Hi all,
I'm trying to get some dnsmaq stuff working on my desktop machine (Kubuntu).
I've got a wifi interface that is my default (and only) route to the Internet.
I've also got a wired ethernet interface that I want to use to:
- provide DHCP service to a headless server
- provide NAT to that headless server so that it can connect to the internet
I've setup a dnsmasq config (using the defaults, but with some
tweaks), but whilst it does actually serve DHCP to a laptop (for
testing), it appears to set 2 default routes on my desktop, and I can
no longer get onto the Internet.
Routing table while dnsmasq was running:
srdjan@serenity:~$ route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
default dsldevice.lan 0.0.0.0 UG 100 0 0 enp37s0
default dsldevice.lan 0.0.0.0 UG 600 0 0 wlp38s0
link-local 0.0.0.0 255.255.0.0 U 1000 0 0 docker0
172.17.0.0 0.0.0.0 255.255.0.0 U 0 0 0 docker0
192.168.1.0 0.0.0.0 255.255.255.0 U 600 0 0 wlp38s0
dsldevice.lan 0.0.0.0 255.255.255.255 UH 100 0 0 enp37s0
192.168.2.0 0.0.0.0 255.255.255.0 U 100 0 0 enp37s0
I'm not sure this is correct. Dhcp-option 3 and 6 were left as
default, but I would have expected the impact of those to be felt on
the client machine trying to get the IP address, and not the "server"
(desktop). Perhaps option 3 might make sense to set to the same
address as the wifi router?
Once I tore down both enp37s0 and wlp38s0, and reconnected on wifi
using the KDE network manager, did I manage to get back onto the
internet.
Of note, the default config uses:
interface=enp37s0
port=0
dns-range that is on a different network to the usual wifi one
Has anyone got any suggestions please on what plainly stupid thing I'm
doing with my setup?
Thanks,
Srdjan
