Re: kern/57155: OpenVPN (tap and tun) doesn't run as expected on 10.0_BETA

[BERTRAND Joël <joel.bertrand%systella.fr@localhost>]

The following reply was made to PR kern/57155; it has been noted by GNATS.

From: =?UTF-8?Q?BERTRAND_Jo=c3=abl?= <joel.bertrand%systella.fr@localhost>
To: gnats-bugs%netbsd.org@localhost, kern-bug-people%netbsd.org@localhost, gnats-admin%netbsd.org@localhost,
        netbsd-bugs%netbsd.org@localhost
Cc: 
Subject: Re: kern/57155: OpenVPN (tap and tun) doesn't run as expected on
 10.0_BETA
Date: Wed, 4 Jan 2023 10:45:10 +0100

 	I have tested your configuration between my VM (OpenVPN client) and
 host that runs this VM (OpenVPN server).
 
 	Thus client and server run on the same physical workstation. Server in
 host (Linux devuan/testing), client in KVM guest (NetBSD 10.0). I use
 TCP to avoid NAT issue. Of course, I have checked that packets are not
 blocked.
 
 Server:
 Root hilbert:[~] > openvpn --dev tun1 --ifconfig 10.4.0.1 10.4.0.2
 --verb 10 --proto tcp-server
 
 Client:
 netbsd-test1# openvpn --remote 192.168.10.103 --dev tun1 --ifconfig
 10.4.0.2 10.4.0.1 --verb 10 --float --ping 10 --proto tcp-client
 
 	I can ping server from client and client from server.
 
 	Now, I use another OpenVPN server, on a different host.
 
 legendre# openvpn --dev tun1 --ifconfig 10.4.0.1 10.4.0.2 --verb 10
 --proto tcp-server
 
 	tcpdump -i wm0 -p port 1194 on client shows packets in both directions.
 
 	On legendre (NetBSD 10.0), tun1 is up and configured, but OpenVPN
 client is not accessible:
 
 legendre:[~] > ifconfig tun1
 tun1: flags=0x8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1500
         status: active
         inet6 fe80::b696:91ff:fe92:776e%tun1/64 ->  flags 0 scopeid 0xb
         inet 10.4.0.1/32 -> 10.4.0.2 flags 0
 legendre:[~] > ping 10.4.0.2
 PING 10.4.0.2 (10.4.0.2): 56 data bytes
 ^C
 ----10.4.0.2 PING Statistics----
 5 packets transmitted, 0 packets received, 100.0% packet loss
 legendre:[~] > route show
 Routing tables
 ...
 10.4.0.1           tun1               UHl         -        -      - lo0
 10.4.0.2           10.4.0.1           UH          -        -      - tun1
 ...
 
 	Regards,
 
 	JKB