How to configure CNAME for Domain

vijay1585 · 08-26-2010, 04:58 AM

Hi All

This is my example domain name

loc1.test.com --> 10.8.5.5
loc2.test.com --> 10.8.5.6
con1.test.com --> 10.8.5.7

mail.test.com --> con1.test.com

mk.test.com --> loc1.test.com,loc2.test.com

per1.test.com --> mk.test.com
per2.test.com --> mk.test.com
per3.test.com --> mk.test.com
per4.test.com --> mk.test.com

We have configured DNS Zone like this

$TTL 604800
test.com. IN SOA ns1.loc1.test.com. admid.test.com (
24082003 ; Serial
604800 ; Refresh
86400 ; Retry
2419200 ; Expire
604800 ) ; Negative Cache TTL

@ IN NS ns1.loc1.test.com
@ IN NS ns1.loc2.test.com
ns1.loc1.test.com IN A 10.8.5.5
ns1.loc2.test.com IN A 10.8.5.6
test.com. IN A 10.8.5.5
localhost IN A 127.0.0.1
loc1 IN A 10.8.5.5
loc2 IN A 10.8.5.6
con1 IN A 10.8.5.7
mail IN CNAME con1
mk IN CNAME loc1

How to configure CNAME for

mk.test.com --> loc2.test.com

and

per1.test.com --> mk.test.com
per2.test.com --> mk.test.com
per3.test.com --> mk.test.com
per4.test.com --> mk.test.com

Could any one help me in configuring CNAME for mk.test.com,per1.test.com,per2.test.com,per3.test.com and per4.test.com

bathory · 08-26-2010, 05:43 AM

The same way as you have already done with the 2 CNAMEs

Code:

mk CNAME loc2
per1 CNAME mk
per2 CNAME mk
per3 CNAME mk
per4 CNAME mk

BTW It's good practice not to use a CNAME for a mail server (that is for the MX record of a zone). In your case you can use an A record pointing to the same IP as con1:

Code:

mail  A 10.8.5.7

vijay1585 · 08-26-2010, 06:59 AM

Hi Bathory,

Thanks for your reply

ok. we will not use cnme for MX record.
We have tried like this for CNAME

Quote:

mk IN CNAME loc1
mk CNAME loc2

We got error like this
named[20450]: dns_master_load: /etc/bind/test.com.zone:27: mk.test.com: multiple RRs of singleton type

bathory · 08-26-2010, 12:01 PM

You cannot have multiple CNAMEs for the same host

vijay1585 · 08-27-2010, 12:38 AM

Ok, Thanks for your guide.