Questions tagged [networking]
Computer networking is the connection two or more computing devices for transmitting and sharing data. The devices use common communication protocols over a physical or wireless connection. Use this tag for questions about managing and using network connectivity on an Ubuntu system.
23,121
questions
0
votes
0
answers
28
views
I got a problem like ERR_ADDRESS_UNREACHABLE on my Ubuntu in all browsers
I can't load www.w3schools.com in all of my browsers in Ubuntu 22.04
I already switched to another router, but it didn't help me.
Also, I have already used this commands:
sudo apt update && ...
- 1
0
votes
0
answers
26
views
permanently setting RX TX Buffer for an interface
I've tried several things and I'm just typing this there so that someone else does not spend as much time as I did on this.
I had success with this:
sudo -i
mkdir /etc/networkd-dispatcher/...
- 1
0
votes
0
answers
12
views
QNAP: Backing up Ubunbu to an internal NAS, Ubuntu on external IP and NAS on internal IP
I have a QNAP NAS which is connected to my internal network on IP 192.168.87.100 and works well for backing up various devices in my home. I have 2 Ubuntu servers which are on external IP.. One ...
- 1
0
votes
0
answers
48
views
Disable IPV6 but your article may need an update for Unbuntu 22x
Your Topics on this are interesting and I've looked at them.
Particularly How to disable IPv6 permanently?
As a newbie, I cannot make a comment, so I am asking a question
I am on Ubuntu 22 and the ...
0
votes
0
answers
16
views
Experiencing delays in network connection execution
Experiencing delays in desktop connection execution.
After each boot it takes considerable time BEFORE
any network access is actually running.
This is NOT a network issue - it goes away after about a ...
0
votes
0
answers
72
views
does 24.04 LTS include support for ethernet over usb
I’m trying to configure a connection between a raspberry pi 4 running ubuntu 24.04 connected to an ipad pro.
It has been known to work in the past but I cannot get it to work with 24.04.
I have not ...
- 9
1
vote
0
answers
85
views
performance issue with rtl8156b-2 USB3 2.5 Gbit adapter
https://www.google.com/search?q=Axagon+USB-A+3.2+Gen1+2.5+Gigabit
https://www.google.com/search?q=rtl8156b-2+ubuntu+24
root@laptop:~# ethtool enxc0eac36156XX|egrep "Speed|Duplex"
Speed: ...
- 31
0
votes
0
answers
320
views
Ubuntu 24.04 LTS VPN Connections in Network Manager
I've done a profile change on my laptop to have domain logins. In doing so, I copied all config files in my home directory to a temp location, and then into the new home directory, obviously doing a ...
0
votes
0
answers
33
views
Use netplan to have a failover wifi interface between two wifi adapters
I have two wifi adapters on my devices, one built in and the other requiring drivers.
I use unattended upgrades and have been having issues when a kernel upgrade happens the drivers for the device ...
0
votes
0
answers
21
views
The cable connected to the second ONLY works if the cable from the first is connected
I'm using fiber optics for intranet, but there's one thing I don't understand yet... I tested it on a network card with two interfaces, but the cable connected to the second ONLY works if the cable ...
- 105
0
votes
0
answers
53
views
Netplan with source-based routing for multiple NICs and Gateways
I want to configure an Ubuntu VM with multiple NICs and Gateways:
ens18: 192.168.10.0/24
ens19: 192.168.20.0/24
ens20: 192.168.30.0/24
In the best case, the IPs should be provided by my DHCP server.
...
- 1
0
votes
0
answers
15
views
Shared connection unable to block ports
I am in need to test our connectivity of our device (specifically, how our device responds when unable to reach certain ports).
So I am trying to control the ports, by sharing the internet connection ...
- 161
0
votes
0
answers
34
views
"activation of network connection failed" error for VPN on Ubuntu 20.04
I tried to connect to the VPN and this error appeared:
activation of network connection failed
I found it strange, because until 5 days ago it was working normally.
Does anyone know how to solve it?
- 11
0
votes
1
answer
31
views
Firewall ufw to deny port visibility
How can I block ports from being visible/accessible from the outside using ufw?
If I nmap my server I can see all my running Docker containers (all ports from 8080 to 8086), which I do not want, ...
- 2,513
0
votes
0
answers
36
views
add ipv6 address in /etc/network/interfaces
I'm trying to add IPv6 static address to my config, with instruction from provider, but this didn't work. ping doesn't respond.
What am I doing wrong?
Ubuntu 22.04
IPv6 Adress data:
address 2A03:4900:...
0
votes
0
answers
29
views
ME906s LTE M.2 Module auto disconnect under Ubuntu 22.04
I have a ME906s LTE module connected through USB. The module works alright with Ubuntu 20.04.
But with 22.04 the LTE module instantly disconnects itself. The 22.04 is a fresh install, server version, ...
0
votes
0
answers
42
views
disabling resolv.conf for Samba installation
Hi I would like to configure an Ubuntu server 24.04 as an AD Domain Controller using Samba.
Reading the Samba Wiki, I find that one of the prerequisites is to disable the automatic update of /etc/...
- 11
0
votes
0
answers
58
views
Cannot start Ubuntu on WSL2
have a W10 device in test environment with clean WSL2 install, no distros. Installed Ubuntu. When attempting to launch I receive the error:
WslRegisterDistribution failed with error: 0x80072749
Error: ...
- 11
1
vote
0
answers
28
views
CUPS printing server issue (with HP DeskJet 1050A)
I want to make my HP DeskJet 1050A printer accessible on my home network.
I installed CUPS on my Ubuntu server, added a printer, which is connected to a USB port on my server (an old laptop), with a &...
- 11
0
votes
0
answers
30
views
Network Device error in Ubuntu 22.04 LTS (WSL2) when doing network setup with Powerscript
My company provides some network tweaking scripts to update the WSL network stack to work together with our internal network / corporate proxy / etc.
The part of the powerscript which is problematic ...
0
votes
0
answers
88
views
Unable to Connect to Internet After Upgrading to Ubuntu 22.04.4
On Thursday, My OS updated to 22.04.4, and the nightmare began.
Everything worked fine until Friday morning when even the network settings on my PC disappeared. I received the "NetworkManager not ...
- 1
0
votes
1
answer
41
views
Connecting a domain to a VPS
I'm having trouble connecting a domain to my VPS. Maybe I will describe step by step what I did and someone will be able to give me an answer. I bought a VPS on ovhcloud. I installed Ubuntu on it. ...
0
votes
0
answers
48
views
Wired internet suddenly extremely slow
I've been complaining for some time on slow response from browsers and other things connected, but never suspected connection speed. Finally checked it and it turned up 1-5 Mbit/s. On all other ...
- 1
0
votes
0
answers
48
views
In Ubuntu 22.04 | Kubernetes Connection Refused
kubectl get pods -o wide | kubectl get nodes
Error from server (Timeout): the server was unable to return a response in the time allotted, but may still be processing the request (get pods)
API Server
...
0
votes
0
answers
84
views
Ubuntu server: Systemd-networkd-wait-online.sercice failed during startup and Invalid login bug
Ubuntu server 24.04 was working correctly for a few hours after install. After I rebooted it, there were two errors:
Systemd-networkd-wait-online.service failed every time on boot. I was also not ...
0
votes
0
answers
34
views
Can't Access Ubuntu Remotely Using VPN
I recently lost the ability to remotely access my homelab running Ubuntu 22.04.4 LTS using a VPN (Wireguard). I'm not aware of any direct changes that would have caused this.
When I am on my home ...
0
votes
1
answer
188
views
Accessing LAN with NordVPN active
This used to work, but for some reason no longer does. NordVPN support had no idea. Have spent all day researching and getting nowhere.
Problem summary: I can't ping other Ubuntu boxes on my network ...
- 187
0
votes
0
answers
77
views
How do I configure VLANs in netplan .yaml?
I have never worked with Linux before and am trying to config a virtual appliance for SNMP scanning of VLANs. I am working on editing in VLANs to my installer-config.yaml file. The primary NIC is ...
0
votes
0
answers
21
views
Route between two network interfaces (one with VPN, the other one served DHCP addresses)
I tried to find an answer to my question, but I've not found anything...If this has been asked and answered I'll be happy with a pointer.
I have a server running Ubuntu 23.10 with two network ...
- 1
0
votes
0
answers
17
views
Epoptes troubleshooting
This error on image occurs when trying to import key authentication in epoptes client.
Firewall is inactive in both PCs and the recommended port is open. Server epoptes is msi and both PCs are ...
0
votes
1
answer
77
views
Cant connect to local ubuntu server with ping or ssh, server can ping internet n router
Installed ubuntu server and openssh on old laptop installation went well. Settings good, all firewalls down, ssh active BUT still no machine can ping server n server can ping machines. Tried pinging ...
0
votes
0
answers
107
views
Setting Up Ubuntu Headless Server for Homelab – Need Some Guidance
Hello everyone,
I'm fairly new to Ubuntu and currently setting up a homelab. I've installed Ubuntu Server (headless) on my main machine, and while I can log in through the terminal, I'm feeling a bit ...
0
votes
1
answer
93
views
Struggling to get wifi driver to work on asus ws wrx80e sage se wifi
I installed a fresh copy of Ubuntu 24.04 and am unable to get the Wifi driver to work. It worked once (in recovery mode) and I don't seem to be able to do that anymore.
Here is the output of lspci -...
0
votes
1
answer
68
views
Disabling USB ethernet [duplicate]
I have a machine attached via USB-c and HD Port to a Dell monitor. This monitor is rather a nice one that allows for some KVM type functionality for machines attached to it. In that vain, it includes ...
- 109
2
votes
0
answers
1k
views
Cannot connect to vpn after upgrading to Ubuntu 24.04
I have not managed to get VPN working since upgrading from Ubuntu 22.04 to Ubuntu 24.04. All the algorithms set and IPsec tunnel to L2TP host enabled. PAP as authentication methods selected. ...
- 21
1
vote
0
answers
396
views
How do I find missing Wifi in 22.04 and 24.04 LTS?
I created a bootable USB stick and used it to install Ubuntu on a Windows 10 HP notebook in dual-boot mode. The machine worked well for several years but developed hard drive problems recently.
Hence, ...
- 11
0
votes
1
answer
71
views
Multiple network interfaces, one for host and others for segmenting containers/VMs. Can't get container to resolve outside FQDNs
Trying to enable multiple interfaces on my Ubuntu 24.04 server. I would like to isolate certain containers to certain VLANS. LAN & VLANS managed by pfsense.
Network Map
I am using netplan on the ...
- 1
1
vote
0
answers
236
views
Ubuntu 24.04 server with NetworkManager does not configure eth0
I installed 24.04 server on a Raspberry Pi 4. The initial boot recognizes eth0. After I installed NetworkManager, I created a netplan configuration for eth0, wlan0, and wlan1. Upon reboot, eth0 was ...
- 11
0
votes
1
answer
731
views
Ubuntu 24.04 LTS network bridge
I got some problem when bridging in Ubuntu 24.04 LTS.
When I use this config:
network:
version: 2
renderer: networkd
ethernets:
eth0:
dhcp4: true
eth1:
...
- 101
0
votes
0
answers
35
views
Connecting to a public network does not work on Ubuntu 24.04 LTS
How do I connect to a public network with Ubuntu 24.04 LTS?
Under 22.04 LTS, immediately after connecting to the public network, a window opened in which I had to confirm the connection. Then I was ...
0
votes
1
answer
315
views
Slow speed Ethernet issue on Ubuntu 24.04
I recently changed my system to Ubuntu from Windows and I use my mobile and USB ethernet to connect, I used to get 500+ mbps on Windows by using USB tethering, but on Ubuntu 24.04 I am getting only 4 ...
- 1
1
vote
0
answers
1k
views
Ubuntu 24.04 DNS resolution for local machines
I am looking for installing Ubuntu 24.04 Desktop machines in order to run a MySQL server. When installing with the graphical UI, there is an option to join Active Directory, which I wanted to do. ...
1
vote
1
answer
49
views
Change network interface back to old naming convention - eth0
I am running docker-desktop and using docker compose for containers. I cannot create a ipvlan using the interface name enp2s0 docker compose expects eth0. How can I revert and persist the old naming ...
- 11
2
votes
0
answers
679
views
WiFi connection issue in Ubuntu 24
I quickly downloaded and started installing Ubuntu 24 on the day of its release. However, I encountered errors during the installation process, causing it to stop and restart multiple times. I ...
- 21
0
votes
0
answers
44
views
Lenovo T410 - wifi driver not working
I installed ubuntu 22.04.3 to my old Lenovo ThinkPad T410 and wifi isn't working. I reinstalled OS few times... it worked on server release and when i installed this one again it hasn't been working ...
0
votes
0
answers
23
views
ThinkPad X1 Extreme Gen 1, Ubuntu 23.10 networks show question marks
I have just updated to 23.10 from 22.04.
Wifi connects to my network, but shows question mark icon and no internet connection
The same story with both Ethernet and network through Bluetooth.
nmcli ...
- 1
0
votes
0
answers
33
views
iptable-save command not showing any output
When i run iptables-save command on Ubuntu Ubuntu 22.04.3 LTS and Ubuntu 20.04.4 LTS it not showing default firewall chain rules when i run this other linux example centos or redhat i am able to see ...
0
votes
0
answers
53
views
Ubuntu 22.04 Network Problem
I am using Ubuntu 22.04, but I am having problems with the internet. At first, I can use the internet easily, but sometimes the internet becomes unusable and I can fix it by turning the computer's ...
- 1
-1
votes
2
answers
4k
views
Issue with Wireless Network Connection on Ubuntu 24.04 LTS
Hello Ubuntu community,
I installed Ubuntu 24.04 LTS onto a USB drive using an MSI machine. However, I'm encountering difficulties with connecting to the wireless network. Ubuntu doesn't recognize any ...
- 1
-1
votes
1
answer
714
views
USB Ethernet and normal ethernet is not working on ubuntu desktop 24.04
I previously had problems with normal ethernet on the laptop that im currently using and i assumed it was the hardware fault so i ordered a new adapter(that works on other devices) and tried using it ...
