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Doing a reverse DNS lookup by typing out the IP address in reverse, plus adding .in-addr.arpa to the end is tedious, but fortunately dig has the -x option which makes that process much simpler as one can just feed it a normal IP address.
19 lines
421 B
Markdown
19 lines
421 B
Markdown
# dig
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> DNS Lookup utility.
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- Lookup the IP(s) associated with a hostname (A records):
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`dig +short {{hostname.com}}`
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- Lookup the mail server associated with a given domain name (MX record):
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`dig +short {{hostname.com}} MX`
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- Specify an alternate DNS server to query (8.8.8.8 is google's public DNS):
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`dig @8.8.8.8 {{hostname.com}}`
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- Perform a reverse DNS lookup on an IP address (PTR record):
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`dig -x 8.8.8.8`
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