We are running into trouble with more than 100 virtual tunnel devices . The reported problem is as follows:
Reported Failure in /var/log/syslog Jul 1 06:30:19 1100PRVC001 openvpn[15520]: OpenVPN 1.5.0 i386-rpm-linux [SSL] [LZO] [PTHREAD] built on Mar 4 2004 Jul 1 06:30:19 1100PRVC001 openvpn[15520]: Note: Cannot ioctl TUNSETIFF tun: Too many open files in system (errno=23) Jul 1 06:30:19 1100PRVC001 openvpn[15520]: Note: Attempting fallback to kernel 2.2 TUN/TAP interface Jul 1 06:30:19 1100PRVC001 openvpn[15520]: Cannot allocate TUN/TAP dev dynamically Jul 1 06:30:19 1100PRVC001 openvpn[15520]: Exiting max file-handles ist set to 16384 You can reproduce the failure by starting openvpn with: openvpn --dev-node /dev/net/tun --port 5000& openvpn --dev-node /dev/net/tun --port 5001& openvpn --dev-node /dev/net/tun --port 5002& .... .... openvpn --dev-node /dev/net/tun --port 5099& openvpn --dev-node /dev/net/tun --port 5100& Distribution ist Debian Woody 3.0 r2 (Kernel 2.4.18) openvpn 1.5.0-2 (rpm-Package, converted via alien to deb-package) Is there any known Limitation to 100 TUN-Devices or how can we break that limitation? Thanks Jürg von Büren IT Systeme AMAG Automobil- und Motoren AG, Informatik, Dällikerstr. 34, CH-8107 Buchs juerg.vonbue...@amag.ch
