Questions tagged [network-bridge]

Questions about configuring and using bridging interfaces

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Share wireless connection with fixed ip, on different networks

This question How to share a wireless connection through ethernet with fixed ip addresses? mentions how to share a wireless connection through ethernet with a fixed ip address. This is useful when ...
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No IP for host ethernet when network bridging with netplan

I used netplan on Ubuntu 20.04 Desktop and used a yaml file like the one on this website: https://webby.land/2018/04/27/bridging-under-ubuntu-18-04/ However, my host doesn't have a ip now? How can I ...
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How to permantly disable snooping on bridge interface?

On Ubuntu 18.04, IPv6 networking might fail on bridge interface. Disabling snooping immediately solves the issue. Following Where to put configuration to turn off multicast snooping on bridges? and ...
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400 views

Ubuntu 20.04 Netplan Bridge interface fails at boot

2 new Ubuntu Server 20.04 installs (1 on Hyper-V 1 on bare metal) fail to correctly start bridge interface at boot time. running netplan apply manually will successfully start the bridge (this is ...
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How do I save a virtual interface?

Say I create a virtual bridge interface and configure it as follows: ip link add type bridge name br1 ip link addr add 10.10.10.1/24 dev br1 How do I make it so that this configuration persists ...
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ubuntu20 LTS GA : br0 keeps entering block state/then forward state

I updated from 18.04 LTS to 20.04 LTS (nice ...) BUT I have a bridged network br0 with two KVM behind it. When I ssh to the IP address associatred with br0 it works then 15 minutes or so later the ...
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97 views

How to configure a bridge interfaces with DHCP in 16.04 LTS?

I have a computer with 3 network interfaces: eth_adsl : Ethernet interface linked with my ADSL box eth_local : Ethernet interface linked with my local network wlan_local : WIFI interface for my local ...
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Connect to both private network and second pc directly

I'm trying to configure a machine (PC1) to be connected to my local network, and also have a direct connection to a second PC (PC2) plugged directly into PC1. I ssh into PC1 and control it headlessly....
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Create bridge network for virt-manager VM to get DHCP IP from router

I am using virt-manager for managing qemu VM but I need to create a new bridge network with my WIFI adapter (wlp2s0) such that my VM can get the IP address directly from my router and not via NAT. My ...
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Open Virtual Switch for bridging Physical network On Ubuntu Server 16.04

I am proof of concept for a client, the requirement are the following: Stretch across 2 site the ERP network (stretched VLAN), this is needed due to dated machinery that have to talk to a particular ...
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Port forwarding Linux->Windows

My situation is the following: I have an old laptop with Wi-Fi and Ethernet onboard, windows PC with no Wi-Fi and my new laptop with both. I want to have remote desktop access from my new laptop to PC ...
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bridge ext_br not displayed in brctl show command

I have installed Ubuntu 18 in a baremetal server. As the interfaces are in ens3, ens4 etc..I mapped them to eth0,eth1 etc by following steps from google creating a file along with mac addresses in it. ...
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275 views

Why does host and bridge get an IP but not the virtual machine?

I'm struggling to connect my KVM virtual machine to the local network. $ brctl show br0 bridge name bridge id STP enabled interfaces br0 8000.4c5262097e59 yes ...
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How can I reset the network configuration of an Ubuntu partition that I can't boot into?

I've been putting a lot of work into getting my new home server set up in the way that I'd like. I went with Ubuntu for a familiar GUI and creature comforts that come along with it, but it's basically ...
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72 views

The loss of the internet connection due to the network bridge configuration

I'm following the tutorial on how to set up KVM on Ubuntu 18.04. There is a line saying : "Before you can dive in and start making virtual machines, you're going to need to set up a network bridge." ...
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How to create bridge to use my wifi into VM?

I want to use my wifi and create a bridge for my VM, so my VM gets its own IP address from my router and I can easily ssh into it. When I create a bridge with nm-connection-editor, I see only the ...
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Bridge link losing DefaultRoute and DNS scope after hot-plugging slave interface - why?

Using 19.10 (eoan). Here's a bird's-eye view of the setup: netplan is set to put wlan0, eth0, eth1 in a bridge, br0 netplan statically sets br0 with DNS servers (and IP4 address, gateway4, etc.) ...
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Host cannot connect to Internet but Guest VMs can

Running 18.04 Ubuntu and I made a bridged interface to allow my VM to share the connection. However much to my surprise, the VM is able to fetch packages from the internet, but my host cannot anymore. ...
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258 views

How to troubleshoot network problems for virtual machines connected via a bridge (Ubuntu 18.04)

On my server (Ubuntu 18.04 LTS) I am running a KVM virtual machine which has been running fine for over a year or so but recently - probably because of some update - the virtual machine would lose ...
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Bridged network does not seem to brodcast, or I cannot ping an IP on a different subnet through the bridge

Scenario - I have an Ubuntu 14 system that I installed GNS3 on. My local subnet on eth0 is 192.168.2.30. virbr0 and virbr1 exists and are assigned 192.168.122.1 and 192.168.100.1 respectively. I am ...
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Docker kills OpenVPN connectivity

An OpenVPN bridge-mode server is running on my Ubuntu 18.04 home server. I use it to access my entire home network from my workplace, and to access my workplace PC (wp-PC) from any of my home machines....
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56 views

Bridging two interfaces together, forward traffic

I'm currently trying to create a setup that forwards traffic through a Ubuntu server to a switch, which then multiple servers will be connected to (each assigned an individual IP(s)) The Ubuntu server ...
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bridging wlan to KVM guests

running 18.04 I am trying to bridge a wireless LAN adapter so I can extend the network to KVM without routing any of the wireless traffic on the host - all using netplan. here is my config: network: ...
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Connecting Ubuntu Server to the Internet through Windows 10 laptop and Ethernet cable

I am running Ubuntu Server 18.04.3 ("Computer A") that is connected to a Windows 10 laptop ("Computer B") by an Ethernet cable. Computer B is connected to the Internet through WiFi. I am trying to ...
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1answer
71 views

Using a system with a Linux-based OS as bridge (for WIFI and ETH) [duplicate]

Context: I have an old working system with an Ubuntu version correctly running on it. The problem to solve: The wifi where I work does not reach every place in the office. The idea is to use this ...
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Netplan apply breaks LXD network

Soon as I run netplan apply, all my LXD containers become unreachable via their IPs. Then, I have to reboot the containers for them to reach the network again... My LXD Profiles uses Linux Bridges, ...
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214 views

Connecting wireless interface to bridge - MAC addressing

I've been playing around with my network settings and tried to use hostapd to create a WiFi hotspot based on the virtual software access point virt1 (10.10.0.1/24). This does work flawlessly using NAT ...
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63 views

Create a WiFi access point that shares the Ethernet connection

I'm using Ubuntu Server 18.04 on a Raspberry Pi 3. The idea of what I'm trying to achieve is represented by the following schema: Raspberry Pi WiFi ┌──...
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passing untagged traffic

how can i pass untagged traffic from auxiliary bridge to virtio interface, Where we are sending mirror traffic from a switch to the aux port Then to the kvm virtual interface Regards, nnakhle
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1k views

How can i configure Tor with bridge and privoxy to proxy entire system

Accessing to some repository and website for sanctioned countries always is a big challenge for developers. I try to find the best and easiest way to proxy entire system in Ubuntu with Tor, privoxy ...
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253 views

Netplan Bridge Stuck in Degraded Mode

I'm trying to add a Bridge on 18.04 Server VM on Hyper-V with LXD Installed and the bridge never comes up and never gets an IP Address. Hopefully someone sees what I'm doing wrong. network: version:...
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Bridging issues within a small network (slaves cannot share master's internet connection)

I have a central machine with Ubuntu 18.04 LTS Server installed that is connected to the internet via a static IP address, and I created a subnetwork with several (6) other computers (also with Ubuntu ...
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Many bridge networks on Ubuntu Startup / Boot

When I start ubuntu 18.04, there are MANY Bridge Networks in my ifconfig. I can't connect some networks, (not cabled nor wifi) until I delete some of them. After delete them, systems works perfectly....
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593 views

Linux bridge as a trunk port

does anyone know if linux bridge supports passing multiple VLANS? I have seen many example like eth0.VLAN_id then add this to the BR0 for example and that works. What i am actually looking for is to ...
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155 views

Where are all the network-bridges coming from, ifconfig shows me?

I'm using Ubuntu 18.04.3 LTS As I'm a developer, I have Docker, docker-compose and Virtualbox and Vagrant installed If I enter in a terminal: $ ifconfig I got a long list of network bridges. ...
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42 views

Bridges without an IP

This answer states that a network bridge doesn't always have to have a IP address. It mentions this entry for /etc/network/interfaces: auto br0 iface br0 inet manual bridge_ports eth0 which ...
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141 views

Attach multiple physical Interfaces to a KVM VM

I am trying to set up multiple VM's on a Server with multiple network interfaces via KVM and network bridges. The idea is to have a Bind/ISC Server with an IP on Bridge#1 that assigns IP's and ...
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1answer
629 views

Bridging LAN and WIFI using netplan not working and killing AP

I'm trying to extend my local LAN network via WiFi and would like all devices in the same network. The setup is as follows: DHCP/DNS server running inside the LAN separate PC linked to the LAN, with ...
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790 views

Define hostapd configuration settings on netplan

I recently discovered that netplan can manage hostapd accesspoints, but this is the extent of the example config: wlp1s0: access-points: "guest": mode: ap # no ...
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115 views

Creating a home server to act as a wifi access point and home router (Ubuntu server 18.04)

I'd like to set up a home server with several responsibilities Wireless AP for local networking Ethernet switch for local networking of various devices (HTPC, networked printer, etc) Home firewall ...
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387 views

Connecting two ethernet ports with a bridge kills local network

I've just finished rebuilding my NAS, now using an Intel-based SBC with two Realtek ethernet ports (Odroid H2 for those interested). Everything worked fine so far, up until I tried to use both ...
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117 views

Ubuntu 16.04 static route with 2 interfaces and a bridge. Use one interface just for local traffic

I have a Ubuntu 16.04 install with 2 connected interfaces both with static IP's one in a bridge configuration. The networking service refuses to set the gateway on boot and I have to add it manually ...
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106 views

Ubuntu 18.04 with routing but need VM bridge

I have set up routing on my Ubuntu 18.04 desktop box. I have one dedicated ethernet port for my internal network that serves DHCP. I have my wireless NIC set up for internet access. Network works ...
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132 views

Cant connect to external App from the docker container

I have a rest api based microsercvice application where I have multiple docker containers within a dev-server. The IP of dev-server is 10.192.168.xxx. I have the an external application to which I ...
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91 views

KVM Bridge Sees VM Mac Address on Wrong Port

I have an Ubuntu MAAS managed KVM. Primary network for the host is an balance-rr bond with a static IP Address. The virtual machine is attempting to use MAAS configured bridge to PXE Boot but it's not ...
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195 views

Ethernet cable not detected after force shutdown in Ubuntu 18.04

My Ubuntu 18.04 shutdown forcefully because of a power outage. Now after restart, I have two new accounts dnetmaster netplan daemon user In my user profile, the internet does not work. After ...
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71 views

Unable to ping or rdp from UBUNTU 18.4.2. HOST to KVM windows7 Guest VM -but able to ping to other linux guest centos

Unable to ping to only Windows guest. able to ping to other guest. HOST os Ubuntu 18.4.2 What i did so far- Tried to change device to virtio,rtl8329,e1000 Internet is working on guest. Windows 7 ...
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58 views

LXC - two bridges

I'm trying to create two different bridges to use with LXC. I have the following configuration: /etc/lxc/default.conf: lxc.net.0.type = veth lxc.net.0.link = lxcbr0 lxc.net.0.flags = up lxc.net.0....
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Bridged network for LXC - Ubuntu 18.04

I'd like to create a bridged network for three containers, with static IP addresses and connected to the internet through the ethernet card of the host machine. For example, with the bridge named ...
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57 views

Routing Traffic on additional IP to VM

I've setup a Windows Server 2012 VM on Ubuntu 18.04 for testing purposes. The VM is running but without internet access. I've also got a second ip from my host, Hetzner.de. The Ubuntu server has ip: ...

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