Servers supporting DNS-over-TLS
The following servers are configured to support TLS on port 1021 and STARTTLS on port 53 for testing purposes.
Open resolver hosted by NLNetLabs:
- NLNetLabs is kindly hosting an open resolver (running Unbound):
- IP address: 184.108.40.206 and 2a04:b900:0:100::38
- The server key file can be obtained by contacting firstname.lastname@example.org
Authoritative getdnsapi.net servers
- The authoritative servers for getdnsapi.net are running a patched version of NSD:
- IP address: 220.127.116.11 and 2a04:b900:0:100::37
Authoritative test server hosted by Verisign Labs:
- Verisign Labs are kindly hosting a test zone on a server (running a patched version of NSD):
How to Decode TLS packets in Wireshark
If you want to decode the DNS packets in Wireshark (use 1.12.1 or later) to get support TLSv1.2
Obtain the server key file
Configure the key in wireshark in Edit->Preferences
- open the protocol list in the right hand menu and select SSL from the list
- Click on the RSA keys list 'Edit' box and then click on 'New' in the dialog that appears
- Enter remote servers IP address e.g.18.104.22.168 and the port for TLS (1021), and 'http' or 'spdy' for the protocal (DNS is not yet available here).
- Use the Key File selector to choose the key file you downloaded
- Save this by hitting OK, OK and Apply.
- Back in the main window use the Analyze->Decode as... option to choose to decode as SSL
- Click on one of the packets labelled 'Application data' and you should see an additional tab appear in the Packet bytes view window of wireshark labelled "Decrypted SSL data".