Timing issue (?) with wg-quick up on Raspberry Pi B+
uberscubajim at gmail.com
Mon Sep 11 01:23:11 CEST 2017
On 10/09/17 23:25, Jason A. Donenfeld wrote:
> I just wrote the attached script, which will tell you all the
> processes that have an open netlink socket...
> There's a bit too much fluff in there on a desktop system, but I
> imagine the pi might help boil it down to a few candidates. Probably
> we'll determine it's an ifplugd/ifupdown.action thing, but we'll see.
Many thanks again for such great work. Here's the output of the
netlistenerwho.sh program. It's awash with potential culprits!
PID TTY STAT TIME COMMAND
1 ? Ss 2:35 /sbin/init
128 ? Ss 0:01 /lib/systemd/systemd-udevd
770 ? Ss 2:24 /sbin/dhcpcd -q -b
783 ? Ss 0:15 avahi-daemon: running [janus.local]
840 ? Ss 0:32 /lib/systemd/systemd-logind
896 ? Ss 10:19 /usr/sbin/ntpd -p /var/run/ntpd.pid -g -u
906 ? S 0:02 /usr/sbin/dnsmasq -x
/run/dnsmasq/dnsmasq.pid -u dnsmasq -r /run/dnsmasq/resolv.conf -7
1204 ? Ss 0:00 /lib/systemd/systemd --user
18942 ? Ss 0:00 /lib/systemd/systemd --user
I also made a great mistake earlier: the problematic system is the
version of Raspbian based on begin *8* and /not/ *9*. Debian 9 works fine!
I've tweaked the /etc/network/interfaces file to have the line “iface
wg0 inet manual” in it so we /shouldn't/ get DHCP running or anything…
I tried the nlmon trick but I got the response “RTNETLINK answers:
Operation not supported” which isn't too helpful.
After some more playing I've found that running the wg-quick script's
commands by hand works. But then, I'm /manually/ entering them and that
I note you perform the ”ip link set wg0 up” /after/ the “ip address add
192.168.2.3/32 dev wg0” and “ip link set mtu 1420 dev wg0”. /However,
/the act of creating the interface with the “ip link add wg0 type
wireguard” seems to trigger the ip up automatically. The log files give:
Sep 10 23:57:51 janus kernel: wireguard: WireGuard 0.0.20170907 loaded.
See www.wireguard.com for information.
Sep 10 23:57:51 janus kernel: wireguard: Copyright (C) 2015-2017 Jason
A. Donenfeld <Jason at zx2c4.com>. All Rights Reserved.
Sep 10 23:57:51 janus ifplugd(wg0): ifplugd 0.28 initializing.
Sep 10 23:57:51 janus ifplugd(wg0): Using interface
Sep 10 23:57:51 janus ifplugd(wg0): Using detection mode: IFF_RUNNING
Sep 10 23:57:51 janus ifplugd(wg0): Initialization complete, link
Sep 10 23:57:52 janus ifplugd(wg0): Executing
'/etc/ifplugd/ifplugd.action wg0 up'.
Sep 10 23:57:52 janus ifplugd(wg0): client: /sbin/ifup: interface
wg0 already configured
Sep 10 23:57:52 janus ifplugd(wg0): Program executed successfully.
Which could well be interesting. I manually ran ifdown then ifup on wg0
and it /didn't/ lose its IP address.
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