Hostname Naming Compliance

Eric C. Davis eric at
Mon Feb 23 18:54:46 UTC 2009

I know the option to use this compliance checker is present, but I'm 
curious to know if there are plans to make it mandatory to comply.  We 
aren't using this feature now, but I would like to.  My problem is 
politicking my way around the issue of breaking something that works.  
If Bind were to say they were going to start forcing compliance with 
this naming standard, then I simply have to say it's a standard that is 
being enforced.  Shouldn't enforcement be applied across the board 
anyway instead of at the operator's discretion?

Chris Buxton wrote:
> On Feb 23, 2009, at 10:19 AM, Eric C. Davis wrote:
>> Are there plans for Bind to enforce hostname compliance according to 
>> RFC's or is this going to be left up to each DNS operator?
> It's present in BIND 9.3 and later. All characters except a-z, A-Z, 
> 0-9, and "-" itself are forbidden to appear in the labels of any 
> domain name that is to be treated as a hostname. That is, any name 
> that has an A or AAAA record, or that appears in the RData of an NS, 
> MX, or SRV record (if I'm not mistaken).
> This can be disabled with:
> options {
>     check-names master warn; # or fail
> };
> or:
> zone "" {
>     check-names warn; # or fail
> };
> Chris Buxton
> Professional Services
> Men & Mice
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