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CmdID / Commands / nslookup set

nslookup set port

Changes the default TCP/UDP Domain Name System (DNS) name server port to the specified value. Windows commands reference

On Windows

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Windows

from the Windows commands reference, CC BY 4.0
set port=<port>
<port>Specifies the new value for the default TCP/UDP DNS name server port. The default port is 53.
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