[Dnsmasq-discuss] Synth domain prefix bug in dhcp different from dns.

[Simon Kelley]

I wouldn't expect the dnsmasq DHCP server to return these hostnames at 
all, so something unexpected is happening. Are sure the clients aren't 
doing a reverse-DNS lookup on their assigned address, or something similar?


Setting --log-queries and --log-dhcp and posting the results (or sending 
them to me) may help to make things clearer.

Simon.


On 01/08/2022 00:32, Jack Bennett via Dnsmasq-discuss wrote:
> synth-domain and known-hosts don't create the expected dhcp hostname for 
> the DHCP ACK.
> 
> With the use of *--synth-domain=thekelleys.org.uk 
> <http://thekelleys.org.uk/>,192.168.0.50,192.168.0.70,node-** and 
> *--dhcp-host=00:00:5e:00:53:af,192.168.0.55,24h* results in a lease 
> of*node-192-168-0-55.thekelleys.org.uk 
> <http://node-192-168-0-55.thekelleys.org.uk/>* instead of the expected 
> *node-5.thekelleys.org.uk <http://node-5.thekelleys.org.uk/>* in the 
> DHCPACK response.
> 
> The same goes for *--dhcp-host=00:00:5e:00:53:af,24h *the lease hostname 
> is *node-192-168-0-50.thekelleys.org.uk 
> <http://node-192-168-0-50.thekelleys.org.uk/>* instead of: 
> *node-0.thekelleys.org.uk <http://node-0.thekelleys.org.uk/>*
> 
> The dns seemed to resolve as expected for either address, my issue is 
> with the dhcp packet hostname value.
> 
> -- 
> Jack Bennett
> 
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