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. Instead, it depends on flooding and examination of source addresses in received packet headers to locate unknown ...
1
vote
2answers
47 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 ...
0
votes
3answers
41 views
Bridge ppp0 and eth0
I have seen many posts explaining bridging eth and wlan interfaces. I would like to know if it is possible to bridge ppp0 interface (a USB modem) and eth0. I have a working internet connection through ...
1
vote
0answers
30 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 ...
-2
votes
2answers
70 views
Bridging: OpenBSD vs Linux [closed]
The bridge interface under Linux is quite dumb. In the end, it's just very inconvenient to use: you have to delete all IP configurations from the attached interfaces and somehow migrate the ...
2
votes
1answer
53 views
Configure linux machine as bridge/switch and end device
At my home, I have two desktop PCs in two rooms. The router / DSL modem is in one of these rooms. Now I want to configure a home server (having 2 LAN ports, running 24/7) in the corridor between the ...
1
vote
1answer
107 views
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 ...
4
votes
1answer
82 views
Creating a private network for two VMs
I am trying to create two VMs which are both connected to the same private network. I'm using Linux with qemu-kvm 1.0.
My plan of attack has been this:
brctl addbr bridge
ifconfig bridge up
tunctl ...
0
votes
1answer
55 views
DELL switch CAM table don't show MAC from different network
I'm solving problem with slow DHCP request/respons about 45 secs...toplogy is [L2] DELL 6248 -> [L2->L3] router (cisco) -> firewall Debian server with DHCP -> gateway to internet
I think that problem ...
10
votes
2answers
134 views
bridge network between two linux servers
I need to set up following network architecture :
Internet
^
+-----------------+ | +------------------+
| Centos6-1 | | ...
0
votes
1answer
112 views
Bridge Intrusion Prevention Vyatta
I am trying to create a bridge with ThreatStop, IPS and block a few ports. This bridge will sit in front of my servers. All is working apart from the IPS.
I have read the documentation on configuring ...
1
vote
1answer
142 views
VMWare Player guest does not re-aquire IP on bridged interface after host loses and re-acquires network connectivity
I am running a Ubuntu Linux image in VMWare Player on my laptop. The host is Windows XP.
There are two network adapters configured in VMWare Player - one is host-only and the other is bridged. ...
3
votes
2answers
179 views
How to bridge multiple wireless access points (and internet entry points) into one network
I have two DSL lines coming in to wireless access points and then running to a RV082 Gateway/Bridge. The gateway then runs to a switch, which runs to multiple PCs and a Printer (See picture below). ...
3
votes
1answer
118 views
Can I set up two NICs bridged together and still SSH into the bridging machine?
I have a ubuntu box setup with two NICs. I can bridge them together just fine, but I haven't been able to setup a way to SSH into the box once the connections are bridged together. Here's my ...
0
votes
0answers
40 views
setting up bridged adapter for VPN server
I have an Ubuntu linux Linode server that I am trying to install OpenVPN on. I'm following the tutorials (which, it turns out, are quite incomplete).
auto br0
iface br0 inet static
address ...
0
votes
0answers
119 views
Configure DD-WRT v24 as AP with multiple ESSIDs, 1 per VLAN, and non-tagged management IP interface
I found some tutorials doing part of that but I am unsure how to get a non-tagged IP interface for management. Some test setups failed with an inaccessible DD-WRT box:(
My hardware: Siemens SE505 v2
...
0
votes
2answers
82 views
Secure tunnelling networks with linux
I would like to build some kind of "virtual network" between two companies located in two different countries.
This way, an LAN machine (192.168.x.x) located in the A company could ping directly a LAN ...
0
votes
0answers
120 views
Best way to bridge two networks protected by Endian firewalls
We are being forced to move our servers from one rack in the data center to another - and will have access to our Internet IP block live in both racks. I want to be able to power down a server, move ...
0
votes
1answer
193 views
Create and bridge virtual network interfaces in Linux
I have a tool that replays traffic from a .pcap file and another tool that interprets that traffic. For testing purposes, I need to play traffic out one interface and have it come in another. ...
0
votes
0answers
170 views
Can't ping from VM to node on host network, but can arping
I have a KVM instance running inside of an Ubuntu host. I'm not able to ping/connect from the VM to the private interface of a physical node on the same private network of the host, although I can ...
0
votes
0answers
77 views
How to write a netfilter kernel module and use it? [closed]
First, let me describe my application. Maybe I don't need to code anything. (Jump to "In Short" if impatient).
Application
I have a network (EtherCAT) that uses its own protocol of communication. It ...
0
votes
0answers
359 views
Use MikroTik Bridge as a Public IP Firewall for Public Hosted Servers
We want to do this:
Internet<->MikroTik in Bridge Mode with Firewall Filter<->Hosted Server
The primary objective is to allow RDP and FTP in from the outside but block everything else from ...
0
votes
0answers
131 views
Install KVM on VPS how to configure network bridge
I want to install KVM on my VPS server, but I don't know much about setting up network bridges unter Linux (Debian Squeeze).
In /etc/network/interfaces I have no eth0 controller, there is only
# ...
1
vote
1answer
135 views
Force linux bridge to obtain ip via DHCP
I'm trying to understand the logic behind the failure in the following scenario:
a. If a linux bridge with 2 interfaces, eth0 (LAN) and eth1 (WAN) is behind an ISP device e.g. a cable modem, it does ...
1
vote
1answer
132 views
KVM VMs and virtual network, how to assign external IP addresses?
So, my question is: there is a remote server on Red-Hat with an external IP-address, eth0: inet addr: 87.112.140.53 Bcast: 87.112.140.255 Mask: 255.255.252.0, and is a virtual interface, which raises ...
0
votes
1answer
87 views
configuration of bridge to send traffic to external switch
I created 3 VM on top of KVM/QEMU (RHEL 6.0) using bridged networking. Created one bridge for eth1 and all the VM's are using that bridge for networking. All these VM's have the same subnet address. ...
1
vote
1answer
154 views
Opennebula KVM onevnet
I am experimenting with Open Nebula and KVM and so far I have a frontend and a few hosts (all hosts have two NICs for redundancy).
I know that KVM makes on the hosts a virtual interface virbr0.
...
0
votes
0answers
56 views
KVM network problems
I use ConVirt as virtualization platform. pbr1 works as gateway. When I try to ping any IP from the VM, it says, that destination host is unreachable. When I try to ping the gateway, it does. Packets ...
0
votes
1answer
128 views
Combine two NIC's into one preserving routing (DMZ server / Windows or Linux)
We have a DMZ server with two NIC's, one is accessed from the Internet (public IP) and one from behind the internal firewall (private IP).
One application has problems to cope with a 2 IP's / 2 NIC's ...
0
votes
0answers
188 views
route all internet traffic via a virtual tap device and a public server on windows
We want to route all traffic from one pc to a local virtual device (TAP-Win32 Adapter which is also used by OpenVPN) and then from there to another tap device on a public server. after that all ...
1
vote
3answers
228 views
iptables / bridge / NAT setup
Between our gateway and our LAN, we have a bridging firewall running iptables. I want to add an additional NIC into the firewall and set up a private subnet on it. Traffic from this subnet which is ...
0
votes
1answer
318 views
Linux storing arp cache entries using wrong interface
I'm trying to get two virtual machines (running CentOS) to talk to host (Ubuntu 10.04) using VDE and the outside network.
So far I'm running into an ARP issue.
On Host I have a physical eth0 and a ...
3
votes
2answers
409 views
How do I put a bridge on top of a bonded interface?
I'm setting up a Ubuntu Server 11.10 box with multiple Ethernet interfaces that are bonded for redundancy. I'm planning to use it as a KVM host, so I'll need a network bridge.
To accomplish this, I ...
2
votes
1answer
382 views
Linux bridge (brctl) is dropping packets
I have been researching this problem for a few days and have not found an answer yet. Your help will be really appreciated!
I have a few VMs (Virtual Machines) running on a physical server. The ...
1
vote
0answers
64 views
Problems with umlauts and git-svn
I've got the following problem:
I checked out an GIT-repository created by tortoise-git under windows. German umlauts like "öäü" are shown as \x-Codes under my linux.
That's basically no problem ...
1
vote
1answer
51 views
fail2ban with bridge-util
Hello and happy new year,
I am wondering if I can use fail2ban on a virtual host that uses bridge-util.
I am using LXC containers for virtualization and have therefore direct access to all the log ...
4
votes
1answer
261 views
How can I change the MAC address of a network bridge in Windows?
I use DHCP reservation rather than static IP for convenience, and that relies on the MAC address of my computer.
I recently bridged my main adapter with my VirtualBox adapter. When things stopped ...
1
vote
0answers
148 views
IGMP V3 support in Linux-2.6.35
I am trying to start a bridge connection and force it to use IGMPV3.
The following command will explain my issue better :
The below is the output of force_igmp_version before issuing brctl commands ...
0
votes
3answers
152 views
KVM bridging for virtual machines not working?
I'm currently setting up a KVM with several VM guests. I created the first one but I ran into the first problem already:
root@vm1:~# ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
From ...
0
votes
1answer
106 views
Is there a way to install L2TP and OpenVPN on one machine and bridge between both VPNs?
I am trying to install both OpenSwan-L2TP and OpenVPN on a Debian server and bridge between both server, is there a way to do that?
2
votes
1answer
234 views
KVM and bridge_stp setting
In which situation one should enable the bridge_stp for the host bridge when using KVM?
Is it worth keeping it disabled when not needed?
0
votes
1answer
131 views
Add Two Bridged Interfaces on Ubuntu for KVM
I have ran the following;
sudo /usr/sbin/brctl addbr br0
sudo /usr/sbin/brctl addif br0 eth0
And added the following to /etc/network/interfaces;
auto br0 # for XPProxx86 KVM
iface br0 inet dhcp
...
1
vote
2answers
153 views
Real life virtual bridge setup on Debian
How do I get the bridge setup done with multipe IP addresses.
Ideally, I would have 4 virtual systems each with it's own IP address but also an intranet address (like 10.#.#.#).
So that they can ...
2
votes
1answer
67 views
Trouble with NATing
I'm a networking noob, so sorry for the very generic title. I have the network setup in the following way:
A few details about the network:
eth0 on all the devices have an in IP in 10.10.10.0 ...
1
vote
1answer
133 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 ...
0
votes
0answers
171 views
ARP reply vanishes from br0 to tap0 using OpenVPN in bridging mode
i have setup a linux box (on an esxi5) which acts as an openvpn server. the server is configured to use bridging for the clients, which essentially works, with one exception.
if the client pings some ...
1
vote
2answers
80 views
Point to Point wireless network
I have to link two offices 0.62 miles apart with a wireless link. So far my setup is as follows :
2 24db directional parabolic wifi antenna
1 watt wifi amplifiers on each antenna
Access point on ...
-1
votes
1answer
123 views
How do I configure a Huawei b520 ADSL router to work in bridge way?
I have a much better router now, Cisco e4200 but I still have to use the Huawei b520 router because the internet connection is using ADLS.
I want to configure b520 to act in a bridge mode and be ...
0
votes
0answers
113 views
how to setup a secure kvm network on a debian for usage with muliple zones and multiple ips?
what i have
one host
with 3 public ip adresses
1 nic (connected to the WAN)
ips:
xxx.xxx.xxx.xx1
xxx.xxx.xxx.xx2
xxx.xxx.xxx.xx3
my goal is to have
a running kvm on the host
a secure host ...
5
votes
1answer
461 views
How to prevent IP spoofing using MAC and ebtables?
I am trying to create IP-MAC pairing rules in ebtables. There are few tutorials and related questions [1] available but I have kind of specific setting.
ENVIRONMENT:
I have many physical hosts. Each ...
0
votes
1answer
56 views
Cisco 871 IOS BVI: Distinguishing incoming and outgoing
I understand that a BVI is very much equivalent to a network switch. But it includes the benefit of being able to have an access control list.
I am doing this, but I would like to more effectively ...
