Unable to run DNS resolver in kernel 2.6.25.7/busybox 19.1.

kumar_bst · 02-27-2009, 02:00 AM

Hi,

I am using linux kernel 2.6.25.7 and busybox 1.9.1 in a embedded system. The problem is, I cant use DNS in my system.
I have seen that, dnsd is present in the system, but cant use nslookup to resolve www.yahoo.com.
It is thowing the error message, nslookup: can't resolve 'www.yahoo.com'
Please help me to configure dns resolver in my system.

Thanks and regards,

Amit

shakezilla · 02-27-2009, 02:53 AM

If all you need is the IP, check to see if you can do 'dig' or 'host'. This is what I get from those commands:

Code:

[justin : ~] dig yahoo.com

; <<>> DiG 9.5.0-P2 <<>> yahoo.com
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 63906
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;yahoo.com.                     IN      A

;; ANSWER SECTION:
yahoo.com.              80      IN      A       206.190.60.37

;; Query time: 177 msec
;; SERVER: 192.168.2.1#53(192.168.2.1)
;; WHEN: Fri Feb 27 02:50:03 2009
;; MSG SIZE  rcvd: 43

[justin : ~] host yahoo.com
yahoo.com has address 206.190.60.37
yahoo.com has address 206.190.60.37
yahoo.com has address 206.190.60.37

kumar_bst · 03-02-2009, 06:15 PM

Thanks for your reply, but in my system dig and host are not available. I am developing a small embedded system.
Here is the error message i am getting,

# nslookup www.yahoo.com
Server: 219.250.36.130
Address 1: 219.250.36.130

nslookup: can't resolve 'www.yahoo.com'

The same dns server is working fine for my Linux PC but not giving result for my embedded system.

Is there any problem with glibc?

shakezilla · 03-04-2009, 03:33 PM

It looks like nslookup is running fine, so I would guess that it's a network problem.

However, I'm never set up a dns server, so I don't really know what to tell you.

Maybe someone else can help.

kumar_bst · 03-08-2009, 07:57 AM

Hi,

Thanks for your help.

I found the solution, few libraries were missing in my system, libresolve.so and libdns.so.

Regards,

Amit