> For the complete documentation index, see [llms.txt](https://prosbcdocs.telcobridges.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://prosbcdocs.telcobridges.com/tmedia-documentation/configuration/configure-a-sip-network-access-point-nap-with-a-local-fqdn.md).

# Configure a SIP Network Access Point (NAP) with a local FQDN

> **Applies to:** Tmedia 3.1, 3.2

It is required to enable a Local NAT Traversal in order to set a local FQDN in Via, Contact and Call-ID headers. This Local NAT Traversal needs being associate to the NAP which requires a public FQDN in place of an IP address in the specified headers.

To enable Local NAT Traversal:

1- Select **NATs** from the navigation panel.

![EnableLocalNatTraversal 0](https://docs.telcobridges.com/w/images/7/7e/EnableLocalNatTraversal_0.png)

2- Click **Create New NAT Traversal**

![EnableLocalNatTraversal 1](https://docs.telcobridges.com/w/images/d/d1/EnableLocalNatTraversal_1.png)

3- Enter a meaningful name.

* Choose 'Force public IP' Method.
* Provide local 'FQDN' in the 'Public IP address or FQDN' field.
* Click **Create**

![EnableLocalNatTraversalWithFqdn 2](https://docs.telcobridges.com/w/images/6/6e/EnableLocalNatTraversalWithFqdn_2.png)

Once the NAT configuration is completed, it must be associated with a NAP.

4- Select **NAPs** from the navigation panel

![EnableLocalNatTraversal 3](https://docs.telcobridges.com/w/images/3/33/EnableLocalNatTraversal_3.png)

5- Select a SIP NAP from the **Network Access Point** list

![EnableLocalNatTraversal 4](https://docs.telcobridges.com/w/images/3/38/EnableLocalNatTraversal_4.png)

6- In the **Network Address Translation** section:

* Choose 'Local Method' that contains the same name as the Local NAT configuration that you provided in step #2.
* Click **Save**

![EnableLocalNatTraversalWithFqdn 5](https://docs.telcobridges.com/w/images/2/29/EnableLocalNatTraversalWithFqdn_5.png)

### Related actions

[Toolpack:Associate Local NAT to NAP](https://github.com/telcobridges-main/tmedia-wiki/tree/main/tmedia/configuration/sip-configuration-for-local-symmetric-nat-traversal/README.md)


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