IP forwarding also known as Internet routing enables one workstation to sit on two LANs and to act as a gateway forwarding IP packets from one LAN to another.

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Forwarding VPN clients to internet

I have following configuration. OpenVPN server on a cloud(Ubuntu 14.04) with static IP( example 50.60.70.80 on eth0). Linux and Windows clients are successfully connected to VPN (VPN static IP's - ...
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IPtables Config to Passthrough Internet 16.04

I am struggling to finish the config on my Ubuntu 16.04 fileserver to pass on the internet connection to my HTPC. See the network layout below: [Internet] <--> [DHCP Router] <--> (eno1).[...
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Forward port to local ip + port

On my Ubuntu 14.04 I have a service running on a local IP (192.168.33.99) and port 80. In my network, my Ubuntu computer has IP 192.168.2.3. Now I want to redirect all traffic on 192.168.2.3:8080 to ...
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Is it possible to define a fallback gateway server?

I'm using iptables to implement forwarding on one server, that is support to forward traffic from an internal network to the internet (tutorial: http://www.revsys.com/writings/quicktips/nat.html) On ...
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Problem routing between wireless and wired nic

I have a complicated network setup and I'm searching for advice on a partial problem. My Ubuntu server has a wireless NIC (wlan0) and a wired NIC (eth0). I want to connect a wired subnet to eth0 and ...
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ip forwarding between two LANs

I have 1 server which has 3 NIcs: Connected to the Internet Connected to LAN1 (10.0.0.0/24) Connected to LAN2 (192.168.0.0/28) LAN2 has a server that works on a port, say 4444. How can I forward ...
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Forwarding specific traffic to another LAN

There's a LAN of about 40 computers all running Ubuntu 15.04. There are two servers, both Ubuntu 15.04. One of the servers will act as a SVN repo server and other as a firewall-and-transparent-proxy ...
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How to forward internet connection at eth2 to LAN at eth1?

I have two network cards/connections: eth2 is connected to the internet eth1 is connected to my LAN I want to allow the computers in the LAN on eth1 to access my internet connection on eth2. ...
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Share Internet from laptop (connected to LAN) to Android using WIFI router

The idea is: Internet - eth0 - Laptop - wlan0 - router - Android Static IPs everywhere. IP ranges are different. Could not establish bridge. bridge-utils unable to add wlan0 to bridge. Android doesn'...
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Virtualbox Server/Client topology

I have Ubuntu 14.04 desktop machine that VirtualBox installed on it. I make two virtual machines, one Ubuntu server, the other is Lubuntu client. The default setting allow me to get Internet from ...
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Shorewall IP Forwarding Problems in 12.04 LTS

Internet connectivity through my 12.04 LTS shorewall box is spotty at best. Ping works both locally and to the internet with no dropped packets (from both the box itself and internal LAN). HTTP ...
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Internet connection sharing without Network Manager

I followed these instructions for setting up a shared internet connection with iptables. Specifically, I: Added a network interface for my second NIC in /etc/network/interfaces like so: auto eth1 ...
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How can I set my linux box as a router to forward ip packets?

I am doing a network experiment about ip packet forwarding, but I don't know why it does work. I have a linux machine with two network interfaces, eth0 and eth1 both with static IP address (eth0: 192....
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Linux bridge (brctl) doesn't forward IP-packets when router is one of the bridge endpoints

I have set up a brctl bridge on Ubuntu with the following deployment: Cisco router - > Linux bridge - > client computer The bridge forwards the following packets types: ARP,STP, but doesn't forward ...
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How to forward an Internet connection to another network?

Can somebody please make a short & sweet tutorial telling how to forward an Internet connection to different network interfaces in Ubuntu...? This is the idea: I'm using a 3G usb modem to get ...
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How to configure UFW to allow IP Forwarding?

I have UFW, OpenVPN and Virtualbox installed on my home server. I have a host-only network for my virtual machine guests (vboxnet0) set up with the IP range 10.0.1.0, and another IP range of 10.0.0.0 ...