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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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
191 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
118 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
710 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
444 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 ...
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2answers
106 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
139 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
208 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 ...
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1answer
404 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 ...
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1answer
1k 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
222 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
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2answers
271 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
378 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
178 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
88 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. ...
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1answer
2k 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. ...
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1answer
1k 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 ...
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2answers
1k 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 ...
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0answers
558 views

openstack, bridging, netfilter and dnat

In a recent upgrade (from Openstack Diablo on Ubuntu Lucid to Openstack Essex on Ubuntu Precise), we found that DNS packets were frequently (almost always) dropped on the bridge interface (br100). ...
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1answer
108 views

Server ethernet bridging, fail-safe [closed]

Is there server hardware available with two ethernet ports, that can turn into a fail-safe bridge when offline? My use example is a server that does filtering and traffic monitoring on an ethernet ...
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1answer
275 views

Debian bridged network between virtual machines

I installed two linux containers (lxc) in a debian squeeze server so the environment is as follows: Physical server: 192.168.2.200 Linux container 1: 192.168.2.201 Linux container 2: 192.168.2.202 ...
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2answers
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Debian: Should I add vlan interface into bridge for KVM?

I am setting up a Debian Squeeze box as a KVM host. I want to add multiple interfaces to each KVM guest so I want them to be on different VLANs. After reading about this, I believe the best method is ...
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1answer
287 views

Virtual bridged networking with VLAN, could not ping

I require a virtual network with VLAN be build between two virtual hosts - which can be (lxc/ vbox -ubuntu or win xp). I tried with lxc and vbox with Ubuntu and was finding difficult to make it work ...
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2answers
217 views

Ubuntu with KVM guest VM and broken bridges

I have an Ubuntu box with a KVM guest VM running. They use bridging so the guest VM attaches to the physical network of its host. The guest VM has 2 NICs in 2 different bridges. First NIC of the VM ...
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1answer
2k views

Stop duplicate icmp echo replies when bridging to a dummy interface?

I recently configured a bridge br0 with members as eth0 (real if) and dummy0 (dummy.ko if). When I ping this machine, I receive duplicate replies as: # ping SERVERA PING SERVERA.domain.local ...
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1answer
526 views

Possible for linux bridge to intercept traffic?

I have a linux machine setup as a bridge between a client and a server; brctl addbr0 brctl addif br0 eth1 brctl addif br0 eth2 ifconfig eth1 0.0.0.0 ifconfig eth2 0.0.0.0 ip link set br0 up I also ...
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0answers
397 views

Two servers on the same network can't ping eachother

According to this guide I setup two servers. Now these two servers can't ping each other, this is arp -n result: # arp -n Address HWtype HWaddress Flags Mask ...
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2answers
170 views

Wireless bridge settings

Using two TP-Link WA-5210G, I am trying to create a network bridge between two networks, netA and netB. I want to share my internet connection from netA to netB, using the AP from netB. netA :: ...
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3answers
476 views

Network bridging in VM broke connectivity to host; what did it do?

I screwed something up royally, but I want to understand how exactly I screwed it up. Bear with me because I'm not a networking expert. Here is how my network is configured: [HyperVHost] ...
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1answer
710 views

MAC address table in Windows

How can I see the MAC address table of a Windows network bridge? Is it possible trough command line to find this information? EDIT: I am interested to see the same table that it is possible to see in ...
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1answer
755 views

IP Bridge for KVM with multiple subnets

I have a machine set up running KVM and a bridge on eth0 with the ip address for the machine. The machine has an IP address in a range with no more ip adresses free. I am trying to make a second ...
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2answers
388 views

How can I prevent the locally administered bit being set on network bridge MAC addresses in Windows?

When adding network adapters to a network bridge, it generates a new MAC address from one of the unbridged ones but with the locally administered bit set. For example, if the original MAC address is ...
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1answer
165 views

Multiple IPs on eth0, bridging to VMs and routing

Current situation: I have a host running 3 virtual machines. One IP for eth0 (xxx.xxx.xxx.239) and one additional for eth0:1 (yyy.yyy.yyy.35). This works fine for me... Host (eth0) (xxx.xxx.xxx.239) ...
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1answer
80 views

LAN accessible Webserver with private Internet connectivity

I am a bit of a newbie and may not be using the right terminology here, but trying to be complete in the query. I am trying to setup SugarCRM+Apache on an Ubuntu box with two network interfaces. eth0 ...
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1answer
388 views

Bridge Networking in XEN other than Default xenbr0

i need to create a bridge with public ip for assigning public ip to VM. But how can i create a Network bridge,as there is a default "xenbr0" bridge exists. Editing Xenbr0 is not permanent,how can i ...
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2answers
226 views

how to setup a bridge for vpn in a second eth interface acting as a router?

I'm trying to create a bridge in order to setup an openvpn server in an ubuntu box, which acts as a router for a local network on eth2, but without success. This is my last conf, but every time I ...
2
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1answer
310 views

xen and libvirt bridge configuration

I have a Centos 5.5 server with Xen 3.2 and libvirt for virt-manager installed. Before installed libvirt I have the bridge configuration just like the documentation on Xen says: xenbr0, eth0 and ...
2
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1answer
2k views

Assistance with bonding vlans and bridges on Ubuntu 12.04

We're trying to set up four nics in bond0 with 3 tagged vlan's and three bridges for KVM VM's on Ubuntu 12.04. Using the interfaces file below I can manually start and stop networking and get the ...
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0answers
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ddwrt - multiple wlan each on own vlan - confused

I have a WRT610n running DDWRT v24-sp2. My goal is to setup: Single connection from switch to WRT610n, and switch passes tagged VLAN 50/40 and 1 (untagged) On WRT610n the 3 LAN ports (eth1/2/3) and ...
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2answers
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How to bridge a range of public IPs to KVM virtual machines on Debian/Ubuntu

I've been trying for weeks to figure out the right network configurtion for sharing a range of public IPs with KVM virtual machines running on my server, but so far with little luck and with the help ...
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1answer
665 views

How do I keep a bridge enabled on a bonded interface?

I'm working on setting up a pair of CentOS 6.3 servers that will run a couple of KVM vms and have come across a problem setting up a bridge on a bond. I am using Mode 4 (802.3ad) bonding on a pair ...
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1answer
111 views

Accessing WRT54G admin through WET610N bridge

I am using a WRT54G router to host a few computers and servers. I have another computer that is wired to a wireless bridge, which is a WET610N. How do I access the admin page of my WRT54G through my ...
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0answers
305 views

kvm bridge network not working

I have several KVMs and using public bridge mode. VMs can talk to each other but VMs can't access real network and the host can't reach VMs. One weird thing is that it used to work before and it ...
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2answers
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KVM/Libvirt bridged/routed networking not working on newer guest kernels

I have a dedicated server running Debian 6, with Libvirt (0.9.11.3) and Qemu-KVM (qemu-kvm-1.0+dfsg-11, Debian). I am having a problem getting bridged/routed networking to work in KVM guests with ...
2
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1answer
446 views

firehol (firewall) with bridge: how to filter

I have two interfaces: eth0 (public address) and lxcbr0 with 10.0.3.1. I have a LXC guest running with ip 10.0.3.10 This is my firehol config: version 5 trusted_ips=`/usr/local/bin/strip_comments ...
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1answer
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Routing Traffic on Ubuntu to give Raspberry PI Internet Access [closed]

I'm hoping someone can point me in the right direction for setting up my Linux (Ubuntu 12.04) box to route traffic from eth0 to wlan0. I'll try and explain the problem I am trying to solve: I ...
3
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2answers
127 views

need advice on data center move, communication with both facilities during transition

We are beginning the process of moving to a new facility. Office and warehouse operations will both be moving, and we must get shipping operations up and running at the new location while continuing ...
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1answer
482 views

Adding vifs to bridge under Xen suddenly stops working

We have a setup here with around 30 Dom0s running Xen 4.0.3 with a Dom0 Kernel of 2.6.32.57 x86_64. (We have seen the same behaviour with Xen 4.0.1 and kernel 2.6.32.2X earlier) Sometimes all of a ...