Bridging is a forwarding technique used in packet-switched computer networks. Unlike routing, bridging makes no assumptions about where in a network a particular address is located.

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how to make sure modem is truly in bridge mode

I need public ip in pfsense wan interface so I configure my adsl modem as bridge mode But I have little doubt on this "it is truly in bridge mode". What are the steps to make sure about bridge mode ...
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Wan ip always 0.0.0.0 after set bridge mode

I try to set my my modem(unnanti A-300M) as Bridge Mode (set eventhing as a default), After getting wan addr is 0.0.0.0. Easy for your reference note: unnanti A-300M = Modem + Router
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dns server ip address is not written into resolv.conf

linux mint 17.3 i have to manually write "nameserver 8.8.8.8" in /etc/resolv.conf on every reboot, it also gets stuck with message "waiting for network" where i press "ESC" button to skip that and ...
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Can ping through wireless bridge but can't route traffic

I'm trying to route packets between a wired-wireless-wired link. I'm using a Spirent test center as a traffic generator which routes traffic to an Access point over a LAN cable(wired link)- This ...
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17 views

Can't bridge traffic between a wireless and wired interface of a windows 7 laptop

I'm trying to route packets between a wired-wireless-wired link. I'm using a Spirent test center as a traffic generator which routes traffic to an Access point over a LAN cable(wired link)- This ...
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1answer
10 views

Bridging host-only subnet on multiple Dom0s

I currently have two XEN-Hosts running a set of virtual machines. These machines can communicate with each other via a host-only network. I want to be able to move virtual machines between both ...
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33 views

libvirt IPv6 Guest can't connect outside of the Host

i am trying to get a address from my IPv6-Subnet working in a Virtual Machine(libvirt, qemu). IPv4 over nat works like a charm. The host is a Debian 8.5 with qemu 1.2.9 and a 4.6.3-1~bpo8+1 (2016-07-...
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Bind OVSBridge to an already bound port

I want to enslave a NIC to OVSBridge which is already enslaved to a Bridge. Is that possible, if yes, how ?
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Openstack instance cannot be sshed or pinged, multi node setup

I am using Openstack Mitaka My company has a network: 10.23.77.0/24 So I created a network: External Network: 10.23.77.0/24 My private network : 192.168.123.0/24 My router is between these two ...
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Iptables not working on a bridged setup [closed]

I am trying to block DNS requests using an Ubuntu machine. I have created a bridge and the packets are being forwarded as expected. Only when I add iptables rules, it is not taken in account. I tried ...
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Docker containers don't have internet access until docker service restarts

I'm creating a bridge manually, with this command: docker network create --driver bridge --internal --subnet=172.20.0.0/24 br0 Then i start containers using that bridge parameter --net=br0 --ip=172....
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libvirt bridge is not forwarding arp replys

I did set up an vm with libvirt but it gets only sometimes network connectivity. I could narrow the problem down to the bridge is not forwarding the arp replys from the vm. From within the VM I can ...
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Linux Bridge (vmbr) has no connection to physical NIC [migrated]

I built myself a new home server and wanted to use Proxmox VE. Its Debian based and I have 3 KVM-machines running. Machine 1: "Sophos UTM" has WAN on vmbr0 and DMZ on vmbr1 (192.168.200.254) Machine 2:...
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21 views

Connecting two OpenVZ internal networks so containers can see each other

I have two OpenVZ Hosts with containers on them. This is the current layout: Host-A: (eth0 (connected to internet), eth1 (connected to Host-B)) Host-B: (eth0 (connected to internet), eth1 (connected ...
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27 views

KVM - Adding public IP over bridge

I am working on setting up a KVM environment and normally I just take it for granted that the networking has been set up. I am running into difficulty getting the public IPs accessible from the VMs. ...
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25 views

FreeBSD bridge ARP replies not forwarded

I have a bridge between two networks using the same address space, and have very strange issues with ARP packets. Interface bridge0 has no IP address assigned, and has two members : em1 and em2. A ...
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8 views

3 server point to point bridge loop

I have a setup with 3 servers (A, B and C) running debian jessie which are all directly connected to the other two servers, so it is a ring-like layout. I'd like them to only have ohne IP each like if ...
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2answers
72 views

Dual interface PC with one IP address

I would like to set up a machine with 2 network interfaces in the following setup: LAN1 <---> PC <---> LAN2 The tricky part is that the PC should be accessible from both LAN1 and LAN2 with the ...
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51 views

linux veth use existing peer interface

I have a sit tunnel interface which I want to transparently connect with one end of a veth pair so that everything that drops out of the tunnel interface flows through the veth interface and vice ...
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22 views

Bridge not functioning as expected

I want to put a listening machine in my test network using a bridge setup. I now have the following test setup: PC1 (192.168.40.250/24) --- Bridge (192.168.40.160/24) --- PC2 (192.168.40.132/24) ...
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43 views

One way network bridge [closed]

I have two networks, with a single machine sitting on both (two NICs) shown below. That machine is Linux. I was hoping to set up a bridge of some sort so that work stations on the 192.168.1.x ...
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53 views

failed to start domain on RHEL 7.1 using KVM

I want to create a domain(guest machine) on my RHEL 7.1 using KVM. The domain is getting defined but when I start it, it shows the following error: virsh # start vm-1 error: Failed to start domain vm-...
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37 views

Transparent Bridging of Internal Network in KVM

I am deploying a following topology of virtual Honeynet in KVM.Topology of Honeynet I have two network interfaces eth0 and eth1 ony my System. Problem I am facing is to implement transparent bridge i....
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52 views

bridged LXC: container's mac address learned on wrong interface

Ubuntu host has p2p1.17 physical interface attached to bri17 bridge. LXC container FOO has following net config: lxc.network.type = veth lxc.network.link = bri17 lxc.network.hwaddr = 00:16:3e:aa:aa:...
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49 views

Kvm virtualization packet loss on guest machine

In Ubuntu 14.04(64-bit) by using KVM virtualization and bridging network I have about 10% packet loss in my guest machine and I have no packet loss on host machine. server1@xxxx:~$ uname -a Linux ir1 ...
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33 views

How to isolate two containers connected to the same bridge?

I have several LXD containers which are bound to a single bridge (the default lxdbr0 or another one, it does not matter). The host itself has another two interfaces, one ultimately connecting it to ...
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1answer
28 views

Bridge networks via Wi-FI

I've bridged networks before using wired bridges but just want to check that this is also possible via Wi-Fi. In the attached diagram on the left there is the pretty common laptop connected via Wi-Fi ...
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202 views

pfsense bridge of vlan interfaces

Hardware Setup AMD E1-2100 Mini-ITX Motherboard with Onboard Gigabit (re0) Intel PCI Express (x4) 4-port Gigabit Adapter (igb[0123]) Software Setup pfSense v2.3 I'm trying to replicate my ...
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45 views

policy routing to guests on other server

After long searching I've found the answer to my challenge, but the last step fails. I have two identical servers that both serve multiple guests. The servers have two interfaces: one for the ...
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1answer
48 views

Bridging of Internal Network in KVM

I am working on a project regarding deployment of VMs as internal network, which should be accessible from external LAN, in KVM. I am stuck in bridging these virtual machines. My setup consists of ...
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55 views

How do I assign a Public IP to a Container in PROXMOX

I initially created vmbr1 and did not assign it an IP. Used it as a bridge for container that had the public IP assigned to it. It did not work. I don't understand what else needs to be done. auto ...
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linux bridge with vlans

I have a couple servers that I need to use lacp on that would hook in to the bridge for kvm to tap off of. I need to split out several vlans from there. my cisco switch has 2 ports set to trunk ...
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46 views

IP aliasing to a bridge interface under systemd

With Debian 8.1, how does one add a second IP address to a bridge interface under systems? Like in "IP Aliasing"? I tried it this way... In /etc/systemd/network subdirectory: File 40-br0.netdev ...
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How to correctly set up a bridge interface in GCE

I'm trying to set up a bridge interface as described in many docs, for instance: https://help.ubuntu.com/community/OpenVPN My setup in identical to that one, except obviously I used my GCE internal ...
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Minimal requirements to firewall rules for running dhcpd server in linux container

I want to run isc dhcpd server in lxd (lxc) container. But it does not recive clients requests (DHCPDISCOVER, DHCPREQUEST) from clients without this rule: iptables -I FORWARD -m physdev --physdev-is-...
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ubuntu 14: how to configure bridge for bonded interface?

We have a server connected to 2 switches via two NICs. On each NIC are 2 VLANs, management and production. Right now we only have one switch connected, so haven't setup the spanning tree etc. We ...
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Without tcpdump running, Linux bridge works selectively

Architecture: Ubuntu 14.04 as a libvirt/KVM host with one VM. There is bridge bri17 on the host, with two interfaces: eth2.17 (uplink to the Internet) and vnet0 (to the VM). Symptoms: all tests ...
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Ubuntu 12.04 - Issue with routing between ethernet and bond/bridge

I have a device which has 3 Ethernet devices and one WiFi-device on board. I'm using eth0 for an internal network (192.168.1.0/24) and eth1, eth2 and wlan0 to connect to an external network (192.168.0....
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112 views

What's the FreeBSD equivalent for the Linux pointopoint

What's the BSD (FreeBSD) equivalent of pointopoint used in /etc/network/interfaces on Linux (Debian)? I'm following this (Network configuration host system KVM/Routed) guide for how to use Hetzner's ...
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22 views

Two(one OpenVPN) Networks Routed to Two Seperate Interfaces

I currently have a working network configuration. It is setup so that my Debian router connects to my modem, grabs an IP from DHCP using the physical eth0 interface connected to the WAN port on my ...
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1answer
412 views

pfSense bridging Wi-Fi and LAN: allow access between Wi-Fi and LAN

EDIT: Why would I want to do such a thing? This is a test, and there is 1 machine behind pfSense that I wish to manage, and Wi-Fi makes that easy. Carrying on: The auto-suggessted topics by Server ...
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3answers
84 views

Assigning multiple IPs to the same machine with one interface

I have a server with a single physical interface eth0. I intend on running VMs on this server. To that end I have an IPv4 block which is routed to said server. What I'm trying to achieve is to spin-up ...
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84 views

Proxmox VMs with single IP

so I don't know much about the bridges and all, but I looked around and tried to get it still working. I've got one IP for the server itself and I thought to use second IP on the VMs. I thought I did ...
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LXC bridge with several IP addresses

While trying to setup a small server with LXC containers, I encountered a problem: I want to assign 4 different IP addresses: 1 address for the host and 3 addresses in a different net for the ...
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openvpn multiple bridged connections

Have problem connecting several physical network segments using openvpn, please help. Have 172.16.0.0/16 network that consists of 3 segments: First one: 172.16.2 with 172.16.2.1 linux router that has ...
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ARP cache getting null mac over a bridge

I have an interface eno1 and a bridge br0 $ ifconfig br0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 192.168.250.53 netmask 255.255.255.0 broadcast 192.168.250.255 ...
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19 views

Setting up bridge for domU to be accessed from external network(internet)

I am trying to setup virtual guests(PV) using xen 4.4 (xen-tools) on debian 8.3. Problem is that I fail to configure bridge properly I guess ^^. I have setup an interface xenbr0 that uses same IP ad ...
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1answer
177 views

Ubuntu + bridge +qemu + tap + virtio dropping packets

I've got what I think is the standard qemu bridge/ubuntu tap interfaces set up running variety of VMs on my Ubuntu host. All the VMs I'm having trouble with are Windows images. I have researched this ...
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1answer
133 views

CentOS7 Network Bridge Fails on boot until cable unplugged and plugged back in

I have a problem with a brand new CentOS 7 server I am trying to set-up. I have set-up a network bridge as per instructions on the redhat documentation website and it all works great until I reboot. ...
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OpenVPN TAP interface security

Background: I am very naive about how bridging works. I wanted to know bridging interfaces exposes devices on both ends of the bridge to communicate? Question: How secure is the openvpn tap ...