Re: Can Network Manager be used for router-type configurations?

[Nick Howitt <nick howitts co uk>]

On 03/04/2018 12:50, Thomas Haller wrote:
> On Mon, 2018-04-02 at 16:46 +0100, Nick Howitt wrote:
>
> Hi Nick,
>
>
> > > > 1 - change the DHCP server range of addresses for a Wireless
> > > > Hotspot
> > > You can do that by configuring a static/manual IP address. That
> > > address
> > > is assigned to the router, and the same subnet is shared. Explained
> > > in
> > > `man nm-settings`.
> > If I set the interface with an address and /24 subnet I see the DHCP
> > server using that subnet, but it always seems to use .10-.254 for
> > its
> > available address range. From your link in 3 below, can I pass the
> > parameters "first" and "last" to the script or are they hard coded?
> They depend on the address that you set, see examples at:
> https://cgit.freedesktop.org/NetworkManager/NetworkManager/tree/src/dnsmasq/tests/test-dnsmasq-utils.c?id=eb8257dea5802a004af9cccacb30af98440e2172#n122
>
> (older versions behaved slightly different: 
> https://cgit.freedesktop.org/NetworkManager/NetworkManager/commit/?id=d512ed9f1f1353166ae2110e2e6ffeb3d5f624d7
>  )
I'll have a look
> > > > 2 - get WPA/PSK to work on the hotspot (it would configure bit
> > > > not
> > > > allow
> > > > connections)
> > > Not sure what you are doing. WPA/PSK hotspot works for me with NM.
> > I'll have to try again. Configuring as WEP worked. Changing to WPA
> > and
> > changing the PSK never allowed a connection from Android. I also
> > tried a
> > simplistic configuration at the command line:
> > nmcli c add type wifi ifname wlp0s18f2u2 con-name nick autoconnect
> > no
> > ssid TEST
> > nmcli connection modify nick 802-11-wireless.mode ap
> > 802-11-wireless.band bg ipv4.method shared
> > nmcli connection modify nick wifi-sec.key-mgmt wpa-psk
> > nmcli connection modify nick wifi-sec.psk "12345678"
> > nmcli connection up nick
> >
> > but no dice.
> if you do this, ipv6.method will be "auto". That (usually) will not
> work. Set it to "ignore" or "shared".
Good idea to try.
> An alternative might be to create the profile with `nmcli device wifi
> hotspot` or the hotspot button in gnome-shell (and adjust it from
> there).
I tried but could only connect using WEP configured with 
nm-connection-editor and not nmtui (on Centos7.4). Using the Hotspot 
button created other complications by adding extra connection 
definitions and I lost where I was. From memory even 
nm-connection-editor and nmtui may have caused problems when trying to 
redefine a current interface to a Hotspot.
> best,
> Thomas