And if you have IPv6 enabled without the Ipv6 DNS you can run dcdiag /test:dns you will receive errors stating that DNS servers could not be contacted. Trust me I fix this issue on a regular here on EE. If there is not ::1 there is no loopback on to a DNS server for IPv6 which will again cause errors.

May 27, 2020 Ping test shown as IPv6 in local server itself - DNS Oct 25, 2019 SMTP Email Test Tool (IPv4 & IPv6) - Network, DNS, IP SMTP Email Test Tool The SMTP Email Test Tool allows you to Test the Mail Server, MX Server Settings and SSL/TLS Connection Encryption for an Email Address or Domain. Select if you want to test IPv4 or IPv6 connectivity to the Mail Server. mitm6 – compromising IPv4 networks via IPv6 – Fox-IT

Whenever your computer needs to contact a server on the Internet, such as when you enter a URL into your browser, your computer contacts a DNS server and requests the IP address. Most Internet service providers assign their customers a DNS server which they control and use for logging and recording your Internet activities.

Jan 11, 2018 dns-server in ipv6 dhcp pool - Cisco Community As currently, you are using the dual-stack network (IPv4 and IPv6) in your lab and didn't assign the IPv6 address to the DNS server so it is ok, you will use only IPv4 DNS server. But as you mentioned that you want to migrate or use IPv6 network only then we recommend you first migrate your important servers and services in the IPv6 address as Best free and public DNS servers in 2020 | TechRadar

Jul 26, 2019

To validate the configuration changes, rerun the Dcdiag /test:DNS /v command with the /e: or /s: switch, as appropriate. If you do not have IP version 6 (IPv6) enabled on the domain controller, you should expect the host (AAAA) validation portion of the test to fail, but if you are not using IPv6 on your network, these records are not necessary. May 27, 2020 · Step 4: Select Internet Protocol Version 6 (TCP/IPv6) on the list and click the Properties button. Step 5: In the pop-up window, change the current DNS setting to Use the following DNS server Forces Ping to use an IPv6 address when the DNS name query for a host name returns both IPv4 and IPv6 addresses. Note down The Ping -f, -v TOS, -r count, -s count, -j host-list, and -k host-list command line options are not supported for IPv6. Checks that the mail servers found in the previous test are accepting SMTP connections on their IPv6 address. This test waits for the remote server to display an SMTP banner. Some mail servers use a delay before displaying such a banner which can slow this test down, or in some cases cause it to time out.