ArtDio IPS 1000 - Manual (Page 27)

IPS 1000 Series VoIP Gateway
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10.5. Configure STUN
The STUN (Simple Traversal UDP through NAT) server is an implementation of the STUN protocol that
enables STUN functionality in SIP-based systems. The STUN server also includes a client API to enable
STUN functionality in SIP endpoints.
STUN is an application-layer protocol that can determine the public IP and nature of a NAT device that
sits between the STUN client and STUN server.
Notice: If your gateway is behind NAT (Use Private IP), must configure the parameter.
After configuring the parameters of STUN, please act Warm-Restart.
Configuration
WEB Page: ADVANCED\STUN
You can enable and disable the service on WEB page.
The STUN refresh time defines how long the device will send a binding request packet with discard flag
on to STUN server. A binding packet with discard flag off will be sent each time when the number of
binding request packet with discard flag on reach the Rebinding counts. The binding request packet is
used to let the STUN server keep the most fresh client information.