Cisco Systems SPA9000 manual NAT Support Parameters

Chapter 6 SPA9000 Field Reference

SIP Tab

NAT Support Parameters

Field	Description
Handle VIA received	If you select yes, the SPA9000 processes the received parameter in the VIA header (this
	is inserted by the server in a response to anyone of its requests). If you select no, the
	parameter is ignored. Select yes or no from the drop-down menu.
	The default is no.
Handle VIA rport	If you select yes, the SPA9000 processes the rport parameter in the VIA header (this is
	inserted by the server in a response to anyone of its requests). If you select no, the
	parameter is ignored. Select yes or no from the drop-down menu.
	The default is no.
Insert VIA received	Inserts the received parameter into the VIA header of SIP responses if the received-from
	IP and VIA sent-by IP values differ. Select yes or no from the drop-down menu.
	The default is no.
Insert VIA rport	Inserts the rport parameter into the VIA header of SIP responses if the received-from IP
	and VIA sent-by IP values differ. Select yes or no from the drop-down menu.
	The default is no.
Substitute VIA Addr	Lets you use NAT-mapped IP:port values in the VIA header. Select yes or no from the
	drop-down menu.
	The default is no.
Send Resp To Src Port	Sends responses to the request source port instead of the VIA sent-by port. Select yes or
	no from the drop-down menu.
	The default is no.
STUN Enable	Enables the use of STUN to discover NAT mapping. Select yes or no from the drop-down
	menu.
	The default is no.
STUN Test Enable	If the STUN Enable feature is enabled and a valid STUN server is available, the SPA9000
	can perform a NAT-type discovery operation when it powers on. It contacts the configured
	STUN server, and the result of the discovery is reported in a Warning header in all
	subsequent REGISTER requests. If the SPA9000 detects symmetric NAT or a symmetric
	firewall, NAT mapping is disabled.
	The default is no.
STUN Server	IP address or fully-qualified domain name of the STUN server to contact for NAT
	mapping discovery.

	Linksys SPA9000 Administrator Guide
Document Version 3.01		6-13