[Bug 227086] Upgraded world - broken OpenVPN second tun - ifconfig: ioctl (SIOCAIFADDR): File exists

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=227086

--- Comment #2 from Marek <zillion1 at o2.pl> ---
Hi Eugene,

I can test old revision only (home server "in production") :)
Some more outputs from working/current configuration:

# ifconfig tun0
tun0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> metric 0 mtu 1500
        options=80000<LINKSTATE>
        inet 10.20.20.1 --> 10.20.20.2  netmask 0xffffff00
        groups: tun
        Opened by PID 789

# ifconfig tun1
tun1: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> metric 0 mtu 1500
        options=80000<LINKSTATE>
        inet 10.20.20.10 --> 10.20.20.1  netmask 0xffffff00
        groups: tun
        Opened by PID 24835


# netstat -rn
Routing tables

Internet:
Destination        Gateway            Flags     Netif Expire
default            11.22.33.44        UGS        igb1
10.20.20.0/24      10.20.20.2         UGS        tun0
10.20.20.1         link#9             UH         tun1
10.20.20.2         link#5             UH         tun0
10.20.20.10        link#9             UHS         lo0
11.22.33.0/22      link#2             U          igb1
11.22.33.44        link#2             UHS         lo0
127.0.0.1          link#3             UH          lo0
192.168.0.0/24     link#1             U          igb0
192.168.0.1        link#1             UHS         lo0
192.168.8.0/24     link#4             U           ue0
192.168.8.100      link#4             UHS         lo0

# ps ax | grep openvpn
  789  -  Ss      1:01,30 /usr/local/sbin/openvpn --cd /usr/local/etc/openvpn
--daemon openvpn --config /usr/local/etc/openvpn/server.conf --writepid
/var/run/openvpn.pid
24835  -  Ss      0:06,92 /usr/local/sbin/openvpn --cd /usr/local/etc/openvpn
--daemon openvpn_client --config /usr/local/etc/openvpn/client.conf --writepid
/var/run/openvpn_client.pid


My home host is "master" OpenVPN server for about 20 other remote family
clients.
They're connecting to the server without any problems (after install world
there was no probem with them too).
The OpenVPN client (tun1) on master host is configured to listen some services
like mail, www, and couple of others.
Additionaly I have failover server in remote localization, so in case
connectivity problems to master host, the failover takes over with 10.20.20.1
IP address. Clients reconnect after some timeout to the failover.
The failover is not FreeBSD based system, and there's no services like mail,
www, and so on, its task is to keep connectivity beetween other clients if main
host is temporarily down.
To aviod unnecessary requests to the failover from clients, I created on master
host the VPN client next to server with 10.20.20.10 IP address.

Regards,
Marek

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