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OpenVPN Topics

GENERAL: RoutingRIP RoutingBridgingFAQFirewallVPN ChainingHigh-AvailabilityTroubleshootingDonationsIRC meetingsDeveloper DocsTester Docs
OS RELATED: FreeBSD Routed FreeBSD Bridged

Openvpn logo.png

OpenVPN is a full-featured open source SSL VPN solution that accommodates a wide range of configurations, including remote access, site-to-site VPNs, Wi-Fi security, and enterprise-scale remote access solutions with load balancing, failover, and fine-grained access-controls. Starting with the fundamental premise that complexity is the enemy of security, OpenVPN offers a cost-effective, lightweight alternative to other VPN technologies that is well-targeted for the SME and enterprise markets.

This page is designed to provide an applied-level of support. The OpenVPN HowTo has lots of great examples and configuration option.

Help with creating a VPN which connects multiple lans. Server and clients have lans behind them. This will help you understand how to use the route, push route, and iroute commands.

Client Software/Packages



OpenVPN is readily available through most distributions package managers. Gnome's network-manager can manage various types of VPN's, including OpenVPN through plugins.


Building custom Win32/64 OpenVPN installer

Related Links

DH Param Notes

Just for laughs, I generate three 4096-bit primes using openssl on three different systems; the results are here.

FreeBSD 8.0-RELEASE #0: Sat Nov 21 15:02:08 UTC 2009
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Intel(R) Xeon(R) CPU           E5530  @ 2.40GHz (2394.01-MHz K8-class CPU)

976.093u 0.060s 16:16.66 99.9%	494+1043k 7+0io 12pf+0w
FreeBSD 8.1-PRERELEASE #5: Tue Jul 13 14:10:29 CDT 2010 amd64
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Intel(R) Xeon(R) CPU           E5520  @ 2.27GHz (2261.01-MHz K8-class CPU)

685.101u 0.022s 11:25.47 99.9%  495+1037k 2+0io 6pf+0w
machdep.cpu.vendor: GenuineIntel
machdep.cpu.brand_string: Intel(R) Core(TM) i7 CPU       M 620  @ 2.67GHz
Darwin Swordfish.local 10.6.0 Darwin Kernel Version 10.6.0: Wed Nov 10 18:13:17 PST 2010; root:xnu-1504.9.26~3/RELEASE_I386 i386

2249.944u 1.799s 37:32.94 99.9%	0+0k 2+9io 0pf+0w