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authorParménides GV <parmegv@sdf.org>2015-06-04 19:20:15 +0200
committerParménides GV <parmegv@sdf.org>2015-06-04 19:20:15 +0200
commit27594eeae6f40a402bc3110f06d57975168e74e3 (patch)
treecdabf6571e6f4ff07205fd6921d8095539a1fcdc /app/openvpn/contrib/openvpn-fwmarkroute-1.00/README
parent8dc4f58d96892fbfd83094fb85b1d17656035290 (diff)
ics-openvpn as a submodule! beautiful
ics-openvpn is now officially on GitHub, and they track openssl and openvpn as submodules, so it's easier to update everything. Just a git submodule update --recursive. I've also set up soft links to native modules from ics-openvpn in app, so that we don't copy files in Gradle (which was causing problems with the submodules .git* files, not being copied). That makes the repo cleaner.
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-OpenVPN fwmark Routing
-Sean Reifschneider, <jafo@tummy.com>
-Thursday November 27, 2003
-==========================
-
-These scripts can be used with OpenVPN up and down scripts to set up
-routing on a Linux system such that the VPN traffic is sent via normal
-network connectivity, but other traffic to that network runs over the VPN.
-The idea is to allow encryption of data to the network the remote host is
-on, without interfering with the VPN traffic. You can't simply add a route
-to the remote network, becaues that will cause the VPN traffic to also try
-to run over the VPN, and breaks the VPN.
-
-These scripts use the Linux "fwmark" iptables rules to specify routing
-based not only on IP address, but also by port and protocol. This allows
-you to effectively say "if the packet is to this IP address on this port
-using this protocol, then use the normal default gateway, otherwise use the
-VPN gateway.
-
-This is set up on the client VPN system, not the VPN server. These scripts
-also set up all ICMP echo-responses to run across the VPN. You can
-comment the lines in the scripts to disable this, but I find this useful
-at coffee shops which have networks that block ICMP.
-
-To configure this, you need to set up these scripts as your up and down
-scripts in the config file. You will need to set these values in the
-config file:
-
- up /etc/openvpn/fwmarkroute.up
- down /etc/openvpn/fwmarkroute.down
- up-restart
- up-delay
-
- setenv remote_netmask_bits 24
-
-Note: For this to work, you can't set the "user" or "group" config options,
-because then the scripts will not run as root.
-
-The last setting allows you to control the size of the network the remote
-system is on. The remote end has to be set up to route, probably with
-masquerading or NAT. The network this netmask relates to is calculated
-using the value of "remote" in the conf file.
-
-Sean