Home / server / Questions / 234241
Accepted
xenoterracide
Asked: 2011-02-11 22:21:36 +0800 CST

Is @ valid in any part of the zone file?

  • 772

e.g. can I do

subdomain IN CNAME @

in a zone file? or is it only valid in the beginning of a record? e.g

@ IN TXT "v=spf1 a mx -all"
domain-name-system bind

2 Answers

  1. Best Answer

    @ is legal both as an "owner name" (i.e. the name of a zone file entry) and as "rdata" (i.e. the contents of a DNS entry), but only as a standalone token.

    What you cannot do is <label>.@ - there's no need because <label> on its own with no trailing dot will implicitly append the current value of @ (aka $ORIGIN).

    • 3

  2. Have a look at this page. They did not say explicitly whether it is allowed or not to have @ at the end in your DNS record. You can try it yourself and see if it works!

    EDIT:

    It seems legal to have at the end. I found an example on Wikipedia.

    • 1