Hi
i had configured dns in ubuntu machine.But it dig sample.etl.com as well as ipaddress but dns does int resolving off .



Generated by NetworkManager
nameserver 202.71.xx.67
nameserver 202.71.xx.67
root@sample:~$ named-checkzone example.com /etc/bind/db.192
zone example.com/IN: NS 'sample.example.com' has no address records (A or AAAA)
zone example.com/IN: not loaded due to errors.
root@sample:~$ cat /etc/bind.192
cat: /etc/bind.192: No such file or directory
root@sample:~$ cat /etc/bind/db.192
;
; BIND reverse data file for local loopback interface
;
$TTL 604800
@ IN SOA sample.example.com. root.sample.example.com. (
1 ; Serial
604800 ; Refresh
86400 ; Retry
2419200 ; Expire
604800 ) ; Negative Cache TTL
;
@ IN NS sample.example.com.
5 IN PTR sample.example.com.
root@sample:~$ named-checkzone example.com /etc/bind/db.example.com
zone example.com/IN: loaded serial 2
OK
root@sample:~$ named-checkzone example.com /etc/bind/db.192
zone example.com/IN: NS 'sample.example.com' has no address records (A or AAAA)
zone example.com/IN: not loaded due to errors.
root@sample:~$ clear

root@sample:~$ cat /etc/bind/
cat: /etc/bind/: Is a directory
root@sample:~$ cd /etc/bind/
root@sample:/etc/bind$ ls
bind.keys db.192 db.root named.conf.options
db.0 db.empty named.conf named.conf.options.bak
db.127 db.example.com named.conf.default-zones rndc.key
db.255 db.local named.conf.local zones.rfc1918
root@sample:/etc/bind$ cat db.example.com
;
; BIND data file for local loopback interface
;
$TTL 604800
@ IN SOA sample.example.com. root.sample.example.com. (
2 ; Serial
604800 ; Refresh
86400 ; Retry
2419200 ; Expire
604800 ) ; Negative Cache TTL
;
@ IN NS sample.example.com.
@ IN A 127.0.0.1
@ IN AAAA ::1
sample IN A 192.168.1.5
root@sample:/etc/bind$ cat named.conf.local
//
// Do any local configuration here
//

// Consider adding the 1918 zones here, if they are not used in your
// organization
//include "/etc/bind/zones.rfc1918";


zone "example.com" {
type master;
file "/etc/bind/db.example.com";
};
zone "1.168.192.in-addr.arpa" {
type master;
notify no;
file "/etc/bind/db.192";
};
root@sample:/etc/bind$ cat db.192
;
; BIND reverse data file for local loopback interface
;
$TTL 604800
@ IN SOA sample.example.com. root.sample.example.com. (
1 ; Serial
604800 ; Refresh
86400 ; Retry
2419200 ; Expire
604800 ) ; Negative Cache TTL
;
@ IN NS sample.example.com.
235 IN PTR sample.example.com.
root@sample:/etc/bind$ named-checkzone example.com /etc/bind/db.example.com
zone example.com/IN: loaded serial 2
OK
root@sample:/etc/bind$ named-checkzone example.com /etc/bind/db.192
zone example.com/IN: NS 'sample.example.com' has Generated by NetworkManager
nameserver 202.71.xx.67
nameserver 202.71.xx.67
root@sample:~$ named-checkzone example.com /etc/bind/db.192
zone example.com/IN: NS 'sample.example.com' has no address records (A or AAAA)
zone example.com/IN: not loaded due to errors.
root@sample:~$ cat /etc/bind.192
cat: /etc/bind.192: No such file or directory
root@sample:~$ named-checkzone example.com /etc/bind/db.example.com
zone example.com/IN: loaded serial 2
OK
root@sample:~$ named-checkzone example.com /etc/bind/db.192
zone example.com/IN: NS 'sample.example.com' has no address records (A or AAAA)
zone example.com/IN: not loaded due to errors.
root@sample:~$ clear

root@sample:~$ cat /etc/bind/
cat: /etc/bind/: Is a directory
root@sample:~$ cd /etc/bind/
root@sample:/etc/bind$ ls
bind.keys db.192 db.root named.conf.options
db.0 db.empty named.conf named.conf.options.bak
db.127 db.example.com named.conf.default-zones rndc.key
db.255 db.local named.conf.local zones.rfc1918
root@sample:/etc/bind$ cat db.example.com
;
; BIND data file for local loopback interface
;
$TTL 604800
@ IN SOA sample.example.com. root.sample.example.com. (
2 ; Serial
604800 ; Refresh
86400 ; Retry
2419200 ; Expire
604800 ) ; Negative Cache TTL
;
@ IN NS sample.example.com.
@ IN A 127.0.0.1
@ IN AAAA ::1
sample IN A 192.168.1.5
root@sample:/etc/bind$ cat named.conf.local
//
// Do any local configuration here
//

// Consider adding the 1918 zones here, if they are not used in your
// organization
//include "/etc/bind/zones.rfc1918";


zone "example.com" {
type master;
file "/etc/bind/db.example.com";
};
zone "1.168.192.in-addr.arpa" {
type master;
notify no;
file "/etc/bind/db.192";
};
root@sample:/etc/bind$ cat db.192
;
; BIND reverse data file for local loopback interface
;
$TTL 604800
@ IN SOA sample.example.com. root.sample.example.com. (
1 ; Serial
604800 ; Refresh
86400 ; Retry
2419200 ; Expire
604800 ) ; Negative Cache TTL
;
@ IN NS sample.example.com.
235 IN PTR sample.example.com.
root@sample:/etc/bind$ named-checkzone example.com /etc/bind/db.example.com
zone example.com/IN: loaded serial 2
OK




ecare@ecare:~$ dig sample.example.com

; <<>> DiG 9.7.0-P1 <<>> sample.example.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 62202
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;sample.example.com. IN A

;; AUTHORITY SECTION:
etl.com. 9771 IN SOA ns.domainnetwork.se. hostmaster.melbourneitcbs.com. 2011092801 21600 3600 2419200 86400

;; Query time: 91 msec
;; SERVER: 202.71.xx.67#53(202.71.xx.67)
;; WHEN: Wed Feb 29 15:16:34 2012
;; MSG SIZE rcvd: 112

You got a response from 202.71.xx.67, not from your dns. You should add it 1st in /etc/resolv.conf if you want to use it as a resolver for your domain. Or else run
to get your answer.

If you want to do reverse lookups you need the -x option in dig:

Hi Bathory,

i could able to resolve the my domain im localhost ,when i nsllokup domain name its working and getting resolve it i could int resolve the ipaddress using nslookup .When i try to send mail through sendmail im getting out error due to dns issue ,



:~$ nslookup etl.com
Server: 202.71.xx.67
Address: 202.71.xx.67#53

Non-authoritative answer:
Name: example.com
Address: 203.27.227.85

:~$ nslookup 61.8.144.235
Server: 202.71.xx.67
Address: 202.71.xx.67#53

** server can't find 235.144.8.61.in-addr.arpa.: NXDOMAIN

ecare@ecare:~$


sample@sample:~$ dig sample.example.com @localhost

; <<>> DiG 9.7.0-P1 <<>> sample.example.com @localhost
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 29218
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;sample.example.com. IN A

;; Query time: 0 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Wed Feb 29 17:45:28 2012
;; MSG SIZE rcvd: 31

sample@sample:~$ dig 192.168.1.5 @localhost

; <<>> DiG 9.7.0-P1 <<>> 192.168.1.5 @localhost
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 34881
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;192.168.1.5. IN A

;; AUTHORITY SECTION:
. 10800 IN SOA a.root-servers.net. nstld.verisign-grs.com. 2012022900 1800 900 604800 86400

;; Query time: 2261 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Wed Feb 29 17:45:47 2012
;; MSG SIZE rcvd: 105



:~$ nslookup etl.com
Server: 202.71.xx.67
Address: 202.71.xx.67#53

Non-authoritative answer:
Name: example.com
Address: 203.27.227.85

:~$ nslookup 10.200.1.5
Server: 202.71.xx.67
Address: 202.71.xx.67#53

** server can't find 5.1.200.10.in-addr.arpa.: NXDOMAIN

ecare@ecare:~$

sample@sample:~$ echo mail | mail -h hello "saravana@sampletechlabs.com"
mail: invalid option -- h
Try `mail --help' or `mail --usage' for more information.
sample@sample:~$ echo mail | mail -s hello "saravana@sampletechlabs.com"
sample@sample:~$ nslookup sample.example.com
Server: 202.71.xx.67
Address: 202.71.xx.67#53

** server can't find sample.example.com: NXDOMAIN

sample@sample:~$ cat /etc/resolv.conf
# Generated by NetworkManager
nameserver 202.71.xx.67
nameserver 202.71.xx.67
sample@sample:~$

This is irrelevant to dns in a first place. You get a "User unknown" from the remote smtp


Is you domain etl.com? If it is then why you're trying to resolve 61.8.144.235? Are you authoritative for 61.8.144.235 (i.e. the 144.8.61.in-addr.arpa zone)?

Add as the 1st entry in /etc/resolv.conf your nameserver, or configure NetworkManager to do so

You get a SERVFAIL even from your own nameserver


Again. If you want to do reverse lookups you need the -x switch in dig, like this:

Dunno why you tried to resolve 10.200.1.5, but you cannot use public nameservers (like 202.71.xx.67) to resolve private IPs


So what is the result? BTW there is no such domain.