SOLVED Wrong nameserver in jails

[nasuser12]

Hi all,

I'm having some problems with my jails. Everything was working correctly until I found I could not connect to most sites from within some of my jails. I appears that the nameservers (DNS) are setup incorrectly within these jails. I cannot ping www.google.com, but can ping its ip addresses. Outside my jails everything is fine and I can ping both ip addresses and urls.

I cannot find where I can set the nameserver for jails. Does anyone know?

Some details:
Of my 9 jails (2 portjails and 7 pluginjails), 5 appear to not be able to do name server lookup.
My modem's ip address is 192.168.178.1 and this is set as my default gateway in Freenas. The ip-addresses of my jails are not used by other devices in my network. Any help is greatly appreciated!

Best regards!

Code:

[root@freenas] ~# cat /etc/resolv.conf
search local
nameserver 192.168.178.1
nameserver 8.8.8.8
nameserver 8.8.4.4
[root@freenas] ~# nslookup www.google.com
Server:     8.8.8.8
Address:   8.8.8.8#53

Non-authoritative answer:
Name:   www.google.com
Address: 74.125.136.106
Name:   www.google.com
Address: 74.125.136.105
Name:   www.google.com
Address: 74.125.136.103
Name:   www.google.com
Address: 74.125.136.99
Name:   www.google.com
Address: 74.125.136.147
Name:   www.google.com
Address: 74.125.136.104

Code:

root@customplugin_1:/ # cat /etc/resolv.conf
search local
nameserver 213.51.129.37
nameserver 213.51.144.37
nameserver 83.80.1.236

root@customplugin_1:/ # nslookup www.google.com
;; Got recursion not available from 83.80.1.236, trying next server
;; connection timed out; no servers could be reached

 

[dlavigne]

If the jail was created with vimage, it has its own networking stack, meaning you have to set up DNS in the jail's /etc/resolv.conf and its default gateway in /etc/rc.conf. Any particular reason why the DNS server IPs are different in the jail? e.g. 8.8.8.8 should work, assuming the jail has a default gateway.

 

[nasuser12]

Manually changing the DNS server ip addresses using vi solved the problem! I still have no idea how and why they were changed from their original ones, but it all functions correctly now.

 

[nemo1478]

But what happens when you restart the jail or reboot FreeNAS? Does the DNS info you added remain?

 

[dlavigne]

In the jail, yes, as it is stored in the jail itself and is not stored in the FreeNAS config database.

 

[nemo1478]

Great! I applied this fix to a problem I was having and now all my issues have been resolved. Thank you.