how to configure ubuntu 22.04 clients with synology dns server

feder

2/21/24, 11:39 AM

I've got the latest Synology and several Ubuntu 22.04 (fully updated) but empty.

installed Synology's own DNS server: example.local
installed Synology's own DHCP server.

The client do get an IP of the DHCP range I dedicated for them. Nice. But they do not get the domain options delivered so that I could resolve the FQDN with hostname -f. It simply shows the hostname that I've set in the client's hostname file. /etc/hostname

The resolv.conf shows merely:

nameserver 127.0.0.53
options edns0 trust-ad
search example.local

(That is an arbitrary nameserver as well. My name/dns server is 10.0.0.10)

A ping from one client to another would result in:

ping worker-s-05

ping: worker-s-05: Temporary failure in name resolution

... or ...

ping worker-s-05.example.local
ping: worker-s-05.example.local: Name or service not known

I've added vendor (Ubuntu22.04) options to the DHCP Server, hoping that the synolgy dhcp server would broadcast the DNS/DHCP options to the clients and the clients would accept them.

64: example.local
15: example.local
65: 10.0.0.10 <-- my synology/dns/dhcp server ip
6: 10.0.0.10
119: example.local

Is there anything else I could do for my Ubuntu 22.04 clients to accept the domain example.local and resolve to a FQDN?

0 + 3

dns

dhcp

22.04

24601

2/21/24, 12:52 PM

isn't this really a question for [Synology community](https://community.synology.com/enu/forum/1) The ubuntu client is less significant in this context.

feder

2/21/24, 1:19 PM

@24601 maybe, but I would like to understand what the ubuntu client requires to accept the DHCP/DNS options. Is there limitations? requirements on what to enable to accept certain options? However, I just don't want to neglect the client error space.

24601

2/21/24, 2:43 PM

I think it would be the same for any Linux client so not Ubuntu specific. When I have asked questions in the Synology Community before, they have been most helpful in successfully recommending courses of action. Worth asking them tbh.

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