Question

DNS redirection with bind

Asked by: acerola

How do I configure my DNS server (bind) to redirect all requests to *.thisdomain.com to *.otherdomain.com.

otherdomain.com is not on my server.

I want to do something like this:


$TTL    3600
@                       IN SOA          ns1.mydnsserver.com. root.mydnsserver.com. (
                                        1   ; serial
                                        3600  ; refresh
                                        600    ; retry
                                        86400   ; expire
                                        3600 )    ; min ttl
;
                        NS              ns1.mydnsserver.com.
                        NS              ns2.mydnsserver.com.
                        MX              10 mail
                        A               otherdomain.com.
;
localhost               A               127.0.0.1
www                     A               www.otherdomain.com.
ftp                     A               ftp.otherdomain.com.
*                       A               *.otherdomain.com.

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Asked On
2003-08-04 at 07:56:08ID20698967
Tags

bind

,

redirect

Topic

Linux Networking

Participating Experts
3
Points
50
Comments
6

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Answers

 

by: ahoffmannPosted on 2003-08-04 at 09:25:03ID: 9072071

forwarding is setup in named.conf, not the zone files.
Also: you should not use different domains in the same zone file, like your
  www                     A               www.otherdomain.com.
this definition will also not work propper

 

by: jleviePosted on 2003-08-04 at 12:02:52ID: 9073255

There are two things that you can do. One is to create CNAME records for each node in thisdomain.com pointing to the equivalent-host.otherdomain.com. The other is to go to the central registry and change the nameserver IP's for thisdomain.com to point to the DNS servers for otherdomain.com

 

by: acerolaPosted on 2003-08-04 at 17:52:10ID: 9075462

thanks, but i am a real dummy regarding bind.
could you give me an example of a named.conf entry?
also, i tried cname and it didn't work.

 

by: jleviePosted on 2003-08-04 at 19:18:23ID: 9075828

An example of using CNAME records would be:

           NS              ns1.mydnsserver.com.
           NS              ns2.mydnsserver.com.
           MX  10        mail.otherdomain.com.

www    IN CNAME   www.otherdomain.com.
ftp       IN CNAME   ftp.otherdomain.com.
xx       IN CNAME   yy.otherdomain.com.
...

You can't, as far as I know, use anything in named.conf to change the resolution of names in a zone. That can only be done with CNAME records, or by changing what DNS server is authoritative for the domain.

 

by: sinexecPosted on 2003-08-04 at 20:34:52ID: 9076112

Hello jlevie,
In fact, as of BIND 9.0 a new RR (Resource Record) type (DNAME) has been introduced.
DNAME records do just what acerola needs. For example

###
$TTL 5M
$ORIGIN mydomain.com

test    DNAME    otherdomain.com.
###

In this case, for something like  wwww.test.mydomain.com a CNAME to wwww.otherdomain.com would be synthesized and returned as an answer to a query. After that, the name would yield the ip-address of wwww.otherdomain.com.

 

by: acerolaPosted on 2004-03-31 at 19:05:02ID: 10729276

Closing question.
Thanks all.

20120131-EE-VQP-002

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