One reason you would bridge Ethernet connections is to monitor traffic flowing across an Ethernet cable. When you bridge two Ethernet networks, the two networks become one single (larger) Ethernet network. It is possible to 'bridge' two Ethernet adapters together (for example, eth0 and eth1). Please visit these sites if you need a more in-depth discussion of network bridges and the commands used here.

This article contains information from several sources, including It is assumed that the bridging computer is not directly connected to the Internet. This covers how to bridge connections using the package bridge-utils. Network Monitoring Bridge - An in-line sniffer page.

Installing bridge utilities - A similar page from a Bridge-Utils point of view. KVM Networking - Network configuration for the KVM virtual machines server. NOTE: Bridging is popular, and so it has reference material in several places that may not all be updated at once. These instructions work for current Ubuntu versions as of this writing.

Automatically Create the Bridge at Start-upīridging Ethernet Connections (as of Ubuntu 16.04).

Bridging Ethernet Connections (Step by step).

Bridging Ethernet Connections from the GUI.

Bridging Ethernet Connections (as of Ubuntu 16.04).

USB reverse tethering configuration process (A is the phone side, B the laptop side) A> android-gadget-service enable rndisī> echo 1 | sudo tee /proc/sys/net/ipv4/ip_forward Phone configuration: Nexus 4 with mako OTA 5 rev 22 It acts as if System parameters/updates forces the connexion to be OTA (data connexion is either wifi or 2G/3G/4G), which is a bug in my opinion: if I want to update my phone, or just access the app store, through the USB connection, I should be able to do it! I finally do not have a clue of what is happening, and where to submit a bug report. A wireshark analysis for web navigation, for example, is normal. Wireshark on the usb interface shows that there is no network traffic at all on the usb cable, which is surprising. It works well for most applications, like web browser, GPS navigators, webapp, but it does not work when I click on the ubuntu store (which shows an empty page), and for System parameters/updates (which seems to try to connect to something without success). I configured reverse USB tethering between my laptop (with ubuntu 15.04) and my Nexus 4 (with ubuntu touch OTA 5 rev 22).

Wireshark ubuntu 15.04