Questions tagged [bridge]

A network bridge is a network device which transparently forwards packets between two or more network segments so that they appear as one local area network (LAN).

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Can I bridge (same subnet) my wifi (hotspot, not client) to wired LAN using NetworkManager?

Setup: I have an Ubuntu box with 2 wired ports (WAN and LAN) and WiFi. My goal is simple: I just want the box to behave as a firewall/router (with NAT) from the WAN to the LAN+WiFi, where the latter ...
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Influencing STP port state

Is there a way to exclude a specific port from being shut down by STP in the case of a loop bring detected? I basically want to be able to say to STP "resolve loops by shutting down a port... ...
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Why Linux has “bridge” link type, and not a “switch”

In Linux, we can have a virtual bridge device. It is used i.e. by Docker, which creates a default "docker0" bridge. Since in networking bridge is a similar device to a switch (and switch is ...
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docker interface tears down wifi internet

I see this problem on my laptop: when I docker run a Docker container, then after a few seconds my WiFi internet stops working. I don't have an Ethernet connection to test that side of things. I don't ...
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Internet access for DHCP clients on separate subnet adapter

I have a VM (Debian) with two ethernet ports. The eth0 NIC connects to the broader world and has full Internet access. 192.168.0.3 Static: 10.0.0.1 +-------+ +------------------------+ |...
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Vmware Bridge - Guest Wifi to Host

Is it possible to create a bridge between the guest WLAN and the host? I would actually like to reach the host via WLAN as cabling is unfortunately not possible.
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How to filter (rate-limit) traffic through a bridge, using nftables, depending on whether or not the traffic originated locally?

I'd appreciate some help with understanding how traffic filtering in a bridge works, especially for packets / Ethernet frames which originated locally. To explain the problem, I'll shortly describe ...
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Forward Public Hotspot connection via RPi and FRITZ!Box Wifi

Id like to access the internet of a couple headless devices through my previous wireless home network, provide by a AVM FRITZ!Box (NET_Home). This AP is supposed to connect via ethernet to my RPi 3 (...
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Transition from iptables to nftables in bridged setup

Given the move by many Linux distros from iptables to nftables as default, I am looking to migrate my iptables rules. I have a Ubuntu server that has two bridges (mainly to accommodate VMs and LXD ...
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Making a switch out of a computer with many Ethernet ports, while staying connected

Given an Ubuntu machine A with N > 2 Ethernet ports, I want to use one of the ports to connect to my router R that has a DHCP server on it and connect machine A to the internet through it. I also ...
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linux bridge interrupts udp packet flow

I am having a UDP issue with the following bridging setup (Linux 5.11.6): (let ns${i} denote namespaces and left${i}/right${i} be veth pairs) ns1{right1(x.x.x.1)---}---ns2{---left1::bridge(x.x.x.2)::...
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Linux bridge won't forward IP packets from a vintage BSD machine — but packets from other Linuxes are fine

Overview I'm using a Linux single-board computer as an Ethernet bridge between an AWS host and a very old and very rare Unix computer. This setup, which was working until a recent sudo apt upgrade on ...
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ssh incorrect password issue bridge

we have setup multiple vm's on the bridge in ubuntu.This bridge assign ip's manually and ip belongs to the host network.We have setup password authentication for host authentication. I can ssh into ...
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Setting up a virtual server group with a bridged interface

I posted a specific problem with DHCP over virtual network components here, but it is quite specific and does not cover the larger problem I would like to address. I have a physical server and want to ...
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How to create network bridge with VLAN and share between host, docker, and qemu?

I have a network interface enp6s0 and I define a VLAN 10 interface in /etc/network/interfaces: # Port #1 of Mellanox ConnectX-3 auto enp6s0 iface enp6s0 inet manual # Create VLAN 10 interface auto ...
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Cannot find bridge device with ifupdown

Please note that I am using Void Linux. Here is my /etc/network/interfaces.d/br0 file: auto br0 iface br0 inet dhcp bridge_ports eth0 bridge_stp off bridge_waitport 0 bridge_fd ...
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KVM and brigde nic in Manjaro is not getting IP from OpenWRT router and DHCP server

I have just followed the steps in the answer of the following: Does Virt-Manager GUI have a easy way to configure networking passthrough/bridge? and everything seems to work. But the virtual machine ...
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How to set up a bridge interface, add eth0 to it, and have internet connection

I am trying to set up br0 with eth0 and veth1 on a headless server where I am logged in via ssh. I am doing this as a preparation to run a systemd service in a special namespace. This namespace will ...
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Cannot access minikube cluster from docker container

I have a Minikube cluster with VirtualBox driver and a Docker bridge network with a few containers. I want one of those containers to be able to access the Minikube cluster. In order to do this in ...
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KVM guests not able to ping each other

Ahoy friends. Currently i am running my Fedora 30 host, using Cockpit and cockpit-virtual-machines in order to manage my machines. I got my network interface enp35s0, and a vlan subinterface enp35s0....
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Docker automatically opens bridge conneciton Debian 10

Debian 10 buster Server has Ethernet and wifi - separate networks enp0s25 192.168.4.0/24 wlp3s0 192.168.1.0/24 Installed python and docker/composer then ran apt-get update now there is br-2501b3fd0 ...
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Setting up an isolated bridge with NetworkManager

The goal I have a Linux SBC (single board card) that has dual ethernet + wifi. I want to create a bridge using the two ethernet interfaces as slave interfaces. The aim is to use the device to sniff ...
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Raspberry pi 4 + share wifi to ethernet + pi hole

I want to setup my raspberry pi 4 like this: Raspberry connect to wifi and share network to second router throught ethernet Run pi hole I searched the internet to find out if it was possible to do ...
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Nftables default drop chain problem

I'd like to take a default drop approach to my firewall rules. I've created some rules for testing purposes: table bridge vmbrfilter { chain forward { type filter hook forward priority -...
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Debian network bridge stops working randomly

I have a host with qemu and bridge (PC -> eth0 -> br0 -> VM): brctl addbr br0; ip link set link up br0; ip link set dev br0 up brctl addif br0 eth0; ip link set dev br0 up; ip link set link ...
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buildroot: adding bridge via interfaces

i got my own interfaces file added to buildroot filesystem (overlay rootfs) auto lan1 iface lan1 inet manual auto lan2 iface lan2 inet manual auto br0 iface br0 inet static address 192.168.40.1 ...
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Configure network to allow QEMU to reach internet

I have the following standard configuration: A remote server connected to internet and that I can only control using SSH On this server, a QEMU instance I'm trying to find the right configuration so ...
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Linux bridge does not forward packets to TAP interface

I have the following scenario where I run a Docker container which has configured inside of it a Linux bridge br0 and attached to it I have the main interface eth0 of the container and a TAP interface ...
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How /sys/class/net/br0/brforward is working?

I have a bridge with AP WiFi interfaces in it. There are several clients connected to that AP. I add another interface into the bridge. New port goes through all states to "forwarding". At ...
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cant connect tap interface with eth

I wrote a simple c program which can send and receive ether net frames using /dev/net/tun and I connected the tap interface with my ethernet nic using both the virtual bridge and veth pair. I expected ...
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How can I access a local network namespace from an external node?

I am trying to set up a runc container running mongoDB Enterprise Edition v4.4 on an EC2 Ubuntu x86 20.04 node, kernel v5.10. I am using the following to set up a network namespace for the container: ...
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Bridging Traffic Between Two Network Interfaces

I have the following setup +---+ +-------------------+ +--------+ +---+ | A |---eth---| eno1 | B | enp5s0 |---eth---| Router |---eth---| C | +---+ +-------------------+ ...
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Filter non-IP traffic on STA wlan0 interface

I want to filter inbound and outbound non-IP traffic going through the wlan0 interface of a Raspberry Pi 3B+ (connected via Wi-Fi to an AP). iptables / ip6tables only seem to affect IP traffic, so ...
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Debian Buster, Xen and Docker - Network bridge issue?

I have a small home server running Debian. On this server I have a few VMs running and I recently installed Docker. I was actually planning to remove some of the VMs and use containers instead. The ...
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256 views

Setting TCP MSS on a bridge port

I have a VXLAN tunnel between two Linux hosts. This tunnel is carried over an Ethernet link with an MTU of 1500 bytes. At each end, the VXLAN interface is slaved to a bridge, along with another ...
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Transparently bridge network over serial link

I have two Linux devices - for simplicity let's call them Raspberry Pi's - in a box that I want to connect to a network with a singe Ethernet link. Both of them need to be accessible, individually, on ...
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Performing MITM on Bridge Interface

I would like to run mitmproxy on 'host1', a Debian 10 Linux PC in order to view a decrypted TLS session. Host1 has the following network interfaces: eth0 - this is connected to 'target', the machine ...
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MySQL ERROR 2007 (HY000): Protocol mismatch; server version = 11, client version = 10

It's not clear whether this has more to do with port collision or something related to "X protocol" and perhaps disabling "X protocol" or changing its welcome message. Might this ...
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Why the physical interface attached to bridge, it can not access by Internet in my case?

I have a network topology like this: you see, the em1(1.1.8.209) is physical interface which I can communicate through Internet. and I created two vm instance: PID 8740 and PID 8817, both use the ...
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How to check whether a bridge connected to physical interface?

In my CentOS 7.7 server, I use brctl show: there get 3 bridges: [dele@att ~]$ brctl show bridge name bridge id STP enabled interfaces br-eb92c719d431 8000.0242d1ce907c no bridge0 ...
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Is it possible to connect an ipvlan to a KVM guest vm? As opposed to a macvlan

I have a nested guest in a shared infrastructure environment with Mac port security. I would like to use a unique public Ip on this vm, however all outbound and inbound traffic must use the single Mac ...
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Proxy ARP/SNAT MAC address with ebtables to openvswitch bridge

I have a public infrastructure hosted VM with nested virtualization working and have created a single vyos guest assigned to a public IP address I have assigned. The provider has port security enabled ...
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87 views

Bridge eth0 to WiFi hotspot as a client

So, I have a raspberry pi4 that I am using as a WiFi signal booster. I have a long range external USB WiFi dongle (wlan0) that is picking up the signal. I am using the pi’s internal WiFi (wlan1) to ...
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Bridge forwards data in Layer3(iP) rather than Layer2(ethernet)

I have some scripts working with bridge & ip netns. It used to forward packets on layer2, but after upgrading my kernel, it seems the kernel forwarding the packets on layer3. In a newer kernel, It ...
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Setting up a Debian Firewall (with UFW) on a bridge connection (wi-fi) — Broken pipe ERROR

Good morning, I'm currently working on the creation of a web server. Here is my setup : MacbookPro running -> VirtualBox VirtualBox running -> Debian 10.04 (only command line) Docker with -> ...
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135 views

Bridge traffic not reaching some ports

I have a tunnel between two hosts that is carried over L2TPv3. Each end of the tunnel is slaved to a bridge, as are other interfaces. The remote bridge has a DHCP server attached to it while the ...
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GitLab Coexisting with SSHD on Bridge Interface

Background I am attempting to convert a server from using Docker to Podman. So far I have been able to convert all of my services (~15 in total) to systemd jobs and run them without issue. In doing ...
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bridge mode on ubuntu 18.04 kills network connectivity

I have a server running Ubuntu 18.04 with 3 wan IPV4 IPs assigned to it. The server is running as a KVM host, I'm trying to apply the IPs to my client vms in bridged mode. So far I can apply the ...
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Does libvirt support vlan aware bridges?

I am using libvirt/kvm in Debian 10 with a vlan aware bridge device, and I am stuck trying to configure the network interfaces for my VMs. Does libvirt support vlans? When I do a search the only ...
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How do I set up a bridge network with KVM where the virtual guest is acting as DHCP server?

I want to run a virtualized pfSense server on a KVM host (Debian 10) along with some other virtualized servers. I have a NIC expansion card that I want to passthrough to pfSense. The host machine will ...

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