[kwlug-disc] Remote access to machine behind CG-NAT

[Anton Avramov]

I use dnsmasq in more than a thousand systems along systemd-resolved for 
dns, dhcp and tftp without a problem for years.

For the DHCP to get activated you need to define a dhcp-range=. The 
range should be accessible to the static ip of the interface you want to 
use.

If using firewall you would have to open the appropriate ports also.

hope this helps, I'm writhing from the beach and its tricky to be more 
specific, but if you still get problems let me know and I`ll try to give 
exact examples.

Cheers

On 2025-06-27 11:00 p.m., Chris Frey wrote:
> On Fri, Jun 27, 2025 at 11:41:46AM -0400, Khalid Baheyeldin wrote:
>> I disabled systemd-resolved, and removed /etc/resolv.conf
> I've found systemd-resolved to be very sticky.  Make sure you try to
> 'dig' at your own address to make sure nothing is listening before
> you start up dnsmasq.
>
>
>> Using this in my /etc/dnsmasq.d/local.conf
>>
>> bind-interfaces
>> bogus-priv
>> domain-needed
>> no-resolv
>> no-poll
>> domain=home.priv
>> local=/home.priv/
>> expand-hosts
>> server=9.9.9.9
>> server=1.1.1.1
> I don't know what your /etc/hosts file looks like, but I haven't found
> the need to use domain or local or expand-hosts.  I use full names in
> my /etc/hosts, such as circle.home.priv though.
>
> Example /etc/hosts:
> 192.168.1.5	htmx1.foursquare.net
> 192.168.1.5	htmx2.foursquare.net
>
> So no trailing dot, and no simple names.
>
> Note that you can run dnsmasq as a standalone command with the above
> options on the command line, just in case the default startup circuitry
> gets in the way.
>
> Also note that multiple dnsmasq's can be running at once if you have
> virtual machines going (they are primarily for dhcp).  Make sure they
> are all stopped to avoid confusion.
>
> - Chris
>
>
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