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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FreeBSD 9.1; bridge0 and default gateway issue

I've got a FreeBSD 9.1-RELEASE-p1 system with three nics, I'm using: igb0, sfxge1 and sfxge2. igb0 used for internet access and is default gateway. Other two nics, I need to use to create bridge0. ...
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3answers
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Bridging eth0 to wlan0

I'm trying to create the followig setup: +----------+ | Wi-Fi | +----------+ ...
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4answers
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Differences between bridged and NAT networking

I don't fully understand the differences between NAT and a bridged connection over an virtual machine. As far as I've found, machines which are on the same network with our host machine can access our ...
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1answer
193 views

Convert wifi to wired using wireless router [closed]

I have a TP-Link WR740N, a Raspberry Pi (With only an ethernet port for Network), and a Wifi connection. Is it possible to use the wireless router to bridge the Pi with the Wifi connection?
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0answers
711 views

arp reply is not processed

My eth0 interface does not process a legitimate arp reply. When I try to ping a host, I see arp request and reply with tcpdump from the host I try to ping from, but ip neigh says that there is a ...
0
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1answer
166 views

KVM guest can't find gateway

I try to setup a KVM server with bridged networking. I followed the docs, but still can't get it working. The guest system can ping the host system and the host the guest system, so the connection ...
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2answers
1k views

Bridge networking static IP's to virtualbox VM's

Ok, so I have a dedicated server with the static primary IP address 89.200.xx.xx, it's running 3 VM's in virtualbox (all Centos 6 as is the server) and I have 3 other IP's that I want to assign to the ...
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1answer
205 views

Changing Linux Layer2 forwarding decision?

Are there tools to define in Linux something similar to Policy-based Routing, but on Layer2 level? Usual Linux bridge uses destination MAC to decide, which interface to send frame to. Can this ...
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1answer
1k views

VirtualBox Bridged Network to Debian Fails to connect [closed]

I am running Oracle VM VirtualBox Manager v4.2.0 r80737 on Microsoft Windows 7 and aiming to set up a bridged network to my Debian Linux 6.0 Virtual Machine to be able to connect to it via Local ...
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2answers
297 views

Ubuntu Server 12.10: set up network bridge in the initramfs pre-boot environment

In this scenario, I have a machine that boots its root volume off of iSCSI, and it only has a single network interface. If network configuration is done the normal way, then taking the interface down ...
0
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3answers
1k views

Cannot ping from a bridged inteface

I am trying to bridge between eth2 and br0 from ubuntu 11.04 within virtual box. There is network bridging to host physical machine. From the guest OS after bridging I can ping from br0 but ...
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4answers
1k views

Bridge to a used eth1 card without losing connection via that card

How can I set bridge between a real eth card on a remote machine without losing my ssh connection to that machine. I ssh into a machine via its eth1 iinterface. 172.168.40.2 255.255.255.0. I ...
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1answer
866 views

lxc vm access outside the host

On Debian 64bit, I configured a lxc like this : host ip : 172.16.0.25 vm guest on this host : 172.16.0.44 I've done the bridge on my host auto eth0 iface eth0 inet manual up ...
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1answer
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eth0 on lxc does not work

I am facing some problems that the eth0 on lxc container does not work. I already tried Bridging LXC containers to host eth0 so they can have a public IP, but it does not help. On my host (Ubuntu on ...
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1answer
1k views

Static route without knowing the nexthop (linux)

I have an eth3 interface in a linux router, with an adsl modem. This adsl modem is in bridged mode, so the public IP is assigned to eth3 (say 11.22.33.44), and the modem is just not seen by my server. ...
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1answer
1k views

bridging two network interfaces in ubuntu linux 12.10 AND being able to access it from that machine

Ok, i have about had it but heres the deal. I have 7 total machines connected like this: [5 workstations]<--->ServerPC<---->MAINPC<---->router FYI, dont worry about the workstations they ...
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1answer
145 views

KVM guest has a wrong outgoing ip address

I have a KVM host with a bridge configured on eth0 that has a public ip: auto br0 iface br0 inet static address xx.xx.aa.111 netmask 255.255.255.0 network xx.xx.aa.0 broadcast xx.xx.aa.255 ...
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3answers
387 views

Connect to internet through DC with 2 network interfaces

I have a network like this : Client 1 <== Wireless ==> Access Point <== Wire ==> DC <== Wireless ==> ADSL Modem Client 1 : IP : 192.168.1.181 DG : 192.168.1.100 DNS : ...
2
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1answer
171 views

Is it secure to expose LAN to bridged DSL modem?

I connected my router and DSL Router (in bridged mode) together like this: (click for full image) Strange setup, I know. :) The reason was I wanted my DSL router to continue to work as a switch and ...
3
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1answer
543 views

Assign public and private IP addresses for a KVM guest

I would like to create a KVM guest with two different IPs, like one public IP and another private IP for the same KVM guest. My host is 210.x.x.x. Series and Guest are also configured with the ...
8
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2answers
3k views

Jumbo frames between KVM guest and host?

I am trying to implement a 9000 byte MTU for storage communication between KVM guests and the host system. The host has a bridge (br1) with a 9000 byte MTU: host# ip link show br1 8: br1: ...
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1answer
106 views

Bridging Networks Between Buildings

I'm trying to set up a WiFi link between two buildings. On one side I've got a regular SoHo (network A) router (Linksys EA4500) and on the other side I've got an Alfa AWUS036H (network B) connected ...
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1answer
1k views

KVM is NOT seeing multiple bridges (only macvtap devices)

I am in the process of doing some thesis research about using ebtables and iptables on a KVM host to perform on-the-fly firewall restrictions to KVM guest VM's. Here is the problem: I have a bridge ...
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0answers
90 views

STP on a bridge

I have set up a bridge on an interface em1 and connected 4 vms to the bridge. I disabled stp on the bridge. There is no chance of looping as there is only one bridge in this setup, there occurs a BPDU ...
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1answer
562 views

Xen: can't get Dom0 and the DomUs to ping eachother

We have installed a Xen (4.1) configuration and can't get Dom0 and the DomUs to communicate (ping eachother). The DomUs are able to ping eachother but not Dom0, and Dom0 cannot ping the DomUs. We ...
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1answer
3k views

Use one NIC to create multiple interfaces for Linux KVM

I am working on a thesis research project, and I am having some difficulty figuring out how to make one NIC spawn several "bridge" interfaces such that each KVM VM can be seen on the local network. I ...
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0answers
494 views

VirtualBox - multiple guests, each with a single bridged adapter?

I am running a dedicated server (located at Hetzner, Germany) that runs VirtualBox in order to virtualize several services accross multiple virtual guests. Those guests are supposed to communicate ...
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1answer
515 views

Can't get network bridging to work

I'm trying to make network bridging to work on a Debian squeeze (I'm experimenting in order to make a QEMU/KVM virtual machine that will be visible to the outside network as if it were a distinct ...
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1answer
375 views

Martian source in log of machine1 after ssh-DNAT to virtual machine located on machine2 (machine1 and machine2 xover connected)

My scenario 2 physical machines, each with 2 network interfaces (eth0, eth1). they act as virtual machine host for one machine alone, the networking works with no problems first i had two ...
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1answer
244 views

networking with one NIC and access to internet and virtual machines

I have installed opennebula and I have followed this tutorial. Unfortunately I cannot ssh to the virtual machines that appear to be in a running state and already have an IP. The problem might be that ...
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2answers
847 views

Bridge NICs with automatic pass-through

I am looking at using a computer with a dual-NIC card (one with two NIC ports) as an in-line traffic shaper / URL filter / traffic analyzer, etc. (probably using pfSense), but I am concerned that if ...
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2answers
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Bridging LXC containers to host eth0 so they can have a public IP

UPDATE: I found the solution there: http://www.linuxfoundation.org/collaborate/workgroups/networking/bridge#No_traffic_gets_trough_.28except_ARP_and_STP.29 # cd /proc/sys/net/bridge # ls ...
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2answers
306 views

Is there a way to create virtual network between vm on xen with out creating shared bridge with n/w interface

xen 4.1.2 is running with ubuntu 12.04 as dom0. I need to enable networking between vm only(which means not creating a bridge between Ethernet card and sharing among vm). when i installed ...
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1answer
155 views

Connectiong adsl router/modem and router with bridgemode

I have one adsl modem/router which is not "top" of the line and it lack allot of options which I need. I was able to acquire one Cisco router recently which has all options that I need ( like DMZ, ...
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1answer
1k views

bridged connection for windows 7 host and ubuntu guest in vmware player [closed]

I installed ubuntu on my laptop in vmware player 5.0.0 build-812388) under windows 7. I do coding in ubuntu and would like to connect to ubuntu remotely with ssh. From My understanding, I need to use ...
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3answers
73 views

How to find host of an unidentified VM in a network? [closed]

For example someone have installed server with a DHCP on VM connected to a corporate network breaking its operation, so I have IP of that VM, but how to find out IP of its host system ?
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1answer
711 views

Network Bridge in dom0 can not ping domU's

I am using Debian wheezy with XEN 4.1. I have two network bridges xenbr0 and xenbr1. xenbr0 is linked to the real-eth0-nic so the domU's can talk to the outside world, which worked fine. xenbr1 was ...
0
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2answers
159 views

Linux: how to verify my network configuration before doing a restart

I am trying to build a network bridge for my VMs on a server. So I added a new file and changed another in the /etc/sysconfig/network-scripts directory. Then I did a network reboot with the ...
2
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1answer
189 views

Access to WAN from one VLAN

i want to create a VLAN for 3 guest VMs. I already have it and every VM can ping each other, but the problem is that any guest CAN NOT have access to Internet Network configuration in Host machine # ...
0
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1answer
297 views

openvpn in a bridge?

I have a somewhat tricky proble to solve. We have a wireless link between 2 building. One of them has an mikrotik and below there are some vlans. Some machines of one vlan need to use openvpn to ...
0
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1answer
534 views

KVM with external IP without NAT?

I have a CentOS 6.3 server with 1 NIC (eth0) and an external IP (lets say 1.2.3.4). On this server I'm running a CentOS 5.6 KVM with the "default settings" (virbr0 on 192.168.122.x). What I want to ...
0
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1answer
2k views

Cisco 877 as PPPoA/PPPoE bridge (no routing) - how to make it listen to IP for management?

I have a Cisco 877 configured to bridge ADSL with PPPoA to PPPoE on Vlan1. This works fine, but in this mode the only way I can configure the Cisco is via the serial console. I'd like to have the ...
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1answer
317 views

Connect ADSL modem SMC7904WBRA-N to CISCO RV082

I have a SMC7904WBRA-N ADSL modem/router that connects to the internet with a static IP given by the provider. I've received a RV082 to create a VPN connection which is having problems to connect to ...
5
votes
2answers
486 views

Creating a network link between 2 very close buildings

I have a charity who have two adjacent medium sized modern detached houses (in the UK): the buildings stand next to each other and are less than 5 metres apart. They have DSL connected to a single ...
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1answer
588 views

Openstack - Connectivity between instances on 2 separate nodes

I have the following setup: 1 x Management Node (node A) 2 x Compute Nodes (node B & C) 1 x Volume Node (node D) Relevant configurations: VlanManager multi_host=true Node ...
2
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1answer
288 views

bridging real and virtual wireless network interfaces

I have 2 wireless interfaces, one real (eth1) and one virtual (vt0), running on top of the same physical wireless adapter. Both have separate IP address spaces. eth1 is connected to a laptop, and vt0 ...
2
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1answer
105 views

how to block access from bridge mode vpn nodes to my wan gateway

We have a tap bridge between 2 local networks. It work great except that clients from the 'other' network can use dhcp server and most important can use wan gateway of the second network which is bad. ...
2
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1answer
3k views

Centos/OVH: public IP on KVM virtual machine

Since a few days, I'm trying to configure my KVM vm to have a public IP address, without any success. First, I'm on OVH, and you need to know they don't allow networking from different mac addresses. ...
0
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1answer
3k views

Linux bridge (brctl) dosnt forward IP packet when router is one of the bridge endpoints

I have setup a brctl bridge on Ubuntu with the following deployment: Cisco router -> Linux bridge -> client computer The bridge forward the following packets types: ARP,STP, but doesn't ...
2
votes
2answers
2k views

Cannot access LAN Printer

Environment: I have a Brother 7360N Network Printer connected to a TPLINK Router over an Ethernet cable. My desktop, running Windows 8 is connected to the TPLINK Router over an Ethernet cable. A ...