> For the complete documentation index, see [llms.txt](https://tmediadocs.telcobridges.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://tmediadocs.telcobridges.com/configuration/web-portal-3-3/protocol-stack/sip/dns-configuration.md).

# DNS Configuration

> **Applies to:** SBC 3.1, 3.3

**To enable DNS:**

1. Select **DNS** from the navigation menu.

![ConfigureDNS 1](https://docs.telcobridges.com/w/images/7/7b/ConfigureDNS_1.png)

2. Click **Create New DNS Group**

![ConfigureDNS 2](https://docs.telcobridges.com/w/images/b/b1/ConfigureDNS_2.png)

3. Enter a name for the DNS Group

![ConfigureDNS 3](https://docs.telcobridges.com/w/images/1/14/ConfigureDNS_3.png)

* **Enabled:** Enables DNS name resolution support for this group.
* **Use Cache:** Use DNS name caching for improved performance.
* **Cache Expire Time:** DNS name cache expiration time.
* **Query Timer:** DNS query timeout.
* **Query Retry Count:** DNS query maximum retries before giving up.

4. Click to **Create** button

![ConfigureDNS 4](https://docs.telcobridges.com/w/images/3/30/ConfigureDNS_4.png)

5. In the new window click to \*\*Create New DNS Server \*\*

![ConfigureDNS 5](https://docs.telcobridges.com/w/images/7/7c/ConfigureDNS_5.png)

6. Enter a name for the new DNS server

![ConfigureDNS 6](https://docs.telcobridges.com/w/images/b/b5/ConfigureDNS_6.png)

7. Enter the DNS Server IP address and Select the local IP interface used to send DNS queries.

![ConfigureDNS 7](https://docs.telcobridges.com/w/images/1/1b/ConfigureDNS_7.png)

8. DNS server Port, Protocol and local POrt can be configured under **Advanced Parameters**

![ConfigureDNS 8](https://docs.telcobridges.com/w/images/e/eb/ConfigureDNS_8.png)

9. Click to **Create** button

![ConfigureDNS 9](https://docs.telcobridges.com/w/images/f/ff/ConfigureDNS_9.png)

10. Select which interfaces can get FQDN resolved. Only incoming messages coming from those IPs can get FQDN resolved.

![ConfigureDNS 10](https://docs.telcobridges.com/w/images/5/5f/ConfigureDNS_10.png)

You can create local DNS entries from the same menu.

1. Click to **Local Entries** and **Create New DNS local Entry**

![ConfigureDNS 11](https://docs.telcobridges.com/w/images/4/4e/ConfigureDNS_11.png)

2. Enter a name for Local DNS and FQDN

![ConfigureDNS 12](https://docs.telcobridges.com/w/images/a/a8/ConfigureDNS_12.png)

3. Click to **Create** button

![ConfigureDNS 13](https://docs.telcobridges.com/w/images/b/bb/ConfigureDNS_13.png)

4. Click to \*\* Create New DNS local entry record\*\*

![ConfigureDNS 14](https://docs.telcobridges.com/w/images/d/de/ConfigureDNS_14.png)

5 . Enter a name for Local DNS entry

![ConfigureDNS 15](https://docs.telcobridges.com/w/images/9/9c/ConfigureDNS_15.png)

* **IP Address:** Address to be resolved.
* **Port:** Port to resolved by SRV request
* **Service:** Service for this entry. \_sip.\_udp, \_sip.\_tcp etc..

6. Click to **Create** button

![ConfigureDNS 16](https://docs.telcobridges.com/w/images/b/b2/ConfigureDNS_16.png)


---

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