Configure Nat Mapping With Stun - Cisco WRP500 Administration Manual

Configure NAT Mapping
R E V I E W D R A F T # 1 — C I S C O C O N F I D E N T I A L
In the NAT Support Parameters section, enter the following settings:
Step 3
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Under the Voice menu, click Line 1 or Line 2 to choose the line interface that you want to modify.
Step 4
In the NAT Settings section, enter the following settings:
Step 5
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Click Save Settings.
Step 6
Note

Configure NAT Mapping with STUN

This option is considered a practice of last resort and should be used only if the other methods are
unavailable. This option can be used if the following requirements are met:
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Use NAT mapping only if the ITSP network does not provide a Session Border Controller functionality.
Note
Cisco WRP500 Administration Guide
2-2
Handle VIA received, Insert VIA received, Substitute VIA Addr: Choose yes.
Handle VIA rport, Insert VIA rport, Send Resp To Src Port: Choose yes.
EXT IP: Enter the public IP address that was assigned by your ISP.
IMAGE WILL BE SUPPLIED (SCREENSHOT) - replaces 194555
NAT Mapping Enable: Choose yes.
NAT Keep Alive Enable: Choose yes.
IMAGE WILL BE SUPPLIED (SCREENSHOT) - replaces 194556
You also need to configure the firewall settings on your router to allow SIP traffic. See
and SIP," on page 5.
You have a dynamically assigned external (public) IP address from your ISP.
You must have a computer running STUN server software.
The edge device uses an asymmetric NAT mechanism. If the WRP500 is the edge device, this
requirement is not met. For more information, see
or Asymmetric NAT," on page
If the WRP500 is connected to an Ethernet switch, the switch must be configured to enable Spanning
Tree Protocol and Port Fast on the port to which the WRP500 is connected.
Chapter 2
Voice tab > SIP: NAT Support Parameters
Voice tab > Line N > NAT Settings
"Determine Whether the Router Uses Symmetric
4.
Configure Your System for ITSP Interoperability
"Firewalls