[Dnsmasq-discuss] DHCP server not assigning IP to RTMU86

[Simon Kelley]

On 15/05/2022 15:40, Kamil via Dnsmasq-discuss wrote:

> PS. I've read in FAQ about 255.255.255.255 broadcast and invalid 
> firewall rules, but I don't have any firewall rules and I'm not changing 
> network config files when switching to isc-dhcp-server (which I use as a 
> benchmark)
> 

ISC dhcpd bypasses the firewall rules to receive that sort of broadcast 
packet and dnsmasq doesn't, so the fact that it works with ISC and not 
with dnsmasq is a strong hint that a firewall rule dropping destination 
255.255.255.255 and/or source 0.0.0.0 may well be the problem.

What does the output of

iptables -L

look like?


Cheers,

Simon.


> Kind regards,
> Kamil
> 
> 
> 
>     Groeten
>     Geert Stappers
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