Date: Wed, 15 Nov 2023 07:14:53 +0100 (GMT+01:00) From: Alexander Burke <alex@alexburke.ca> To: questions@freebsd.org Cc: Matthias Apitz <guru@unixarea.de> Subject: Re: USB tethering between FreeBSD and mobile phone (Debian OS) Message-ID: <a81ca97b-018c-4591-a37d-371e366f3ab6@alexburke.ca> In-Reply-To: <ZVRavIq94cFxdAV4@c720-1400094.fritz.box> References: <ZVMO/8ord7UwUxnz@pureos> <65b7ecef-b189-4350-a246-3cab934151fd@alexburke.ca> <091f7b66-ce45-4cf4-a4a9-6cd1de66c09b@qeng-ho.org> <ZVOm1vDEYf9HUril@c720-1400094.fritz.box> <ZVRavIq94cFxdAV4@c720-1400094.fritz.box>
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Hi Matthias (and anyone who comes across this later),
The DHCP server should be run on the device capable of acting as an interne=
t gateway (in this case, the phone) or else the setup is backwards from eve=
ry setup I've come across in 25 years in IT. (In fact, your phone probably =
already had dhcpd installed for exactly that reason.)
As an added benefit, nothing needs to be built or installed on the FreeBSD =
side, and one line needs to be added to /etc/rc.conf, as previously explain=
ed.
Why swim against the current and make things more complex than they need to=
be?
Cheers,
Alex
----------------------------------------
Nov 15, 2023 06:44:34 Matthias Apitz <guru@unixarea.de>:
>=20
> Just to end this thread:
>=20
>=20
> How to tether the mobile phone Purism Librem 5 with FreeBSD
> guru@unixarea.de, November 2023
>=20
> The Purism Librem 5 (L5) runs PureOS, a Debian variant, but no DHCP serve=
r.
> When an USB-C cable connection between the laptop and the L5 is made, the
> NetworkManager in the L5 sees the carrier in the network interface 'usb0'
> and launches a DHCP client on the interface. All we have to do, or what
> can be done, is launching a DHCP server on the interface 'ue0'. Here is
> it's configuration.
>=20
> Build and install the port net/isc-dhcp44-server.
>=20
> We just use one of the existing example configuration from
> /usr/local/etc/dhcpd.conf:
>=20
> ...
> # A slightly different configuration for an internal subnet.
> subnet 10.5.5.0 netmask 255.255.255.224 {
> =C2=A0 range 10.5.5.26 10.5.5.30;
> =C2=A0 option domain-name-servers ns1.internal.example.org;
> =C2=A0 option domain-name "internal.example.org";
> =C2=A0 option routers 10.5.5.1;
> =C2=A0 option broadcast-address 10.5.5.31;
> =C2=A0 default-lease-time 600;
> =C2=A0 max-lease-time 7200;
> }
> ...
>=20
> Lines for /etc/rc.conf:
>=20
> ifconfig_ue0=3D"inet 10.5.5.26 netmask 255.255.255.224"
> dhcpd_enable=3D"YES"
> dhcpd_ifaces=3D"ue0"
>=20
> And at the end we let devd(8) do its job when the USB-C connection is mad=
e
> with this configuration:
>=20
> /usr/local/etc/devd/l5.conf:
>=20
> notify 1 {
> =C2=A0=C2=A0=C2=A0 match "system"=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0 "IFNET";
> =C2=A0=C2=A0=C2=A0 match "subsystem"=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
"ue0";
> =C2=A0=C2=A0=C2=A0 match "type"=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0 "ATTACH";
> =C2=A0=C2=A0=C2=A0 action "/usr/local/etc/devd/l5.sh";
> };
>=20
> /usr/local/etc/devd/l5.sh:
>=20
> #!/bin/sh
> #
> ifconfig ue0 inet 10.5.5.26 netmask 255.255.255.224
> /usr/local/etc/rc.d/isc-dhcpd restart
>=20
>=20
>=20
> Now you can run from the laptop
>=20
> ssh purism@10.5.5.27
>=20
> and from there back:
>=20
> ssh guru@10.5.5.26
>=20
>=20
>=20
> --=20
> Matthias Apitz, =E2=9C=89 guru@unixarea.de, http://www.unixarea.de/ +49-1=
76-38902045
> Public GnuPG key: http://www.unixarea.de/key.pub
>=20
> I am not at war with Russia.
> =D0=AF =D0=BD=D0=B5 =D0=B2=D0=BE=D1=8E=D1=8E =D1=81 =D0=A0=D0=BE=D1=81=D1=
=81=D0=B8=D0=B5=D0=B9.
> Ich bin nicht im Krieg mit Russland.
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