how to make Slackware 10 realised DNS setting changed?

carboncopy · 11-27-2004, 02:37 AM

Hi!

I would like to know how to make the system realised that I have changed the /etc/resolv.conf without rebooting?

If possible, I do not want to bring down ./rc.inet1 (bring down network interfaces).

Thanks

Cedrik · 11-27-2004, 04:36 AM

Logically the system should take in account the changes in /etc/resolv.conf as soon as you save
the file. You probably did a wrong syntax.

carboncopy · 11-27-2004, 07:47 AM

Quote:

Originally posted by Cedrik
Logically the system should take in account the changes in /etc/resolv.conf as soon as you save
the file. You probably did a wrong syntax.

I don't think I did a wrong syntax.

1. dig <webaddress> works
2. the syntax is just nameserver <ip>
search <domain name>

However, ping or any other prog can't resolve the address. Just dig can.

carboncopy · 11-27-2004, 07:49 AM

Cedrik, you are right, (not about wrong syntax). I just tried out another DNS server and it works straight away. There was some changes with the network which blocks the DNS server which I was using. The funny thing is, dig works but not other programs. Thanks.

What port does dig uses and what is the normal port for resolving address?

Cedrik · 11-27-2004, 08:30 AM

It should be UDP 53, when you said "dig works but not others", are you sure that it answers
correctly ? (status: NOERROR and right adresses at ANSWER section)

carboncopy · 11-27-2004, 08:56 AM

absolutely positive that the answer was correct.

So is there something which dig is doing and not other progs (including ping).

Cedrik · 11-27-2004, 09:13 AM

What does it say with for example :

dig @yournameserver google.com

carboncopy · 11-27-2004, 09:38 AM

If I use 161.142.2.17 in /etc/resolv.conf, I can't resolve address using other apps. But if I use dig: I get the following.

Code:

root@fire:/# dig @161.142.2.17 google.com

; <<>> DiG 9.2.3 <<>> @161.142.2.17 google.com
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 50482
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 4, ADDITIONAL: 4

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

;; AUTHORITY SECTION:
google.com.             87810   IN      NS      ns1.google.com.
google.com.             87810   IN      NS      ns2.google.com.
google.com.             87810   IN      NS      ns3.google.com.
google.com.             87810   IN      NS      ns4.google.com.

;; ADDITIONAL SECTION:
ns1.google.com.         260619  IN      A       216.239.32.10
ns2.google.com.         260619  IN      A       216.239.34.10
ns3.google.com.         180321  IN      A       216.239.36.10
ns4.google.com.         180321  IN      A       216.239.38.10

;; Query time: 310 msec
;; SERVER: 161.142.2.17#53(161.142.2.17)
;; WHEN: Sat Nov 27 23:38:48 2004
;; MSG SIZE  rcvd: 164