DHCP bug when assigning multiple DNS servers?

When specifying multiple DNS servers in DHCP…

Only one DNS server is assigned:

1 Like

I have made a test and it is real situation that assigned DNS for pushing to clients doesnot write in /etc/dnsmasq.conf file .
Moreover it write config to db :
db dhcp show


I have attached log file of DNSMASQ starts :

Sep 18 22:22:39 nethserver dnsmasq[6912]: started, version 2.48 cachesize 4000
Sep 18 22:22:39 nethserver dnsmasq[6912]: compile time options: IPv6 GNU-getopt DBus no-I18N DHCP TFTP "--bind-interfaces with SO_BINDTODEVICE"
Sep 18 22:22:39 nethserver dnsmasq-dhcp[6912]: DHCP, IP range --, lease time 15m
Sep 18 22:22:39 nethserver dnsmasq-tftp[6912]: TFTP root is /var/lib/tftpboot
Sep 18 22:22:39 nethserver dnsmasq[6912]: using nameserver
Sep 18 22:22:39 nethserver dnsmasq[6912]: read /etc/hosts - 6 addresses
Sep 18 22:22:39 nethserver dnsmasq-dhcp[6912]: read /etc/ethers - 2 addresses
Sep 18 22:22:39 nethserver dnsmasq[6912]: read /etc/dnsmasq-dhcp-hosts
1 Like

@giacomo are multiple dns supported yet? On dhcp advanced panel.

1 Like

I think that for the DHCP clients there is only one DNS that can be specified. For the NS itself you can put more DNS resolvers.
This is by design i think…

Seems pretty clear that it’s a bug. It’s always a good idea to have the ability to specify multiple DNS servers. Not to mention the fact that the window says “DNS servers” not “DNS server”.

Hi guys,

What is the reason to have in LAN (in this case DHCP for GREEN) multiple DNS and moreover, external DNS?
If you set two external DNS in NS (Configuration -> DNS) it is not enough?
NS will forward DNS requests from GREEN (LAN) or BLUE (Wireless) to RED (WAN). Or not?

1 Like

You see if this function exist it should work. Sometimes it is needed to specify client custom DNS server and push it by DHCP

1 Like

“By design”, Not yet implemented by the devs yet.
And having more DNS servers as GG_jr sayed (external servers) sometimes has undesired effects (like bypassing the proxy and allowing the user to reach banned sites etc) …

I’m not sure, but it is better to wait and see if the developers can fix this.


Maybe it is not devel problem, it is that problem with QA that i have mentioned on Hangout. We should have open QA test cases.


I think is a bug in dnsmasq template, sadly the man is not clear enough.

@Adam can you try this template-custom and check if is it working?

Create the template-custom dir and create a file named 30dhcp with the content from here: http://paste.ubuntu.com/12512879/

For the template custom:
mkdir -p /etc/e-smith/templates-custom/etc/dnsmasq.conf
copy pastbin content in /etc/e-smith/templates-custom/etc/dnsmasq.conf/30dhcp

Reference: http://stackoverflow.com/questions/12713785/cant-get-dnsmasq-dhcp-to-configure-multiple-name-servers

1 Like

Looks like that worked! :smile:

New bug created: http://dev.nethserver.org/issues/3262

1 Like

Bug is on QA status @vcc, @mabeleira, @medworthy, @dz00te, @fasttech, @GG_jr, @Adam is your turn! :construction_worker: :construction_worker: :construction_worker: :construction_worker: :construction_worker:

Verified by @dz00te
Thanks to all of you, great work :sunglasses: