Cisco WRP400-G1 Administration Guide - Page 73
Send Resp To Src, Substitute VIA Addr - nat disable
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Advanced Voice Fields SIP page A 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. Insert VIA rport The default is no. Inserts the 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. Send Resp To Src Port The default is no. Sends responses to the request source port instead of the VIA sent-by port. Select yes or no from the drop-down menu. STUN Enable The default is no. Enables the use of STUN to discover NAT mapping. Select yes or no from the drop-down menu. STUN Test Enable The default is no. If the STUN Enable feature is enabled and a valid STUN server is available, the WRP400 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 WRP400 detects symmetric NAT or a symmetric firewall, NAT mapping is disabled. STUN Server The default is no. IP address or fully-qualified domain name of the STUN server to contact for NAT mapping discovery. Cisco Small Business WRP400 Administration Guide 71