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@@ -0,0 +1,284 @@ +Installation instructions for OpenVPN, a Secure Tunneling Daemon + +Copyright (C) 2002-2005 OpenVPN Solutions LLC. This program is free software; +you can redistribute it and/or modify +it under the terms of the GNU General Public License version 2 +as published by the Free Software Foundation. + +************************************************************************* + +To download OpenVPN, go to: + + http://openvpn.net/download.html + +For step-by-step installation instructions with real-world +examples see: + + http://openvpn.net/howto.html + +For examples see: + + http://openvpn.net/examples.html + +************************************************************************* + +SUPPORTED PLATFORMS: + (1) Linux 2.2+ + (2) Solaris + (3) OpenBSD 3.0+ (Comes with OpenSSL and TUN devices by default) + (4) Mac OS X Darwin + (5) FreeBSD + (6) NetBSD + (7) Windows (Win 2K and higher) + +SUPPORTED PROCESSOR ARCHITECTURES: + In general, OpenVPN is word size and endian independent, so + most processors should be supported. Architectures known to + work include Intel x86, Alpha, Sparc, Amd64, and ARM. + +REQUIRES: + (1) TUN and/or TAP driver to allow user-space programs to control + a virtual point-to-point IP or Ethernet device. See + TUN/TAP Driver Configuration section below for more info. + +OPTIONAL (but recommended): + (1) OpenSSL library, necessary for encryption, version 0.9.5 or higher + required, available from http://www.openssl.org/ + (2) LZO real-time compression library, required for link compression, + available from http://www.oberhumer.com/opensource/lzo/ + OpenBSD users can use ports or packages to install lzo, but remember + to add "--with-lzo-headers" and "--with-lzo-lib" directives to + "configure", pointing to /usr/local/include and /usr/local/lib + respectively since gcc will not find them otherwise. + (3) Pthread library. + +OPTIONAL (for developers only): + (1) Autoconf 2.50 or higher + Automake 1.5 or higher + -- available from http://www.gnu.org/software/software.html + (2) Dmalloc library + -- available from http://dmalloc.com/ + +************************************************************************* + +BUILD COMMANDS FROM TARBALL: + + ./configure + make + make install + +************************************************************************* + +BUILD COMMANDS FROM CVS: + + autoreconf -i -v + ./configure + make + make install + +************************************************************************* + +BUILD A TARBALL FROM CVS: + + autoreconf -i -v + ./configure + make dist + +************************************************************************* + +LOOPBACK TESTS (after BUILD): + +make check (Run all tests below) + +Test Crypto: + +./openvpn --genkey --secret key +./openvpn --test-crypto --secret key + +Test SSL/TLS negotiations (runs for 2 minutes): + +./openvpn --config sample-config-files/loopback-client (In one window) +./openvpn --config sample-config-files/loopback-server (Simultaneously in another window) + +************************************************************************* + +OPTIONS for ./configure: + + --enable-pthread Compile pthread support for + improved latency during SSL/TLS key + negotiations (Linux or Solaris only) + + --disable-lzo Do not compile LZO compression support + --disable-crypto Do not compile OpenSSL crypto support + --disable-ssl Do not compile OpenSSL SSL support for + TLS-based key exchange + + --with-ssl-headers=DIR Crypto/SSL Include files location + --with-ssl-lib=DIR Crypto/SSL Library location + --with-lzo-headers=DIR LZO Include files location + --with-lzo-lib=DIR LZO Library location + + --with-ifconfig-path=PATH Path to ifconfig tool (only need to + specify if in a non-standard location) + + --with-leak-check=TYPE Build with memory leak checking + TYPE = dmalloc or ssl + + --enable-strict Enable strict compiler warnings + + --enable-strict-options Enable strict options check between peers + +************************************************************************* + +BUILDING ON LINUX 2.4+ FROM RPM + +You can build a binary RPM directly from the OpenVPN tarball file: + + rpmbuild -tb [tarball] + +This command will build a binary RPM file and place it in the system +RPM directory. You can then install the RPM with the standard RPM +install command: + + rpm -ivh [binary-rpm] + +When you install the binary RPM, it will install +sample-scripts/openvpn.init, which can be used to +automatically start or stop one or more OpenVPN tunnels on system +startup or shutdown, based on OpenVPN .conf files in /etc/openvpn. +See the comments in openvpn.init for more information. + +Installing the RPM will also configure the TUN/TAP device node +for linux 2.4. + +Note that the current openvpn.spec file, which instructs the rpm tool +how to build a package, will build OpenVPN with all options enabled, +including OpenSSL, LZO, and pthread linkage. Therefore all of +these packages will need to be present prior to the RPM build, unless +you edit the openvpn.spec file. + +************************************************************************* + +TUN/TAP Driver Configuration: + +* Linux 2.4 or higher (with integrated TUN/TAP driver): + + (1) make device node: mknod /dev/net/tun c 10 200 + (2a) add to /etc/modules.conf: alias char-major-10-200 tun + (2b) load driver: modprobe tun + (3) enable routing: echo 1 > /proc/sys/net/ipv4/ip_forward + + Note that either of steps (2a) or (2b) is sufficient. While (2a) + only needs to be done once per install, (2b) needs to be done once + per reboot. If you install from RPM (see above) and use the + openvpn.init script, these steps are taken care of for you. + +* Linux 2.2 or Solaris: + + You should obtain + version 1.1 of the TUN/TAP driver from + http://vtun.sourceforge.net/tun/ + and follow the installation instructions. + +* Solaris + + For 64 bit, I used the tun-1.1.tar.gz source and compiled it. + + Of course there is a but :) + In the tun-1-1\solaris\Makefile I changed a line so it compiles with 64 bit + + CFLAGS = $(DEFS) -m64 -O2 -Wall -D_KERNEL -I. + + I just added -m64 and it worked. + + The tun driver works fine as said previously, however we noticed there is a + minor problem when creating multiple tunnels on Solaris. + Mr Tycho Fruru changed the code in tun.c file where he locked the tun device + number to -1. This way it is impossible to specify the name of the tun device + but it is still possible to have multiple devices. + The modification will increment automatically meaning starting from tun0 ---> + tunX I know you are not responsible for the tun coding but if you think the + modification can be useful for you feel free to use it. + + http://openvpn.net/solaris/tun.c + +* FreeBSD 4.1.1+: + + FreeBSD ships with the TUN/TAP driver, and the device nodes for tap0, + tap1, tap2, tap3, tun0, tun1, tun2 and tun3 are made by default. + However, only the TUN driver is linked into the GENERIC kernel. + + To load the TAP driver, enter: + + kldload if_tap + + See man rc(8) to find out how you can do this at boot time. + + The easiest way is to install OpenVPN from the FreeBSD ports system, + the port includes a sample script to automatically load the TAP driver + at boot-up time. + +* OpenBSD: + + OpenBSD ships with tun0 and tun1 installed by default on pre-3.5 systems, + while 3.5 and later have dynamically created tun* devices so you only need + to create an empty /etc/hostname.tun0 (tun1, tun2 and so on) for each tun + you plan to use to create the device(s) at boot. + +* Mac OS X: + + 2005.02.13: Angelo Laub has developed a GUI for OS X: + + http://rechenknecht.net/OpenVPN-GUI/ + + 2004.10.26: Mattias Nissler has developed a new TUN/TAP driver for + MAC OS X: + + http://www-user.rhrk.uni-kl.de/~nissler/tuntap/ + + Christoph Pfisterer's old TUN driver can be obtained at + http://chrisp.de/en/projects/tunnel.html -- note that it + is no longer being maintained. + +* Solaris9 Sparc/64 + + The kernel module for solaris + can be generated by adding the -m64 switch to a modern + gcc compiler (I'm using 3.2) The resulting kernel driver + needs to be manually copied to /kernel/drv/sparcv9/ and then a + reconfiguration reboot. (boot -r). + +* Windows 2000 and XP + + See INSTALL-win32.txt for more info + + See the man page for more information, usage examples, and + information on firewall configuration. + +************************************************************************* + +CAVEATS & BUGS: + +* I have noticed cases where TCP sessions tunneled over the Linux + TAP driver (kernel 2.4.21 and 2.4.22) stall when lower --mssfix + values are used. The TCP sessions appear to unstall and resume + normally when the remote VPN endpoint is pinged. + +* If run through a firewall using OpenBSDs packet filter PF and the + filter rules include a "scrub" directive, you may get problems talking + to Linux hosts over the tunnel, since the scrubbing will kill packets + sent from Linux hosts if they are fragmented. This is usually seen as + tunnels where small packets and pings get through but large packets + and "regular traffic" don't. To circumvent this, add "no-df" to + the scrub directive so that the packet filter will let fragments with + the "dont fragment"-flag set through anyway. + +* Mixing OFB or CFB cipher modes with static key mode is not recommended, + and is flagged as an error on OpenVPN versions 1.2.1 and greater. + If you use the --cipher option to explicitly select an OFB or CFB + cipher AND you are using static key mode, it is possible that there + could be an IV collision if the OpenVPN daemons on both sides + of the connection are started at exactly the same time, since + OpenVPN uses a timestamp combined with a sequence number as the cipher + IV for OFB and CFB modes. This is not an issue if you are + using CBC cipher mode (the default), or if you are using OFB or CFB + cipher mode with SSL/TLS authentication. |