Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [bridge]

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.

1
vote
2answers
13 views

Access another network through a computer that is connected to two networks

I have a 3 windows 7 machines that each have more than one Ethernet port. One of them is one Network A and Network B and the other 2 are only on Network B. Diagram: Network A ...
0
votes
0answers
14 views

VM: Bridged connection won't work [on hold]

I have Debian on VirtualBox running an Apache server and website in NAT mode. Everything is fine except I can only access the website or SSH to the VM from another terminal through 127.0.0.1. I ...
0
votes
0answers
11 views

VM: bridge connection won't work but NAT is okay

I messed my server configuration up when trying to set a port scan protection on my Debian on VirtualBox. I did it while being connected via Bridge and now I have no internet connection anymore. When ...
0
votes
0answers
45 views

Adding a second subnet IP to bridge breaks routing of previous subnet

I have a host machine with Proxmox installed on it, hosting several VMs. The host has a NIC and a bridge, and a subnet of 16 public IPs assigned to the bridge, so that each VM and the host itself gets ...
0
votes
1answer
56 views

Can only access the gateway at the end of my ssh ethernet tunnel why?

I have a remote private network connected to the internet via a Linux gateway. The gateway has the following arrangement: eth0 - external IP br0 - with eth1, and tap0 devices added to the bridge. ...
0
votes
1answer
28 views

Bridge Networking on CentOS brctl error

I am trying to bridge an interface to another one but when I execute ifup br_wan to the interface I get the error message below. It's on CentOS 7 and I have the exact same setup on another box so I'm ...
1
vote
1answer
80 views

Linux bridge broken after upgrade, out of ideas / places to look (now 4.20.0-arch1-1-ARCH) (works in 4.19.13)

UPDATE: After stepping away from the problem for a little bit I realized there was one thing that I could examine or test which I hadn't. Reverting to an older version of Linux allowed me to work-...
1
vote
1answer
27 views

Partially working network bridging - Ping works but services can't connect

So, here's the setup - I have a network with a Xen host on it. The Xen host is configured to bridge between the physical network and hosted VMs. i.e. [Network] <-----> [Xen DomO / Bridge] <----...
0
votes
1answer
41 views

how can I assign a static ip to docker, and use it with docker-compose

I installed docker in a machine running Windows Server 2012, its ip is 192.168.0.70 mask 255.255.255.0, there is no DHCP in the subnet 192.168.0.x; I set bridge connection, but the dhcp present gives ...
-1
votes
1answer
61 views

1 bridge - 1 vNIC - Multi VLAN

I have an issue that I can't resolve since a few weeks... I present to you the configuration for understanding: I have a NAS Qnap that it makes Virtualization (qemy/kvm). The OS of the Qnap is CentOS....
0
votes
0answers
32 views

NIC teaming issue on CentOS7

I have team interface with only one physical NIC em1 attached. Then I try to add another NIC em2 to team with following command: teamdctl team0 port add em2 After adding second NIC team interface ...
0
votes
1answer
44 views

Forwarding and routing issues using linux bridge

I have two containers running (A and B) inside a Virtual Machine (Ubuntu 18.04). For network simulation purposes I am routing packets from A to B (this part works). What I want to do is to allow A and ...
0
votes
0answers
92 views

Netplan bridge issue

I am trying to create a bridge using Netplan. I copied this part of the guide. But it gives me an error: root@ubuntu:~# netplan generate Error in network definition //etc/netplan/01-netcfg.yaml line ...
1
vote
0answers
45 views

Ping devices on local network via PC on Azure VPN

I'm trying to ping a device on a PC's NIC (Ethernet) with a static IP of say 192.168.1.1 (This IP is fixed, it cannot be configured or changed unfortunately) that is connected to an Azure SSTP VPN. I ...
1
vote
2answers
117 views

KVM: Hosts with private and public IPs

We have a small block of static IPs (e.g. 203.0.113.0/29). We currently only use 203.0.113.2 for a mail server. We'd like to add some other public servers, and if possible would like to have them ...
1
vote
0answers
28 views

Linux Security - Systemd-networkd (Clear Linux) - Topolgy of bridge interfaces (br0/br1)

All, Apologies for the rookie questions, but this is my first dive into Linux and systemd, so I'm hoping someone with better knowledge than myself can help here. I have a physical server running ...
0
votes
2answers
168 views

Why does arp_ignore=1 break ARP on POINTOPOINT interfaces? (kvm guest)

If I add the following settings on a kvm guest: net.ipv4.conf.all.arp_ignore=1 Networking of the guest stops (highly intermittent). The kvm host uses bridge-networking: auto lo iface lo inet ...
0
votes
1answer
35 views

Network connectivity interruptions on bridge in case a new device is added or removed

I am currently tracking down a connectivity issues of docker containers on a custom bridge network, which I could reduce to the Linux network stack without docker being involved. The situation that I ...
0
votes
0answers
94 views

Bridge networking in ubuntu guest on freebsd host using vm-bhyve

i'm a little less learned on bridging thus need help in guest networking. I've setup 2 ubuntu guest on a freebsd vm-bhyve. created a single switch public which has 2 tap insterfaces namely tap0 and ...
0
votes
0answers
406 views

Configuring VLANs in Mikrotik RouterBOARD 750 r2

I'm having a hard time trying to configure VLAN tagging in a Mikrotik router. The same has 5 interfaces which I'll describe below: Interface 1 and Interface 2 --> ISPs Interface 3 --> Uplink to a ...
1
vote
0answers
199 views

Route QEMU VM traffic through hosts VPN

tl;dr Host connects via VPN to the internet and a VM on this host doesn't go through this VPN (but it should). I think the network config isn't quite correct. The host The host (arch Linux) connects ...
0
votes
0answers
71 views

Linux: Speeding up traffic destinated to the bridge itself

I am attempting to follow this advice to speed up traffic destinated to the bridge itself. My situation seems to check all the boxes: server also talks to other hosts, bridge ports don't have IP ...
0
votes
2answers
109 views

Adding a bridge kills the internet connection from all interfaces

I'm working on debian stretch with the newest xen from repositories. I've never worked with xen before, so bare with me. I've searched far and wide, and all solutions I apply do not work. Installing ...
0
votes
0answers
41 views

Bridge is loosing packets

I have a Router running OpenWRT 15.04. The Router has a dedicated Wifi Radio, which is internally connected to eth5. I am running 2 Wifi Networks on that Dedicated radio, one is running on vlan 3. So ...
0
votes
1answer
329 views

bridge0: received packet on bond0 with own address as source address

I have created a bond using netplan (ubuntu 18.04) which shows the same MAC address for the two member physical NICs and the bond itself. I configured a bridge on top of that, for use with KVM/Qemu ...
1
vote
1answer
37 views

HP Procurve STP Path Blocking

I have four Switches that are interconnected with each other, witch form a loop as shown in this network diagram The switch 1 is the root bridge and is connected to the primary edge router. The ...
0
votes
1answer
412 views

Setting up pfSense to bridge LAN NICs and connect WAN

I have a machine with four NICs (physical ethernet ports) and I'd like to set up a fully updated pfSense on it. So far it looks like this: A few things I've done so far: I've set up the bridge ("...
0
votes
0answers
58 views

VPN IPSec between Google Cloud and Local Network - Arris Modem

I'm trying to establish a VPN IPSec between my local network and my virtual PCs under Google Cloud Platform. On Google Platform: Private Network: OK External static IP: OK Firewall rules: TCP, UDP, ...
0
votes
1answer
116 views

Openvpn Bridge - can connect but no LAN or WAN

I have had a routed openvpn server running for some time. I am trying to set up a bridged connection so that my vpn will be on the same subnet. I have the following config file for the server. When ...
0
votes
0answers
19 views

bridges make ping stall

I had a problem that after connecting to wi-fi ping shows stalling. You can see here intervals of stable ping: I had from 10 to 20 bridges which was produced by docker, I decided to remove all of ...
0
votes
0answers
17 views

LXC guest connects to network in spite of misconfigured Gateway

I am running an LXC container on Slackware 14.2 host with Slackware 14.2 guest. Here the relevant configurations: Configuration to start the bridge: /sbin/brctl addbr lxcbr0 /sbin/brctl setfd lxcbr0 ...
0
votes
0answers
60 views

KVM guest using network bridge causes packet loss on host

I'm running Gentoo with libvirtd. The host is using a bridge for the guests to attach to. When starting a KVM guest, the host starts experiencing a lot of packet loss. The guest is using virtio for ...
0
votes
0answers
75 views

IPv6 not working with vmbr0

Here are my configs: Host: > ip -6 route show dev vmbr0 2a01:4f8:141:54d8::/64 proto kernel metric 256 pref medium fe80::/64 proto kernel metric 256 pref medium - iface enp30s0 inet6 static ...
0
votes
0answers
37 views

Public IP not resolving

I have a Debian/Proxmox sever running and trying to add a public IP which is not resolving and im trying to figure out if its a config issue or out IT network infrastructure (which we do not manage) ...
0
votes
0answers
2k views

Cannot ioctl TUNSETIFF tap0: Device or resource busy (errno=16)

I'm having this weird issue that when I run bridge-start together with openvpn, the service won't start. If I don't let openvpn run bridge-start, and add the necessary interfaces (tap0, br0) manually (...
0
votes
0answers
99 views

Network data/bandwidth accounting on a VM's network from the host/hypervisor side (libvirt/KVM, bridged networking)

On a server a few KVM/libvirt virtual machines are running. Sometimes these use lots of GB in network bandwidth. I would like to do statistics on network transfers (bandwidth usage, ideally by IP ...
0
votes
0answers
84 views

Two Cisco routers connected through BVI (Bridge Group Virtual Interface)

I have two Cisco 1921 routers which are now connected with VPN Tunnel. Now I want to connect them with a BVI (Bridge Group Virtual Interface). I have a dedicated link from my carrier. My problem is ...
1
vote
1answer
717 views

How to create a non-nat lxd network bridge (using lxd network)?

How to create a non-nat lxd network bridge? I have tried the below network configs, then ran sudo service networking reload and lxc stop and lxc start for the container in question. I was unable to ...
0
votes
1answer
371 views

Linux/Ubuntu bridge causes tcp retransmission and DUP ACK

When I do configure a network bridge on my Ubuntu server I got each packet to be retransmitted and getting many duplicate ACKs... as this wireshark image my bridge interface config is: iface enp5s0 ...
0
votes
0answers
173 views

How to make apache in LXC debian container accessible on QNAP QTS 4.3.4

I recently bought a QNAP TS-431P2, running QTS 4.3.4.0537. I installed Container station and from there the debian-jessie-armhf:latest lxc container. I can access the internet from within the ...
1
vote
0answers
153 views

Network bridge different subnets (Docker / Kubernetes)

I'm a little bit confused with the use of network bridges in docker / k8s setups. My understanding is that a network bridge operates exclusively at layer 2 and is used to combine 2 network segments ...
0
votes
1answer
122 views

2 virtual interfaces on the same vlan

I have one vlan with id 30. The VLAN interface on the host is eno1.30. I need two bridges to access this VLAN. Can I create a new virutal interface on the same VLAN in the same machine and add the ...
1
vote
1answer
120 views

What is the term for assigning multiple IP addresses to single NIC within the same network?

I've been looking for the term used to define the process of assigning multiple IP addresses to single IP address. A similar term that I found so far is Multihoming but, this isn't quite what I'm ...
0
votes
0answers
204 views

How can I forward all ARP requests to bridge interface?

I have debian linux machine directly connected with one NIC to ISP as host with the following interfaces auto eth1 iface eth1 inet manual auto vmbr1 iface vmbr1 inet manual bridge_ports eth1 ...
0
votes
0answers
368 views

QEMU Network bridging for having a public IP

I simply want that my QEMU VMs have a public IP so I can run multiple servers in the same machine. I've read a lot of wikis, guides, tutorials, forum threads and anything related to this but still no ...
0
votes
1answer
69 views

in shorewall, how can I block requests from external hosts when using nested zones?

I have one Debian server with one network interface, I've configured a bridge for KVM and shorewall with two zones in the same interface so I have the "net" zone and the "kvm" for kvm guests, here is ...
1
vote
0answers
503 views

Unable to ping from bridge interface(br0) to another subnet interface IP in Oracle Virtual Box VM

I am newbie to networking and trying to ping from bridge interface to another interface configured with different subnet IP address. I am trying these configuration in oracle virtual BOX VM running ...
0
votes
0answers
24 views

OpenVPN Bridge Comset Modems Setup Advice

I have 2 Comset CM685 modems and would like to setup a VPN between them which will allow both the lans to communicate to each other, i have setup OpenVPN as a bridge, one as a server the other as a ...
1
vote
2answers
48 views

Synchronize states of bridge interfaces

We have redundant 10G fiber links to our upstream internet provider in an active/failover configuration. Between our router and the upstream router, we have a pair of firewalls running Vyos in ...
0
votes
1answer
53 views

Unable to bridge two ethernet interfaces

My /etc/network/interfaces file looks as follows # interfaces(5) file used by ifup(8) and ifdown(8) auto lo iface lo inet loopback auto enp0s3 iface enp0s3 inet dhcp auto enp0s8 iface enp0s8 inet ...