Re: lost connection on dynamic IP

[Vicente Bergas <vicencb@gmail.com>]

On Thu, May 20, 2021 at 9:23 PM Max Schulze <max.schulze@online.de> wrote:
> On 20.05.21 18:20, Roman Mamedov wrote:
> > On Thu, 20 May 2021 11:15:30 +0500
> > Roman Mamedov <rm@romanrm.net> wrote:
> >
> >>> So, what do you mean is that wireguard does a single DNS resolution at
> >>> the beginning and further DNS resolutions need to be done elsewere. Is
> >>> that correct?
> >> Yes.
> Just to point out what 'others are doing' - openwrt has a watchdog
> script [1] that might be run with cron every 15 mins
>
> */15 * * * * /usr/bin/wireguard_watchdog
>
> which will update the new endpoint if the last handshake is too old:
>
> wg set ${iface} peer ${public_key} endpoint
> "${endpoint_host}:${endpoint_port}"
>
> It needs PersistenKeepalive also, if i understand correctly.
>
> [1]
> https://git.openwrt.org/?p=openwrt/openwrt.git;a=blob;f=package/network/utils/wireguard-tools/files/wireguard_watchdog;hb=HEAD
>
> --
>
> Max

Hello, i've been running this script on a setup with a wg interface
with a single peer:
while true ; do
  sleep 300
  curr=$(date +%s)
  prev=$(wg show wg0 latest-handshakes | cut -f2)
  elapsed=$(( ${curr} - ${prev} ))
  [ ${elapsed} -ge 300 ] && wg syncconf wg0 /etc/wireguard/wg0.conf
done
on the client side for 3 days and the issue occurred once again.
This time the connection was restablished automatically and no manual
intervention was required.
Thank you Max and Roman.

Regards,
  Vicenç.