Questions tagged [network-bridge]
Questions about configuring and using bridging interfaces
387
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Issue with bridge br0 DNS when I change the nameserver address 20.04
So basically I have an issue when I change my bridge br0 namerserver from 192.168.50.1 which points to a pfSense router, to my PiHole ad blocker. All clients get dhcp from the PiHole and are working ...
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481
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other interface connected to linux bridge not receiving multicast packet
lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 20.04.3 LTS
Release: 20.04
Codename: focal
Bridge Info
sudo brctl show
bridge name bridge id ...
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1
answer
323
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How to reset/reinitilize Ubuntu bridge
I have workable Bridge in Ubuntu 21.10 used by VM
This is definition of my Bridge.
#cat /etc/netplan/01-netcfg.yaml
network:
version: 2
renderer: networkd
ethernets:
enp4s0:
...
- 205
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1
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72
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problem on ubuntu bridges installation
I'm following the instructions, but it is not working.
Here is my original 00-installer-config.yaml file:
# This is the network config written by 'subiquity'
network:
ethernets:
enp2s0:
...
-1
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2
answers
3k
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Ubuntu 20.04: when adding bridge via netplan, bridged interface remains routable, routing entries duplicated
OS: Ubuntu 20.04.3, all the latest updates installed.
I am trying to create a bridge interface, to enslave current (eno1)
Netplan configuration:
# This is the network config written by 'subiquity'
...
0
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1
answer
4k
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How to connect Ubuntu 21.10 to tagged VLAN (netplan)
I have network
VLAN: 4005
MTU: 1400
Subnet: 157.XX.XX.64/27
Gateway: 157.XX.XX.65
Netmask: 255.255.255.224
Broadcast: 157.XX.XX.95
I want to configure netplan Ubuntu 21.10 to IP 157....
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1
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Can a slave interface have an IP address?
I created a bridge and assigned a physical interface to it as a slave. Now both have the same MAC and IP addresses. I thought only the master would have an IP address. Is something wrong ?
2: enp1s0: ...
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-1
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1
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512
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Zerotier and printer
I have a private Zerotier SD-WAN (10.99.99.0/24). Some of my clients also use a local net 192.168.0.0/24. And there is also a network printer with 192.168.0.101.
Since Zerotier does not have a client ...
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333
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Ubuntu 20.04 - Bridge KVM
I am using Ubuntu 20.04.3 and libvirt for virtualization. The default bridge works well with NAT and I am able to establish internet connections.
With a bridge to have a VM on the same network, I ...
1
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1
answer
699
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Is it possible to share a wifi connection through ethernet while keeping the same DHCP server?
I need to add a Jetson Nano to a robot and I'd like to use a single wifi interface to communicate outside of the robot.
My network setup should look like this:
Server <--eth--> Router <--wlan-...
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2
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0
answers
791
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Enable BRIDGE network for Virt Manager in Ubuntu 21.04 with a Wireless Network only
I've been using Boxes without any problem, the only missing functionality is to access the network outside the guest environment (Boxes Sandbox), from/to another computer in the same LAN.
Because ...
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1
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0
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243
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Bridging Thunderbolt Ethernet Connections
Can Ubuntu bridge ethernet (thunderbolt networking) connections/adapters? The goal is to bridge two hosts each with a thunderbolt adapter; when you have one host, and you connect to host 2 and host 3 ...
- 31
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1
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835
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Bridge network suddenly stopped working (18.04)
My Desktop is getting weird. I have Ubuntu 18.04 with a bridge set up (for my gaming VM) and until yesterday all worked fine. Booted up today, no network connectivity. I have no idea where the issue ...
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1
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What's the proper command that generates a specific route that I should add to ubuntu?
I'm trying to understand why there aren't any linux vm that can connect to internet if emulated with bhyve (it's level 2 hypervisor which run on freebsd 13). Instead,if I use vm-bhyve (a wrapper for ...
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3
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1
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11k
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How to enable Promiscuous Mode permanently on a NIC managed by NetworkManager?
I'm trying to bridge two of several NICs to act like a switching hub.
To do so, need to enable the promiscuous mode on the NICs.
Even if I set it to “promisc on” with the “ip link” command, the ...
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1
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409
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Multiple virtual network interfaces with own public IPs
I'm currently trying to set my server/old computer up, to run multiple different services, each with a different Network interface, so I can forward them to different DynDNS's via DDclient. However, ...
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1
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0
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157
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Problem Setting Up a Network Bridge for OpenVPN Server
I've installed bridge-utils and have followed several articles for creating DHCP to my LAN with OpenVPN. It appears that I have bridge set up correctly but when I start OpenVPN server I get this ...
- 131
2
votes
1
answer
414
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LXD Bridge Prevents Network Access
Explanation before the question
I am trying to configure LXD on a raspberry pi using Ubuntu Core 20.04. It's local IP is initialized as 192.168.2.64. Before I run lxd init it was connecting to network ...
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2
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0
answers
110
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Bridged KVM guest crashes other guests on Ubuntu Desktop 20.04
I am new to Ubuntu, but am running Desktop 20.04. I have installed KVM and configured bridged networking per the following two links based on my understanding that the legacy networking service has ...
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2
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1k
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dhcp fails on br0, new configuration
I am trying to create a bridge for xen virtual devices to connect to.
The br0 appears to be up but it will not pull an IP and the ipv6 link local on the br0 cannot be reached either
root@Inspiron15:/...
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0
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101
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Wifi + Wired Hot-spot possible?
Running Ubuntu 20.04. I want to setup a wifi hot-spot which distributes IPs by dhcp. Furthermore I want to connect to this 'hot-spot' by wired ethernet connection. So the wired connection shall be in ...
- 111
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2
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3k
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Is there a way to create an Open vSwitch internal port with netplan?
As per the Title really. I can't work out if there's a way to do this or not. The only mention of ports in the docs are "patch ports" as pairs of ports. The example shows the use of these ...
- 412
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1
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243
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Isolate hosts on Netplan defined Bridged network
I've Ubuntu 20.04 LTS for Raspberry PI and I've created a wireless access point using the snapon wifi-ap package. That allows hosts to attach to a 192.168.8 network and works beautifully the Ubuntu ...
- 1,345
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1
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1k
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Ubuntu 20.04 WiFi access point without subnet/DHCP server
I have Mac Mini with Ubuntu 20.04 server installed (so no GUI).
And want to use it as a WiFi access point, without NAT/DHCP server (so, given that main Mikrotik router is 192.168.88.1, both Mac Mini ...
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0
answers
29
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Unable to enable SRIOV for a Ethernet port [duplicate]
I get a permission denied error when I run the command
sudo echo '7' > /sys/class/net/eno99/device/sriov_numfs
This is the error:
bash: /sys/class/net/eno99/device/sriov_numfs: Permission denied
...
- 13
1
vote
0
answers
873
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Netplan bridge master getting a static IP address instead of the bridge
I am trying to configure a bridge for KVM guests and host connectivity. The bridge is never configured right, the physical NIC always ends up getting the static IP address and the bridge is assigned a ...
- 11
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1
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1k
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Ubuntu Server 20.04 LTS not reachable
my Ubuntu 20.04 LTS server looses its inbound LAN connection after some days of operation. The outbound connection works: I receive status e-Mails from that host. Bridged containers work as they ...
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1
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274
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do 20.04 bridges work? what's amis with mine? do i need a special kernel?
Trying to setup a bridge for libvirt using 20.04 netplan. Network is fine before trying to define a bridge, but doesn't come up with my bridge definition. What am i missing?
Do i need a special kernel?...
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1
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1
answer
144
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Using Ubuntu as router for CCTV
I set an system in my house and I have some issues.
I am using CCTV in my house, the DVR is located far from my internet for plug it by cord, so I toke an unused Raspberry pi 3 that I had and set him ...
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0
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1
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1k
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Ubuntu 20.4 KVM bridged network now working on guest
I am in the process of migrating a machine from Debian to Ubuntu 20.4.
Everything seems to be working fine other than I am unable to get KVM VM's to connect directly to the network. Switching to 'NAT' ...
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1
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1
answer
2k
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hostapd vs netplan: wlan0 not added to bridge at boot
Like many people, I'm using a Raspberry Pi 4B running Ubuntu 20.10 arm64 as a LAN/wifi bridge, using hostapd and netplan. Everything works fine except that the bridge is not configured correctly when ...
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1
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Ubuntu 20.04 - Wake on lan does not work on a bridged interface
I am using Ubuntu 20.04 Server. Using a basic DHCP setup, I was able to use WOL with no issues. I had to build a service to ensure ethtool -s enp1s0 g stuck after a reboot. WOL worked great.
Now I ...
0
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1
answer
365
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Transfer files via USB 3 bridge
I want to transfer files between 2 machines that run both Ubuntu 20.04. I have an ethernet connection via cross-over patch using samba, but the speeds are horrible. I want to test a USB connection ...
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1
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2k
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KVM Bridge on Ubuntu 20.04 on Raspberry Pi 4
I cannot get networking inside a guest VM to work with KVM on a Raspberry Pi 4 8GB running the official Ubuntu 20.04 image. I have my networking configured correctly, as far as I can tell. And I'm ...
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0
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1
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481
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What do these iptable rules mean?
These:
sudo iptables -t nat -A POSTROUTING -o tun0 -j MASQUERADE
sudo iptables -A FORWARD -i tun0 -o wlan0 -m state --state RELATED,ESTABLISHED -j ACCEPT
sudo iptables -A FORWARD -i wlan0 -o tun0 -j ...
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1
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1
answer
6k
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Ubuntu 20.04 KVM, netplan with bonding, vlan and bridges
I am preparing migration of an UBUNTU 16.04.7 server with 5 NIC's to 20.04.
My testing server has 4 NIC's: 2 onboard and 2 as Intel Pro NIC. Configured in 00-installer-config.yaml. The first NIC is ...
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1
vote
1
answer
2k
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Netplan with bonded NICs and VLANS and bridges not working
I have a netplan issue. Config is below. Bond seems to be working but I cannot connect to the network VLAN128 (br128) which is bridged on bond. The hardware and bonds worked before the server upgrade ...
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1
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1
answer
2k
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LXD - Assign public IP to a container
I have several static public IP addresses on my host machine. I want to assign that IP to a certain container, but I cannot really find any updated info about that. I tried to create a new network, ...
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0
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1
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876
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Ubuntu as a Router
I am working on a project that uses a computer with a touch screen. This computer has 2 Ethernet ports.
Because of licensing problems, we need to use Ubuntu. The HMI program we created with Java ...
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1
answer
15k
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Netplan inconsistent indentation Ubuntu 20.04 server
I am having an inconsistent indentation problem in a netplan configuration. I would like, if possible, someone to explain to me where I'm going wrong.
Thank you.
The error is:
/etc/netplan/50-cloud-...
6
votes
1
answer
54k
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Looking for /etc/network/interfaces is missing?
So I have a newly installed ubuntu machine. I was going to enter some network setup, but this file is missing: /etc/network/interfaces. I also checked with root. There is a local loopback on the ...
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1
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3k
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No internet connection on host when Ethernet is Bridge for Guest VM (Ubuntu 20.04)
I setup a bridged connection modifying the netplan file in /etc/netplan/ and setup the bridge device using nmcli. Below is my netplan file:
# Let NetworkManager manage all devices on this system
...
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0
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417
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How to connect Ubuntu 20.04 server to internet through a windows 10 laptop with wifi connectivity
I have recently installed Ubuntu 20.04 server on DL360 G8. My installation place does not have internet. I can only access internet through my mobile data where also my laptop is hot spotting.
I ...
4
votes
1
answer
12k
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Ubuntu 18.04 netplan create bridge from wifi to ethernet
I am running ubuntu 18.04 and do not have much experience with networking. This ubuntu server runs on our robot and is supposed to act as a wireless to lan bridge for the rest of the wired modules on ...
- 71
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0
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826
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netplan bridge cannot ping local network devices
I know there are a lot of problems like mine in here, but I still cannot solve my problem.
I updated my Ubuntu from 18.04 to 20.04 and wanted to start using netplan. Unfortunately I'm not able to ping ...
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3
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0
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1k
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How to enable Networking inside a `systemd-nspawn` container?
How can I get networking to work inside a systemd-nspawn container in Ubuntu 20.04? I want the container to get an IP address from local DHCP server, perform DNS lookups using my configured name ...
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0
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1k
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Problem to setup network-bridge with netplan under Ubuntu 18.04 dedicatet server
I need some help with an server, netplan and a network-bridge..
I want do setup an kvm under my ubuntu 18.04 server, who is reachable from outside. So i need a network-bridge.
So i have simulated the ...
- 125
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0
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896
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Trouble with Ubuntu 18.04 netplan bridge on hetzner server
i need some help with an hetzner server, netplan and a network-bridge..
I want do setup an kvm under my ubuntu 18.04 hetzner server, who is reachable from outside. So i need a network-bridge.
So i ...
- 125
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0
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2k
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Network Problems after creating network bridge
i wanted to install some virtual machines on my server using KVM so for this purpose i created a network bridge. so far so good...
My OS is Ubuntu 20.04.
I change the 01-netcfg.yaml file in /etc/...
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2
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0
answers
138
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Using 2 wifi adapters to create a hotspot
I'm trying to create a wifi hotspot with an external wifi apdater. What I have is an onboard wifi (wlan0) that is connected to the internet and an external one (wlan1). What I'm trying to do is bridge?...
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