Basic Connectivity Testing and Service Verification ...

Testing TCP port 53 connectivity can be done using /ad /s ip_addr instead. Where ip_addr is the IP address of a DNS server that is authoritative for the _msdcs zone in the root of the Active Directory domain. For example: dnslint /d microsoft.com /v /test_tcp /c. The /c (connectivity test) switch requests that DNSLint tests well known e-mail ... ................
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