Hi, I'm trying to setup ocserv [0], the OpenConnect VPN server on DragonFly BSD, and I almost make it work, except for some PF configurations.
However, I found there are some problems about the "tun" pseudo device. Once ocserv created a connection with a client, there will be a new "tun?" interface created, e.g., "tun4", which will normally be destroyed on disconnection. But I got the following error message from ocserv: ------------------------------------------------------------------------ ocserv[560756]: main[aly]: xxx.xxx.xxx.xxx:xxxx user disconnected (reason: user disconnected, rx: xxxx, tx: xxxx) ocserv[560756]: main: tun.c:680: tun4: Error destroying interface: Invalid argument ------------------------------------------------------------------------ Currently, I have a bunch of "tun?" devices left under "/dev" and "tun?" interfaces: ------------------------------------------------------------------------ # ifconfig ... tun0: flags=8010<POINTOPOINT,MULTICAST> mtu 1500 tun4: flags=8010<POINTOPOINT,MULTICAST> mtu 1162 tun5: flags=8010<POINTOPOINT,MULTICAST> mtu 1162 tun6: flags=8010<POINTOPOINT,MULTICAST> mtu 1162 tun7: flags=8010<POINTOPOINT,MULTICAST> mtu 1162 tun8: flags=8010<POINTOPOINT,MULTICAST> mtu 1162 tun9: flags=8010<POINTOPOINT,MULTICAST> mtu 1162 # ll /dev/tun* crw------- 1 uucp dialer 29, 0xffff00ff Apr 28 10:16 /dev/tun crw------- 1 uucp dialer 29, 0x00000000 Jun 2 23:38 /dev/tun0 crw------- 1 uucp dialer 29, 0x00000001 Apr 28 10:16 /dev/tun1 crw------- 1 uucp dialer 29, 0x00000002 Apr 28 10:16 /dev/tun2 crw------- 1 uucp dialer 29, 0x00000003 Apr 28 10:16 /dev/tun3 crw------- 1 uucp dialer 29, 0x00000004 Jul 8 16:44 /dev/tun4 crw------- 1 uucp dialer 29, 0x00000004 Jul 8 16:49 /dev/tun5 crw------- 1 uucp dialer 29, 0x00000004 Jul 8 18:45 /dev/tun6 crw------- 1 uucp dialer 29, 0x00000004 Jul 8 18:53 /dev/tun7 crw------- 1 uucp dialer 29, 0x00000004 Jul 8 18:56 /dev/tun8 crw------- 1 uucp dialer 29, 0x00000004 Jul 8 19:00 /dev/tun9 ------------------------------------------------------------------------ (NOTE: the "tun0" interface was previously created and left by OpenVPN.) When I tried to manually destroy the "tun?" interfaces using "ifconfig": ------------------------------------------------------------------------ # ifconfig tun4 destropy ifconfig: SIOCIFDESTROY: Invalid argument ------------------------------------------------------------------------ On the other hand, I cannot create a new "tun?" interface with "ifconfig": ------------------------------------------------------------------------ # ifconfig tun10 create ifconfig: SIOCIFCREATE2: Invalid argument # ifconfig tun create ifconfig: SIOCIFCREATE2: Invalid argument ------------------------------------------------------------------------ I tested these problems both on DragonFly BSD 4.8.0-RELEASE and 4.9- DEVELOPMENT (Jun-8). Also there is a mail reporting a similar issue on 2008-Aug [1], but got no response. [0] ocserv: https://www.infradead.org/ocserv/ [1] http://lists.dragonflybsd.org/pipermail/users/2014-August/290221.html Regards, -- Aly
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