Cisco WRP400-G1 Administration Guide - Page 28

Firewalls and SIP, Voice, Line 1, Save Settings

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Configuring Your System for ITSP Interoperability Firewalls and SIP c. From the Debug level drop-down list, choose 3. 2 STEP 4 To collect information about the type of NAT your router is using, complete the following tasks: a. Under the Voice menu, click SIP. b. Scroll down to the NAT Support Parameters section. c. From the STUN Test Enable field, choose yes. STEP 5 To enable SIP signalling, complete the following task: a. Under the Voice menu, click Line 1 or Line 2 to choose the line interface that you want to modify. b. In the SIP Settings section, choose full from the SIP Debug Option field. STEP 6 Click Save Settings. STEP 7 View the syslog messages to determine whether your network uses symmetric NAT. Look for a warning header in the REGISTER messages, such as Warning: 399 spa "Full Cone NAT Detected." Firewalls and SIP To enable SIP requests and responses to be exchanged with the SIP proxy at the ITSP, you must ensure that your firewall allows both SIP and RTP unimpeded access to the Internet. • Make sure that the following ports are not blocked: • SIP ports-UDP port 5060 through 5063, which are used for the ITSP line interfaces Cisco Small Business WRP400 Administration Guide 26

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Configuring Your System for ITSP Interoperability
Firewalls and SIP
Cisco Small Business WRP400 Administration Guide
26
2
c.
From the
Debug level
drop-down list, choose
3
.
STEP 4
To collect information about the type of NAT your router is using, complete the
following tasks:
a.
Under the
Voice
menu, click
SIP
.
b.
Scroll down to the
NAT Support Parameters
section.
c.
From the
STUN Test Enable
field, choose
yes
.
STEP 5
To enable SIP signalling, complete the following task:
a.
Under the
Voice
menu, click
Line 1
or
Line 2
to choose the line interface that
you want to modify.
b.
In the
SIP Settings
section, choose
full
from the
SIP Debug Option
field.
STEP 6
Click
Save Settings
.
STEP 7
View the syslog messages to determine whether your network uses symmetric
NAT. Look for a warning header in the REGISTER messages, such as Warning: 399
spa "Full Cone NAT Detected.”
Firewalls and SIP
To enable SIP requests and responses to be exchanged with the SIP proxy at the
ITSP, you must ensure that your firewall allows both SIP and RTP unimpeded
access to the Internet.
•
Make sure that the following ports are not blocked:
•
SIP ports—UDP port 5060 through 5063, which are used for the ITSP line
interfaces