[SOLVED] Wireguard RTNETLINK

unInstance · 01-03-2020, 07:36 PM

I would like to ask what should I do to avoid writing wg-quick up each time. How to make it autostart?

abga · 01-03-2020, 07:54 PM

If you want to bring your VPN up automatically when the system starts and there are no VPN depending services, then adding your commands in /etc/rc.d/rc.local (which is executed at the end of the system init) should do it.
http://www.slackware.com/config/init.php

You could write your own rc script (including start stop functions), make it executable and put it in /etc/rc.d/ and then call it from the very beginning of /etc/rc.d/rc.inet2
Use the simple /etc/rc.d/rc.crond for inspiration about the structure.

P.S. Or, you could use NetworkManager to control your wireguard VPN. I have no experience with it, but it looks like supporting wireguard:
https://blogs.gnome.org/thaller/2019...etworkmanager/

abga · 01-03-2020, 10:21 PM

Quote:

Originally Posted by avian

I thought of that, but that "file exists" message appears even on a fresh boot, or when toggling ::/0 but keeping ipv6 when reloading.

User added routing tables shouldn't persist after a reboot, but only the defaults to be found in /etc/iproute2/rt_tables
I just tested your reported problem under the stock 4.4.202 kernel and can confirm it. It looks like it's again caused by the already identified kernel limitation (CONFIG_IPV6_MULTIPLE_TABLES not enabled).

Code:

# ip -6 route flush ::/0 dev eth0 table 51820
# ip -6 route add ::/0 dev eth0 table 51820
RTNETLINK answers: File exists
# ip -6 route show table all | grep 51820
### no results!
### Then, testing the IPv4
#ip -4 route add 10.0.1.0/24 dev eth0 table 51820
#ip -4 route show table all | grep 51820
10.0.1.0/24 dev eth0  table 51820  scope link

In this respect, "RTNETLINK answers: File exists" - should mean: "I can't create that table, go away!"

Then under a kernel where CONFIG_IPV6_MULTIPLE_TABLES=y it works properly:

Code:

# ip -6 route add ::/0 dev eth0 table 51820
# ip -6 route show table all | grep 51820
default dev eth0 table 51820 metric 1024 pref medium
# ip -6 route flush ::/0 dev eth0 table 51820
# ip -6 route show table all | grep 51820
### no results, table cleaned!