Troubleshooting
Cisco Small Business ATA Administration Guide 227
C
4. Add a STUN server to allow traversal of UDP packets through the NAT device.
On the SIP tab of the administration web server, set to yes, and
enter the IP address of the STUN server in .
STUN (Simple Traversal of UDP through NATs) is a protocol defined by RFC
3489, that allows a client behind a NAT device to find out its public address, the
type of NAT it is behind, and the port associated on the Internet connection
with a particular local port. This information is used to set up UDP
communication between two hosts that are both behind NAT routers. Open
source STUN software can be obtained at the following website:
http://www.voip-info.org/wiki-Open+Source+VOIP+Software
NOTE STUN does not work with a symmetric NAT router. Enable debug through
syslog (see FAQ#10), and set to yes. The messages
indicate whether you have symmetric NAT or not.
To Next Page
Loading...
Need help?
General
