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Bonding of IP tunnels

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Special Forums IP Networking Bonding of IP tunnels
# 1  
Old 07-04-2012
Bonding of IP tunnels
Hello.
Our Company is spreaded over Germany.
There are main offices an branch offices.
These offices are mostly connecte via multiple sdsl.
We build a IPSEC VPN Infrastructure using Aastaro Security Gateways appliances.
It seemed that only one VPN Connetion between to offices could be established.
There is no chance of bundeling multiple Connections to improve the availabilty and speed.
MLPPP is not supported.
I evaluated a solution to establish more than one VPN tunnel between two offices.
Now i directed two ip tunnels through the VPN Tunnels (IPROUTE2).
These IP tunnels are bonded with ifenslave.

If i connect the internal Routers direct to each other all works fine.
A disconnected Link doesn't trouble.
If i connect the internal Routers via the VPN Tunnel it works fine as long as both links are established. If one Link is lost only every fourth data packet will be transmitted.

Has anyone an idea why this happens?
Is there a better Way to implement multiple Tunnels?

Thanks
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LEARN ABOUT DEBIAN

l2tpipsecvpn

L2tpIPsecVpn(1) 					      General Commands Manual						   L2tpIPsecVpn(1)

NAME

       L2tpIPsecVpn - L2tp over IPsec VPN Manager applet for the GNOME Desktop

SYNOPSIS

       L2tpIPsecVpn [options]

DESCRIPTION

       This  GUI is not a network manager plugin. However, it provides a systray icon in the indicator applet from which a non privileged user can
       establish and bring down L2TP over IPsec VPN connections.

       From there the user can add, remove and edit vpn connections.

       Editing allows configuring various options for IPsec, L2TP and PPP.

       Among others, the user can configure eg. the gateway, the use of either PSK or a certificate for authentication, various  L2TP  options	as
       redial-	timeout and attempts and of course all important PPP options. It also allows you to configure PPP for tunnel splitting because you
       can add routes as you want.

       When applying your settings, all necessary configuration files are written accordingly (ipsec.conf, xl2tp.conf, options.xl2tpd, opensc.conf
       up and down scripts ...).

       It relies on Openswan and xl2tp packages as the underlying protocol handlers.

       You  can  also  use  certificates  on your local machine or, if e.g. OpenSC is installed and configured, even on a smart card to handle PPP
       authentication.

       The GUI automatically detects when network interfaces are going up or down and can (if so configured) automatically establish or close  VPN
       connections.

OPTIONS

       startConnectionEditor
	      Starts the connection editor dialog.

       applySettings
	      Write  configuration  files  according  to  the connection settings, must be started with root privileges, ie use gksudo as non root
	      user.

       deleteAllConfFiles
	      Delete all configuration files, must be started with root privileges, ie use gksudo as non root user.

AUTHORS

       Werner Jaeger

version 1.0.9							    11 Oct 2012 						   L2tpIPsecVpn(1)