Is bind 9.2.1 allowed "_" in dns name?

Julie Xu j.xu at
Thu Oct 24 05:22:47 UTC 2002

Thanks Cricket, Thanks Centurion, David, Gregory, Jim, Joseph.

I have interoperated your mails as the underscore will not cause problem
to named server.  That is enough for me to go step further for
implementing bind with DDNS + mysql.

I tried to find the documentation of DDNS, but, I have not found
anything. Could you please give me a tip - where is the document which
can help me to configure DDNS. 

Any comments will be appreciated

Thanks in advance 

Julie Xu

Data Communication Team
Information Technology Directorate
University of Western Sydney
Locked Bag 1797
Penrith South DC  NSW  1797 

> -----Original Message-----
> From: bind-users-bounce at [mailto:bind-users-bounce at] On
> Behalf Of Cricket Liu
> Sent: Wednesday, October 23, 2002 12:15 AM
> To: bind-users at
> Subject: Re: Is bind 9.2.1 allowed "_" in dns name?
> Julie Xu wrote:
> > Any one help me?
> >
> > I test it and it seems ok, but, I still want to know that does any
> > problem occur if a SND name includes "_" or other strange
> >
> > We want start to think about DDNS, and as I understand the bind8
> > problem with the sign "_".
> It doesn't have problems with underscores, per se; it doesn't allow
> hostnames with underscores in them, by default, to protect resolvers
> that might interpret the underscores specially.
> > Can I get some advice about the problem when you first time use
> BIND 9 doesn't do name checking, so you can use underscores in
> domain names.
> cricket
> Men & Mice
> DNS Software, Training and Consulting
> The DNS and BIND Cookbook, available now!

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