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davesteele / comitup

Bootstrap Wifi support over Wifi
https://davesteele.github.io/comitup/
GNU General Public License v2.0
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Static IP configuration gets in the way with a network manager shared interface #52

Closed muelli closed 5 years ago

muelli commented 5 years ago

I am trying to bring comitup to a raspberry pi. In order to access the headless raspberry pi, I have a PC with two NICs. On that PC I have configured the second NIC through network manager to share the Internet connection of the other NIC. Network manager seems to use IP addresses in the range of 10.42.0.1/32 for the clients connecting through the second interface. This is the exact range that comitup uses :( I think I experience problems due the IP network ranges being the same.

Would it be possible to detect whether the IP addresses comitup wants to hand out to its clients clashes with a subnet the device is already part of? As a stop-gap measure, using a different range than the one network manager uses by default might be okay.

FWIW: I have been able to convince network manager to hand out different IPs: https://askubuntu.com/a/829759/207933 but still think that it'd be valuable if comitup did not hand out IPs that it can't handle.

davesteele commented 5 years ago

I'm not sure I follow. Are we talking about #49?

If not, 10.42.0.0/24 is also hard coded into Comitup (copied from NM). It could be changed, made into a config parameter.

muelli commented 5 years ago

I'm not sure I follow. Are we talking about #49?

sorry for not being more precise :-/

If not, 10.42.0.0/24 is also hard coded into Comitup (copied from NM). It could be changed, made into a config parameter.

yeah, I'm talking about the hardcoded information which I suspect causes a conflict when plugging the ethernet cable of the Raspberry Pi (with Comitup running) into a port on a PC using network-manager to share an Internet connection. I think Comitup cannot work as expected if the Raspberry Pi's wired network interface has an IP address in the same subnet which is used for connecting to wireless clients. So using a working subnet would be best.

muelli commented 5 years ago

cool. thanks.

This works for as long as there is no interface with that subnet. The odds are small, but it might happen.