[9fans] ndb suffix-specific dns changes

[9fans] ndb suffix-specific dns changes

[Russ Cox]

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Hi all,

Sometimes private networks want you to use a specific DNS server for a
specific domain suffix but still use your regular DNS server for all other
names. I've added support for this to my plan9 tree, and David du Colombier
has applied it to 9legacy. It might be worth adding to 9front as well.

The change is in
https://github.com/rsc/plan9/commit/e8c148ff092a5780d04aa2fd4a07a5732207b698
.

A corresponding update to dnsdebug is in
https://github.com/rsc/plan9/commit/1d0642ae493bf5ce798a6aa64a745bc6316baa11
(David, you don't have that one yet, I just wrote it).

As the man page update explains, the change is pretty minimal. Instead of
writing

    dns=1.2.3.4

you write

    dns=1.2.3.4 suffix=my.net

to say that 1.2.3.4 should be used for names ending in my.net and only
those.

Best,
Russ

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[9fans] Re: ndb suffix-specific dns changes

[David du Colombier]

> A corresponding update to dnsdebug is in
> https://github.com/rsc/plan9/commit/1d0642ae493bf5ce798a6aa64a745bc6316baa11
> (David, you don't have that one yet, I just wrote it).

Thanks. I've just added your ndb/dnsdebug change to 9legacy.

-- 
David du Colombier

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Re: [9fans] ndb suffix-specific dns changes

[Steffen Nurpmeso]

Russ Cox wrote in
 <CADSkJJV92O12s37h0QVbtVTx593k+H9tnF4wxjvzy08yqnWL4w@mail.gmail.com>:
 |Sometimes private networks want you to use a specific DNS server for a
 |specific domain suffix but still use your regular DNS server for all other
 |names. I've added support for this to my plan9 tree, and David du Colombier
 |has applied it to 9legacy. It might be worth adding to 9front as well.
 |
 |The change is in
 |https://github.com/rsc/plan9/commit/e8c148ff092a5780d04aa2fd4a07a5732207\
 |b698
 |.
 |
 |A corresponding update to dnsdebug is in
 |https://github.com/rsc/plan9/commit/1d0642ae493bf5ce798a6aa64a745bc6316b\
 |aa11
 |(David, you don't have that one yet, I just wrote it).
 |
 |As the man page update explains, the change is pretty minimal. Instead of
 |writing
 |
 |    dns=1.2.3.4
 |
 |you write
 |
 |    dns=1.2.3.4 suffix=my.net
 |
 |to say that 1.2.3.4 should be used for names ending in my.net and only
 |those.

(I thought you referred to RFC 9463 and RFC 9704.  Just in case it
is of interest...)

--steffen
|
|Der Kragenbaer,                The moon bear,
|der holt sich munter           he cheerfully and one by one
|einen nach dem anderen runter  wa.ks himself off
|(By Robert Gernhardt)

Re: [9fans] ndb suffix-specific dns changes

[cinap_lenrek]

i had the same problem with the "vpn internal"
zones of my employer, and found ndb/dns already
has a mechanism to define a delegated zone:

dom=my.net soa=delegated ns=ns.my.net

when ns.my.net doesnt resolve, you can serve
that domain yourself like:

dom=ns.my.net ip=1.2.3.4 soa= ns=ns.my.net

hope this is usefull.

--
cinap

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