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Local traffic through VPN, global traffic through WAN

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linux-howto

http://serverfault.com – I have an issue with my internet connection. I am using VPN (Aventail Client) to access the local resources. When connected to VPN the Internet traffic passes through it, not through my LAN or Wi-Fi network. I would like to change the routing table to use the Wi-Fi adapter of the PC for WAN traffic. I have routing file, which works very well and routes the traffic in this way, but only when I am physically connected to the local network through LAN. But I can't set it to work with the VPN connection, because I have no gateway when I am connected to it. Etc this in bold is missing. What to do? (HowTos)

dayu's picture
Submitted by dayu on 10/26/2012 – Made popular on 10/26/2012

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I have a home LAN behind a Linux firewall connected to the Internet. The firewall also has a VPN connection to a remote host that can route traffic from the VPN to its Internet connection with NAT.

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I have to use a VPN for work 'citrix anyconnect vpn' which unfortunately also routes lan through the VPN. This is a feature of the VPN.

Is there a good / easy way or guide to do something like setting a VM with the VPN software installed and running on it, and then routing all the host internet traffic through the VM but keeping the host's lan traffic on the local lan (not VPN).

I am sharing my DSL internet connection using a modem+wireless router (single device) to 5 systems. I want all my internet traffic to go through one of the linux boxes in my network.

The problem here is that wireless devices connect directly to the modem+wireless router.

Is such routing of traffic possible??

PS: I am not sure if i could convey my situation clearly...

I was trying to capture localhost traffic with Ethereal, which doesn't work without re-routing localhost traffic to your router gateway. I didn't get the route command quite right, and messed up my routing table. I typed route -f to clear the routing table and rebooted, but when I finished rebooting, the routing table wasn't restored to its original state.

ip routing policy in linux 35 weeks 2 days ago

I have a linux system with two network interfaces (eth0 in x.x.x.0 and eth1 in x.x.y.0). Is there any posibility to add some route policy to send all the traffic to network x.x.y.0. I would like even the traffic from eth0 to be send to eth1's network.

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I often work remotely. I use the Network Manager to set up my VPN connection, which has worked pretty well. The VPN I have set up currently using the Password with Certificates (TLS) type.

i have two ethernet interfaces namely eth0 and eth1. Now i want to implement an advance routing rule but i am totally new to firewall/routing rules in linux/CentOS.

Here is what i am trying to do:

So both my interfaces are up and connected to internet.

I have an Ubuntu machine acting as a router/Stateful Firewall/NAT for my internet connection. It has a couple of ethernet ports and a wireless network for my home network (eth5, eth7, eth10 and wlan1). It is connected with a DSL modem in bridged mode giving it a connection to the internet called ppp0.

I have an Ubuntu Box on my LAN that I would like to:

Send all external traffic over an OpenVPN connection (tun0) Deny all external traffic if the OpenVPN connection should fail Allow all internal traffic to my 192.168.0.0 network

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