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Questions tagged [bridge]

Bridge is the term used in computing to describe a device that connects two or more networks that use different protocols or equal to two segments of the same network using the same protocol, for example, ethernet or token ring.

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ARP request is successful, but TCP SYN is not visible in output of Wireshark

I was redirected from Network Engineering, hopefully below is in scope of on-topics. I have a TCP server, its properties are the following: It runs within a virtual machine (VMware). The host OS is ...
user94749's user avatar
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Present a laptop as a keyboard via usb-c to a raspberry pi

I have a laptop (dual boot linux/windows, if this could help, and with both usb-a and -c ports). I also have a raspberry pi 5 (I just received this starter pack for my 42th birthday). I don't have a ...
Vito De Tullio's user avatar
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OpenVPN bridged setup: Unable to reach hosts

Disclaimer This was originally posted on the Game of Active Directory repository: https://github.com/Orange-Cyberdefense/GOAD/issues/233 Descriptions I've setup a tap/bridged VPN using this guide to ...
shad0w's user avatar
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Layer 2 WiFi-Eth Bridge Not Forwarding DHCP Requests

I’m running Ubuntu 64-bit Server on a Raspberry Pi 4B. I have a USB-WiFi dongle with WDS/4addr/AP mode enabled that is connected to my gateway. I then have a Layer 2 Bridge setup using iproute2 that ...
cdubs's user avatar
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Is it possible to use the same IPv4 on multiple servers running apps on different ports?

My setup; 5+ dedicated servers connected through a switch /20 public IPv4 subnet on the switch Bridge network setup so any dedicated can use any IP from the /20 for any app I want to be able to run ...
Marry Jane's user avatar
2 votes
1 answer
76 views

How can I set up an access point on Linux and still be connected to the internet?

I need to use a laptop with Ubuntu 22.04 LTS as an access point, to connect an Ethernet-only device to the Internet, and to be able to ssh into it from the network. The laptop does not have WiFi ...
Alessandro Bertulli's user avatar
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1 answer
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The relationship between Tun/Tap and Tcp/Ip stack when Tun/Tap connect to a bridge

I know theres program such like OpenVPN can use tun to interact with Tcp/Ip stack. And I know we can use Tun/Tap with bridge to do things like vm networking. But I wondering when a Tun/Tap connects to ...
hang QAQ's user avatar
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Why is networking not working on “Ubuntu22.04.img” VM under KVM Ubuntu 22.04?

I am trying about 5 hours now and cannot get it work. I want that my VM can get access to the Internet. Host Ubuntu 22.04 with kvm/virt-manager installed followed different how to's (mostly the same, ...
Maddy's user avatar
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Proxmox linux bridge has binded ip which not works 50% of time

I have default proxmox install on Vultr baremetal server It has bridge like this root@ed2:~# cat /etc/network/interfaces auto lo iface lo inet loopback iface enp1s0 inet manual auto vmbr0 iface ...
arheops's user avatar
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I got Ethernet bridging to work but I am puzzled by the Icon that is presented in the windows 10 networking status area

I was having a lot of trouble getting the Ethernet bridging to work on my home network. The network is in my shop area downstairs and connects with my router upstairs by Wi-Fi. The bandwidth on the ...
preali's user avatar
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How can I get a VLAN interface in a Linux bridge?

I'm experimenting with Linux bridges and vlan filtering but I'm having a few problems. What I have is a VM with a trunk (tagged frames) that arrives on ens19. What I want to do is connect this port to ...
GaMMachiPo's user avatar
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163 views

How to setup an Ethernet bridge under macOS Sonoma 14.2.1?

When configuring an Ethernet Bridge under macOS Sonoma, it seems that the bridge will not be set up entirely. From another post I learned that new devices should be configured via the GUI what I did. ...
Peter's user avatar
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1 vote
2 answers
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Bridging multiple WiFi networks to Starlink Router

Preface: I'm a software engineer but have limited knowledge of IP networking. I am tasked with taking an existing StarLink installation (round dish / 1st gen router) and making the internet connection ...
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How to access bridged modem/router from behind a TP-Link router

I have set up the ISP modem/router in bridged mode, which is connected to the WAN port of a TP-Link router. I want to access the GUI of my ISP's modem/router. I can't do this anymore. Ping to 192.168....
BertAR's user avatar
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Block DHCP ports between two routers

I have two building networks connected with a wireless bridge. Both on the same subnet, but both have there own router, gateway, internet, etc. My old wireless bridge had a firewall, so I could block ...
jAce's user avatar
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2 votes
1 answer
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Multiple Interfaces on same subnet breaks PTP

I have a PC ("main PC") with two interfaces mgbe0 and mgbe1. Both of these interfaces connect to another PCs A and B (mgbe0->"A", mbge1->"B"). Both PCs A and B are ...
Megapiot's user avatar
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110 views

Bridging a VM to access my LAN

I've been trying to set up a bridge connection for a while now and I can't seem to get it to work the way I want it to. I'm using a dell poweredge t140 with kali installed. I installed VirtManager ...
Anthony Periandri's user avatar
2 votes
1 answer
209 views

Issue with 802.1q VLAN on VMs in bridge mode with Wi-Fi interface

My environment is a router with OpenWRT, a laptop connected to the router via patch cable and an untagged VLAN with VID 5 configured on that port in the router, and a MacBook M1 Pro connected via Wi-...
amkgi's user avatar
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Sudden jumps in internet latency

For the past 2 months I've had some weird hitches on my internet. Every so often (about 5-15 minutes) I get a single short spike of high latency. Below is a capture of the previous 200 ping results. (...
Aleksander Fimreite's user avatar
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same ip range and subnet in 2 different bridges

I am trying to create 2 different virtual networks in the same ip range (not using NAT) in virt manager.Doesn't work with the gui or editing the xml of the new virtual network . Is the best way to ...
ISG's user avatar
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1 answer
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ip link bridge error on Ubuntu in Parallels Apple Silicon

When trying to add bridge link I'm getting following error: sudo ip link add br0 type bridge RTNETLINK answers: No such device It is Ubuntu 20.04.6 LTS running on M1 Pro Mac in Parallels Win 11 Pro ...
awattar's user avatar
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1 vote
1 answer
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QEMU VM guest with no network in bridge mode on Arch Linux

I try to create a network bridge mode with my QEMU VM guest in Arch Linux using systemd-networkd. First, I create bridge mode in Arch Linux: # nano /etc/systemd/network/br0.netdev [NetDev] Name=br0 ...
membrillo's user avatar
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Network bridging on windows

I have a network on only one Ethernet NIC and is connected on the internet. I have second IP on the same network card, and i need to bring the second network on the internet. If i make a virtual ...
konstantinos Dms's user avatar
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1 answer
72 views

host unable to connect to network or internet, when eth0 is under bridge

I am actually trying to use this docker-net-dhcp open source network driver for docker, to enable containers get ip addresses from DHCP of the host-network. The steps are, ip link add my-bridge type ...
VB11's user avatar
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161 views

Why does mDNS and UPnP (DLNA) behave like this on my iPhone 8-created Access Point?

I'm trying to understand the behavior of the network of my iPhone 8's internet sharing access point (created when enabling its internet sharing). In practice the iPhone 8 acts as an AP, default ...
Andreas's user avatar
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2 votes
2 answers
3k views

Can I connect 2 Ethernet cables from the same router to a bridge mode router?

I have an ISP provided router at the perimeter and I have 1 cable connected from it towards my consumer router with bridge mode activated. My bandwidth speed is 300mbps and upload 200mbps, and my ...
Saud Aljaffer's user avatar
0 votes
1 answer
429 views

How to get the ip address of veth in a bridge?

In my environment, there're three veth in the bridge: $ brctl show virbr1 bridge name bridge id STP enabled interfaces virbr1 8000.52540071337a yes ...
Klaus Ma's user avatar
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453 views

How to access an isolated Network from a NAT network in QEMU

I have a couple of VMs running on QEMU, some need to access the internet while others should be isolated. I already have two virtual networks, one of type NAT and the other is isolated. I want to ...
td211's user avatar
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1 answer
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OpenVPN Ethernet Bridging doesn't work, no access from client to internal

My Environment: Host PC is on Windows 11, with VM Ware. There is a virtual machine (Ubuntu 22.04.3 LTS) in VM Ware, with bridged virtual network card. Everything with network and Internet works fine ...
Arthur's user avatar
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0 answers
39 views

Bridged NIC is unreachable via my host PC

I have an ethernet connection between my AOSP device and host PC, once I set ipv4 for both on the same subnet i can connect between them but once I create a bridge on my AOSP device and make its NIC ...
Itachi's user avatar
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385 views

Bridging Ethernet and Wifi for DDS/ROS2

I have a setup like the one illustrated below. The router is a standard commercial home router and wireless AP, and computer B is a Raspberry Pi running Ubuntu, and it has one ethernet interface and ...
eirik-ff's user avatar
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Setting up a firewall to be in front of my devices using public IP

I'm currently using USG FLEX 500 firewall device from Zyxel. It has 6 unused ports. I have 7 PCs each with public IP address assigned to it. I would like to set the firewall up in a way that when ...
Lewis's user avatar
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0 answers
181 views

Cannot ping server behind wifi extender

I have a server connected to a wifi extender (too long/impractical to run Ethernet). Topology: Modem/Router <--wireless--> wifi extender <--ethCable--> server The extender advertises an ...
A.D's user avatar
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1 vote
0 answers
630 views

ufw blocks KVM guest from getting ip address and accessing network

I need help getting ufw on a host computer to allow traffic to a virtual machine that it hosts. More specifically, I am running Ubuntu 23.04 Server with a KVM virtual machine on a bridged network. My ...
Cold-Lemonade's user avatar
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0 answers
665 views

Dramatic difference in network performance between multiple KVM virtual machines, accessing a bridged physical interface

I have noticed a very peculiar difference in network speeds for the 3 VMs I have created. For one VM the network works without any issues. For the next the packet loss is between 50 and 100%, usually ...
rbaleksandar's user avatar
2 votes
0 answers
1k views

Bridging VLAN sub-interfaces

How could I bridge together VLAN sub-interfaces? On my host, I can successfully enslave my eth0 interface into a bridge. I can also successully create and use VLAN sub-interfaces. However, I have ...
Daladim's user avatar
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0 votes
1 answer
299 views

Linux Bridge MAC Address flip flopping

Does anybody know why our server is flip flopping between the mac address of the main network interface (eno0) and a bridge interface (br0) on the same machine. I don't think it's affecting ...
Milonic's user avatar
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0 answers
170 views

How to create a bridge device to be used with virt-manager,that I have installed within ubuntu 22.10,installed on the WSL2 system on Windows 11

I've just installed virt-manager on my Ubuntu 22.10 that I've installed within the WSL2 system running on Windows 11 with the aim to virtualize FreeBSD. I've reaized that virt-manager didn't create ...
Marietto's user avatar
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1 vote
0 answers
173 views

Duplicated network packets with VMware Workstation 17 Pro and Intel Ethernet Controller I225-V bridged network adapter

I'm seeing network packet duplication for traffic between guest and host on several machines that use an ASUS ROG STRIX B650E-E GAMING WIFI motherboard in their builds. This board comes with an Intel(...
predi's user avatar
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0 votes
1 answer
127 views

LXD containers drops ICMP between one another

So I stumbled across an issue that I cannot figure out. I have setup two host machines each with two LXD VM containers. Both are running LXD via Snap. One host is running Ubuntu 22.04 with two Ubuntu ...
dbergloev's user avatar
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0 answers
24 views

Does PCI bus transactions require a routing mechanism?

Does PCI require routing mechanism in those 2 cases? The two devices are on the same PCI bus and aren't seperated by a bridge. They aren't on the same PCI bus. I don't think it requires a routing ...
John greg's user avatar
0 votes
0 answers
613 views

Using iptables-nft/ebtables-nft to intercept specific forwarded/bridged IP packets on a bridge and redirect them to the bridge device itself

With a bridge br0 using eth0 and wlan0 as bridge ports, formerly one could intercept packets arriving on a bridge port with iptables -t mangle -A PREROUTING -m physdev --physdev-in wlan0 --protocol ...
dom's user avatar
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0 votes
0 answers
135 views

Linux: virtual interfaces with multicast

I have a Linux process which communicates with external world using TCP and UDP. Also it does send message over multicast. Now I want to test the communication by mocking external communication. I ...
samy's user avatar
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0 votes
2 answers
3k views

Can I still use the Ethernet ports on an ISP's modem after setting it to bridge mode?

So right now I have two network devices: A Huawei modem/router from my ISP, and an ASUS WiFi router that I bought separately. How I currently have it set up is the ASUS router is running on AP mode, ...
nibsy's user avatar
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2 votes
0 answers
202 views

Connecting VM to outside world through a bridge

Currently setting up a VM (through AWS Firecracker, that shouldn't matter though, it just takes tap0 and uses that for eth0 in the guest) which should connect to the outside world. I've got the host ...
Radvylf Programs's user avatar
1 vote
1 answer
830 views

systemd brings up sshd before networkd, causing no ssh service

On my Ubuntu 23.04 system, systemd will attempt to bring up sshd before the network's bridge is brought up by systemd-networkd First it reports: Cannot assign requested address And then: br0: netdev ...
Bram's user avatar
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0 answers
169 views

How to access a computer connected to LAN via another computer?

I have the following network configuration: I wan to able to access the laptop through the entire network, I can't connect it to the switch directly because of physical constraints (there are more ...
Sujal Singh's user avatar
0 votes
1 answer
507 views

Get static public IP from a VPS

I'm attempting to assign static public IP addresses directly to my OPNsense box on a local network. My VPS provides me with four IP addresses: ens4 1.1.1.1 ens4:1 2.2.2.2 ens4:2 3.3.3.3 ens4:3 4.4.4.4 ...
Joaquin Varela's user avatar
-3 votes
1 answer
354 views

If router is in bridge mode, is it still emitting EMF?

I have an Arris Surfboard SBG7400, and I put it in Bridge mode so as to avoid EMF radiation from keeping the router on (I live in a tiny place and it's in my bedroom). But my Wifi is still picking up ...
Marisa's user avatar
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3 votes
1 answer
5k views

VMware bridged mode is not working, but NAT mode works fine

I recently updated my PC and found out that the bridged mode of VMware Workstation Player 17 stopped working, however NAT mode works fine. Host OS is Windows 11 and guest OS is Ubuntu 18.04. I've ...
Yiyang Yan's user avatar

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