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Figure 2: SIP Signaling Penetration - TCP/TLS Port
Step 2: Once the internal port information has been confirmed, users can then map them to the
corresponding external ports on the router.
Example: If the internal UDP port is 5060, users would map port 5060 to whatever is designated as the
external UDP port for SIP traffic on the router. Please contact your enterprise’s IT administrator for this
information.
Note:
1. For security purposes, it is not recommended to use an external port number that is the same as
the internal port number.
2. If the router supports SIP ALG, it will need to be disabled.
Step 3: Configure NAT settings as shown in the figure below:
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