Does the AR enabled with L2TP support NAT traversal

The AR router does not support H323 NAT traversal

L2TP supports NAT traversal. L2TP uses UDP port 1701, so the destination port must be port 1701 when NATis used.

The L2TP Access Concentrator (LAC) and L2TP Network Server (LNS) support the RADIUS authentication (remote authentication) function to authenticate remote users. PPP sessions are initiated by user devices and received by the LNS. After being authenticated by the LNS, remote users successfully set up PPP sessions with the LNS and can access resources in the enterprise headquarters. As the other endpoint of an L2TP tunnel, the LNS is a peer device of the LAC, and sets up an L2TP tunnel with the LAC. Additionally, the LNS is the logical termination point of a PPP session; therefore, the PPP client (user device) and the LNS establish a virtual point-to-point link. An LAC provides PPP and L2TP processing capabilities on the packet switched network. The LAC establishes an L2TP connection with the LNS based on the user name or domain name in PPP packets so that PPP frames can be transmitted to the LNS.

Starting from V200R002C00SPC200, the device supports this function.

The LAC and LNS support RADIUS authentication (remote authentication) to authenticate remote users. The LNS terminates PPP sessions. After being authenticated by the LNS, remote users successfully set up PPP sessions with the LNS and can access resources in the enterprise headquarters. For L2TP negotiation, the LNS is the peer device of the LAC, and set up an L2TP tunnel with the LAC. Additionally, the LNS is the logical termination point of a PPP session; therefore, the PPP client (user device) and the LNS establish a virtual point-to-point link. An L2TP Access Concentrator (LAC) provides PPP and L2TP processing capabilities on the packet switched network. The LAC establishes an L2TP connection with the L2TP network server (LNS) based on the user name or domain name in PPP packets so that PPP frames can be transmitted to the LNS.