Canon EOS-1D X Mark III Advanced User's Manual page 710

Use TCP/IPv6
• Select [Enable] or [Disable] for IPv6.
Manual setting
• To set the IP address manually, select [Enable]. [DNS server] is set to [Manual
setting], and you can configure [DNS address], [Manual address], [Prefix length],
and [Gateway].
DNS server
• To set the DNS server IP address manually, select [Manual setting].
• Select [Disable] if you will not use a DNS server.
• If the setting is currently [Auto assign], setting [Manual setting] to [Enable]
changes it to [Manual setting].
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