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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pfSense with a bridge as a LAN interface : traffic blocked between interfaces

I have a pfSense 2.0-BETA3 box as a home router. The box has 3 wired ETH ports and a wireless interface. It is configured as follow : WAN : vr0 LAN : BRIDGE0 OPT1 : vr1 OPT2 : vr2 OPT3 : ath0 ...
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121 views

KVM bridging for virtual machines is not working

After restarting the server, I can not ping and reach my virtual machines from the net and vice versa [root@pc1(192.168.0.114) ~]# ping 192.168.0.63 PING 192.168.0.63 (192.168.0.63) 56(84) bytes ...
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1answer
149 views

How can i prevent TINC from relaying DHCP

I am running tinc in several NAT routers running Debian 7 Wheezy, the VPN works fine for months, except because i've set it up in switch mode it relays DHCP requests and answers over all the VPN. The ...
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242 views

Filter broadcast traffic in a bridge port

I have a linux bridge with three interfaces, e.g. tap0, tap1 and tap2. What I would like to do is to modify the standard bridge behavior in the following way: If a L2 broadcast is originated from ...
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3answers
997 views

Bridging eth0 to wlan0

I'm trying to create the followig setup: +----------+ | Wi-Fi | +----------+ ...
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1answer
176 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 # ...
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1answer
259 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 ...
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101 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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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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1answer
369 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 ...
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1answer
3k 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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124 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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603 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
745 views

NFS and KVM. Slow Speed

I have a KVM virtualization in Debian with 2 guests (Debian and Windows 2008). I want to have a 'mount point' shared that can be accessed by the 3 system (host and 2 guests) at the same time. So the ...
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1answer
995 views

After configuring OpenVPN in bridge mode my serve becomes unreachable from an outside network

I have configured a Debian server with OpenVPN in bridge mode according to OpenVPN's ethernet bridging guide. As part of the guide I ran the bridge-start script which creates a bridge and tap ...
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1answer
831 views

Can I bridge IPv4 while routing IPv6 on the same two interfaces?

Is it possible to bridge aliased interfaces? And use their standard "parent" interfaces independently with full functionality? Here's the scenario: I have a Linux based firewall and router with two ...
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2answers
2k views

Centos KVM Host OS not passing all network traffic Guest OS

I'm running KVM on Centos 5. I have a guest OS, ubuntu 10.04, that has Snort 2.9 installed on it. The guest OS has (2) nic's, eth0 and eth1. One nic, eth0, is configured with an IP and can be ...
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398 views

Can ufw on a kvm host restrict traffic to guests?

I've set up a number of guests running on kvm on Ubuntu. Network access for the guests is via network bridge with br0 sitting on top of eth0. I have ufw running on the host machine and this is ...
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Random temporary network freeze on kvm guest machines

I'm running two guest machines under KVM. The host is running Arch Linux (kernel version 2.6.38.2), the guests are both CentOS 5.5 (kernel version 2.6.18). I have the networking set up as a bridge, ...
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806 views

trying to figure out how to bridge two virtual networks together and in turn bridge that to the internet for a virtual inline IDS/IPS system

I'm trying to figure out how to bridge two vmware (server or workstation, workstation) or virtualbox networks together with a linux IDS/IPS system transparently inline between both the virtual ...
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1answer
990 views

router advertisements do not go through wired/wireless bridge

The full setup: A Netgear CVBG834G cable modem+router (4*Ethernet+WiFi) configured in bridge mode (and WiFi shut down) whose sole role is to serve a public IPv4 address on its LAN port to... an ...
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3answers
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Proper network configuration for a KVM guest to be on the same networks at the host

I am running a Debian Linux server on Lenny. Within it, I am running another Lenny instance using KVM. Both servers are externally available, with public IPs, as well as a second interface with ...
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2answers
4k views

No ARP reply on tap0 (KVM bridged networking)

I wanted to assign an external IP address to my KVM guest and went the bridged networking way. Unfortunately the guest has no network connectivity and I don't know why. After investigating it seems ...
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391 views

Bridged NIC's but only one active

I've "Bridged" the NIC's in my Server 2003 box but when I do a large file transfer, I see that only one is active at a time. What do I need to do to spread the love across both NIC's? I'm hoping to ...
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How to share internet connection on Mac OS X to Virtualbox vm’s using Host-only

In one line : is the following possible : Airport <- "OS X bridge" -> vbox-Host-only -> vm's Virtualbox (3.1.4) setup : Host : Mac OS X 10.5 Guest : Ubuntu Linux adapter1 - Bridged (en1: ...
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Issue with multiple bridging for KVM hosts

I'm using KVM and libvirt on my host (Debian lenny) + 2 bridges per guest (one for mgmt, one for public traffic). That setup isn't stable at all, sometimes I can do pings to a management ip, sometimes ...
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856 views

Linux software bridge

I have following setup: I want to send files from 10.1.1.7 to 10.1.1.3 with the caveat that if link AB goes down, then file transfer should switch to link AC and CB. However, problem is that the ...
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3answers
542 views

Constantly varying download rate with a complex xen networking setup, why?

The network configuration in my Xen setup is the following: the dom0 has 3 network cards (eth0, eth1, eth2), 3 brigdes (xenbrE, xenbrI, xenbrD) and each brigde integrates the corresponding network ...
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227 views

Booting a diskless Debian system using bonding, bridging, and iSCSI

I'm trying to build my personal holy grail: booting my Debian Wheezy KVM server diskless from a iSCSI target and the only configuration needed on the diskless server is the iSCSI parameters in the NIC ...
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How to assign multiple public IP address for 3 KVM guest using a single NIC [closed]

i've a CentOS 6.5 KVM Host with 3 KVM-Guest CentOS 6.5. Now I want to assign a public IP for the host and one public IP for each guest using a single network interface. My IPs (assigned by network ...
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How to configure the bridge over bonding in RHEL 6.4 Server?

Has installed a system (rhel-server-6.4-x86_64-dvd.iso). KVM over which set. The host machine and the guest-machine assigned its own IP-address, configured for this bridge br0. Everything works. Now ...
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386 views

Networking with lxc containers with local dhcp and external ipv6 double bridge problems

I want to use both ipv6 externally on all my containers, and ipv4 external only on the hosts. I am using Ubuntu 12.04 64bit. For ipv4 on the container I use the DHCP that came with the lxc ...
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1answer
532 views

LXC container with bridge networking exposes fake MAC address to external network

I'm running LXC container (lxc 0.7.2-1) on Debian squeeze with bridge networking configured by the book with public IP and I have problem that it exposes fake MAC address from LXC container to ...
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1answer
239 views

Linux bridge static IP using only one NIC

It seems like I have a generic problem, but can't find any solution - every solution that I found so far on internets doesn't work for me. Let me first try to explain what I am trying to do - I have a ...
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1answer
357 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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1answer
489 views

Xen HVM Windows 2008 network bridge

I have a problem with the Windows Server 2008 guest (hvm). I can't get a network interface running for him. I also have a Debian guest and it's working ok, but I can't do it with the Win2k8 guest. ...
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127 views

dsl router for bridging two lans

I have two office locations that each have DSL service. I have the routers set up so that the two subnets, 10.0.1.x and 10.0.2.x, correctly keep data on each subnet and or pass across to the other ...
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1answer
49 views

Spam filtering in bridging

I'm using sendmail with spamassasin, one of my server is working behind it. All the port 25 traffic for the server behind it is being filtered. User are using SMTP authentication enabled in ...
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849 views

Site-to-Site IPSec VPN: bridged only

I'd like to setup a site-to-site IPSec VPN tunnel between a head office and a branch office, and for political/security reasons, with the sole purpose of being able to access a "Management" subnet at ...
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4answers
806 views

Can we connect LAN (Ethernet) with a wide area network?

Suppose we want to connect a local area network (Ethernet) with a wide area network, the question arises is, can we connect a local area network with wide area network? If we directly connect the ...
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397 views

How do bridges really work?

I'm in a major confusion here, regarding bridges. I thought that they were devices that allowed going from one network to a different one without routing (doing the work at layer 2 instead), but if ...
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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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2answers
1k 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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464 views

Proper way to expose VirtualBox' machine to network via “one MAC” security locked switch port

Say, we need to expose LXC container (LXC) or Virtualbox VM (VBM) to public network with its own IP-adress (within additionaly assigned network — ADD-net) which is to be routed through main host. When ...
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Virtual Box: Bridging to Virtual Interface (eth0:1)

I have four IP addresses on my Debian machine: 1 main (eth0) + 3 extra (eth0:0, eth0:1, eth0:2). I want to assign the eth0:1 as bridged network to my VM. Who do I need to add in the ...
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Xen network-bridge interface renaming

According to the comments in Xen's network-bridge script, the process of starting the bridge with external interface eth0 is thus: # Creates the bridge # Copies the IP and MAC addresses from eth0 to ...
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617 views

Cross-VLAN sharing and auto-discovery of selective resources

I have a network with several VLANs that each contain resources or clients with different access rights. For simplicity, let's say I have 3 VLANs: ID 10: Contains privileged clients and private ...
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1answer
87 views

Prevent hijacking IPs in a bridged network (KVM/libvirt)

Is there a solution to prevent a VM user assign/use IP addresses he doesn't own but are routed over the same bridge like his own addresses? The current setup looks like this with libvirt and KVM: ...
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1answer
738 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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248 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 ...