How to create master+forwarder dns server in linux

boby.kumar · 04-05-2014, 02:02 AM

Hi Team
I have created one new dns server in lab and its working properly.
Earlier we were using another dns server for lab pc's as 10.20.30.xx. which is outside the lab premises.
now issue with newly created as its not resolving query as previous. I am told by some to use forwarder option for this.
I want to use previous dns server as forwarding if newly can't resolved the queries
so i am looking to create master+forwarder dns server at new dns server so we could get easily replication.

can anyone clarify how to create forwarder option in named.conf at newly server?

TB0ne · 04-06-2014, 01:12 PM

Quote:

Originally Posted by boby.kumar

Hi Team
I have created one new dns server in lab and its working properly. Earlier we were using another dns server for lab pc's as 10.20.30.xx. which is outside the lab premises. now issue with newly created as its not resolving query as previous. I am told by some to use forwarder option for this. I want to use previous dns server as forwarding if newly can't resolved the queries so i am looking to create master+forwarder dns server at new dns server so we could get easily replication.

can anyone clarify how to create forwarder option in named.conf at newly server?

I'm sure one of the over TEN MILLION HITS on Google for "how to set up named forwarding in Linux" can probably tell you:
http://www.linuxhomenetworking.com/w..._in_named.conf
http://www.tldp.org/HOWTO/DNS-HOWTO-10.html

boby.kumar · 04-08-2014, 12:16 AM

Hi TBOne

Its not working me following your link.

TB0ne · 04-08-2014, 11:08 AM

Quote:

Originally Posted by boby.kumar

Hi TBOne
Its not working me following your link.

A few things:

You don't bother telling us what version/distro of Linux you're using
You don't bother telling us what you mean by "not working", such as giving us ANY error messages, etc.
You don't say WHICH of the TWO links I sent you that you tried, or what the results were
You don't acknowledge that there were over TEN MILLION other hits that you COULD have looked up/tried, since you didn't provide any of the other details mentioned.

Ask a clear question and provide details, or look things up on your own.

boby.kumar · 04-14-2014, 04:25 AM

Its not forwarding queries to forwarder dns server.

** server can't find XXX.com: SERVFAIL
Red Hat Enterprise Linux Server release 6.2 (Santiago) with
bind-utils-9.7.3-8.P3.el6.i686
rpcbind-0.2.0-8.el6.i686
bind-9.7.3-8.P3.el6.i686
samba-winbind-3.5.10-114.el6.i686
bind-chroot-9.7.3-8.P3.el6.i686
bind-dyndb-ldap-0.2.0-7.el6.i686
bind-libs-9.7.3-8.P3.el6.i686
samba-winbind-clients-3.5.10-114.el6.i686

There is no error in /var/log/messages for this. also tried with wireshark but nothing captured.

Can have now comment on this?

TB0ne · 04-14-2014, 10:34 AM

Quote:

Originally Posted by boby.kumar

Its not forwarding queries to forwarder dns server.

** server can't find XXX.com: SERVFAIL
Red Hat Enterprise Linux Server release 6.2 (Santiago) with
bind-utils-9.7.3-8.P3.el6.i686
rpcbind-0.2.0-8.el6.i686
bind-9.7.3-8.P3.el6.i686
samba-winbind-3.5.10-114.el6.i686
bind-chroot-9.7.3-8.P3.el6.i686
bind-dyndb-ldap-0.2.0-7.el6.i686
bind-libs-9.7.3-8.P3.el6.i686
samba-winbind-clients-3.5.10-114.el6.i686

There is no error in /var/log/messages for this. also tried with wireshark but nothing captured.
Can have now comment on this?

You were given things to check/try before, but you *STILL* don't say what you did to generate that message. One of the two links I looked up for you previously has troubleshooting tips...did you try them? Did you check your firewall/iptables rules? Did you check your configuration, since if you don't have it set correctly, forwarding won't work??

Red Hat's knowledegbase has LOTS of information on how to set up forwarding with bind
https://access.redhat.com/site/docum...e/s1-BIND.html

...along with troubleshooting tips, which you can STILL find with a brief search:
http://www.linuxhomenetworking.com/w..._in_named.conf

Again, unless you post ERRORS or give us any details, THERE IS NOTHING WE CAN TELL YOU. It's failing for SOME reason, but you don't share your configuration, and say you're not getting any errors at all. Since that's the case, what do you think anyone can tell you?? Since you're using Red Hat Enterprise, you should contact Red Hat support...you are PAYING FOR RHEL, RIGHT????