Cisco Linksys SPA9000 - Manual (Page 161)

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Linksys SPA9000 Administrator Guide
Document Version 3.01
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.