your MultiVOIP GSM

Multi-Tech Systems, Inc. MVPGSM 60

NAT Traversal

Setting the NAT (Network Address Translation) Traversal parameters. STUN (Simple Traversal of UDP through

NATs) is a protocol for assisting devices behind a NAT firewall or router with their packet routing.

Descriptions for NAT Traversal screen fields are presented in the table below.

NAT Traversal Definitions

Field Name Values Description

Enable (STUN) checkbox Enables STUN client functionality in the MultiVOIP GSM.

STUN (Simple Traversal of UDP through NATs (Network Address Translation))

is a protocol that allows a server to assist client gateways behind a NAT

firewall or router with their packet routing.

Name/IP (Server) n.n.n.n IP address of the STUN server.

Port (Server;

NAT/STUN)

number The data port (TDM time slot) at which STUN info will be transmitted and

received. Default is 3478

Keep Alive (Timers;

NAT/STUN)

–

3600

(seconds)

“Keep Alive” packets to the STUN server to retain the binding / connection

with the STUN server. This is the interval at which the STUN client sends

indicator packets to the STUN server to determine whether or not the STUN

server is available.