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.
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Cannot resolve local hostnames in Ubuntu Server 22.04
I can't resolve local hostnames while remote ones work...
ping unifi
ping: unifi: Temporary failure in name resolution
...
ping google.de
PING google.de (142.250.185.195) 56(84) bytes of data.
64 ...
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53
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Download speed on Firefox very slow
I am running Ubuntu 22.04.3 LTS on a Lenovo X1 ThinkPad.
I have a 16Mbit/s DSL connection and am behind a Vodafone EasyBox.
Since a while, Firefox is quite slow and I realized that a Speedcheck from ...
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Cannot SSH to my server, systetmd-login fails
I cannot SSH on my remote server (Ubuntu 22). When I try, it loads indefinitely. Here is the ouptut of a ssh -v:
Authenticated to x.x.x.x ([x.x.x.x]:22) using "password".
debug1: channel 0: ...
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'Connection refused lost connection' error while using scp command
I tried to transfer a file from an HPC system to a remote system using the following command line:
scp /ANKAN/data/abc.pdf [email protected]:/data/ANKAN
But I am getting the following error:
...
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2k
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Where's NetworkManager in ubuntu 24.04?
The NetworkManager service is absent from my ubuntu server 24.04. I still get internet connections, but I can't manage them through systemd like before.
Is it really a bug, or is it by design, in ...
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105
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How to create a bridge interface using cloned MAC address from ethernet?
EDIT: this is probably a user-error
Strangely, after I setup my OPNsense, and IP's DHCP reservation on my PC, the issue hasn't cropped up since.
While I was testing out the VLAN's by creating tagged ...
- 701
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331
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Raspberry Pi 4 Ubuntu Server 24.04 Wifi Not Working
I previously had 22.04 installed on a raspberry pi 4, ran through release upgrades to get to 24.04 and wifi stopped working. Wiped and used rpi imager for a clean install and wifi still doesn't work.
...
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Ethernet Disabled after software update reboot 5/4/2024 22.04.4 LTS -solved but WHY?
Symptoms: No Internet, Networking Icon at the top is gone, the settings gui shows no interfaces. ifconfig by itself shows the loopback interface and nothing else, but an ifconfig -a shows any and all ...
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Wireguard - Same IP Range On Local and Remote - Can't talk
I need some help.
I have a stange wireguard issue.
I subnetted out a /24 into multiple /29 locally. (Announced as a /24 over bird2 to other bgp peers, only subnetted locally on server).
Locally ...
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41
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Cannot connect on port, but can ping
I am running an nginx server on docker in my Windows host using the command docker run --rm --name nginx -d -p 8080:80 nginx
I am connected to a VirtualBox Ubuntu DHCP server using a bridged adapter.
...
- 21
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27
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How can i bridge eth interfaces with no bridge (let me explain)
I have a device that has 3 ETH interfaces.
This way I installed the Ubuntu server on it to use the Pi-Hole application
I want to use my ETH0 to receive the Wan cable from my internet provider moden ...
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26
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Wi-Fi randomly stopped working - network UNCLAIMED
Out of the blue earlier today my Wi-Fi stopped working, no warning whatsoever, (not even after a restart I don't think.) Anyways, the title says it all, lshw -C network outputs:
*-network UNCLAIMED ...
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34
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wifi driver related issue
image of problem
from the above image you can clearly see the problem it says you are using an alternative driver
note: i also switched that toggle of wifi but nothing happen and issue is still same
i ...
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2
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197
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L2TP IPSEC not working after upgrade from Ubuntu 20 to 22
I had configured on Ubuntu20 which was working fine. Recently I upgraded the system to Ubuntu 22.04 but now I am unable to connect to the office vpn.
I am attaching the logs
journalctl -xe
May 03 12:...
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1
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59
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WiFi disconnect-reconnect loop when using NetworkManager
It's as the title says, when I use the desktop GUI tool to connect to WiFi, I end up with my WiFi disconnecting and reconnecting every couple of minutes.
Here's part of the output from the syslog via ...
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31
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wlan0 won't establish connection after MAC change UBUNTU Touch
I am trying to change the MAC address of my wlan0 device, I tried with ifconfig wlan0 hw ether. I tried also macchanger, but after I changed it WiFi won't establish a connection. It sees the WiFi ...
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Bluetooth reverse tither -> local services -> NAP settings -> apply button greyed out problem
I want to set up Bluetooth on my Ubuntu computer to share its internet connection to my mobile device. (Which is the reverse direction of the usual tethering).
So, from the Blueman icon (I'm using ...
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Network problems OOTB Ubuntu 24.04
is anyone else experiencing network problems when trying to install Ubuntu 24.04?
I've worked with Ubuntu in the past on an old Dell computer. My daily runs Windows and I wanted to switch over to ...
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Nic with 4 ports. Netplan setup?
Summary of the Problem
Summary of the problem:
Ethernet into the apartment. I receive 4 public IPs from the ISP.
Ethernet into the switch, four cables out of the switch.
From the switch, cables go:
...
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43
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Intel Wi-fi Adaptor intermittently becomes very slow and/or disconnects
MSI Raider GE76 12UE
Intel Corporation Alder Lake-P PCH CNVi WiFi (rev 01)
Ubuntu 22.04.4
I'm experiencing frequent issues with my wi-fi that causes my internet to become very slow/it disconnects ...
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Given MAC address, how to tell if interface is wifi
Is there a way, on the command line, given a MAC address of a local network interface on the current machine (e.g. 01:23:45:67:89:ab), to determine if that interface is WiFi vs wired?
I'm trying to do ...
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WiFi disappeared after upgrade from ubuntu 20.04 LTS to 24.04 LTS
I recently updated my dell xps 9310 from the dell's official release (20.04 LTS) to the newest 24.04 LTS, but after the upgrade the WiFi, bluetooth and sound features disappeared. In particular:
WiFi ...
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How do I install the driver for the CF-WU710N V5 WiFi adapter on my latest version of Ubuntu?
How do I install the driver for the CF-WU710N V5 WiFi adapter on my latest version of Ubuntu? I'm seeking guidance on setting up the driver for this specific adapter model in the most recent version ...
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121
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OpenVPN Access Server Stuck on License Agreement
I followed the steps from the OpenVPN Access Server Portal to install OpenVPN Access Server on an Ubuntu Server 22 headless VM. After installing and automatically configuring the service, I went to ...
- 101
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246
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IpVanish VPN failed to connect
I am trying to install IpVanish on Ubuntu 23.10, but I get connection failure every time, the activation of the network connection has failed
VPN settings:
IPV6 settings:
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3 modules of my laptop are hard blocked what do i do to unblock them?
Dell-wifi: Wireless LAN
Soft blocked: no
Hard blocked: yes
Dell-bluetooth: bluetooth
Soft blocked: no
Hard blocked: yes
Dell-wwan: Wireless WAN
...
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1
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75
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Disabling Power Saving Modes on Mellanox BlueField DPU
I'm currently working with a Mellanox BlueField DPU and I'm facing some challenges regarding the power saving features that seem to be affecting the network performance.
I have used ethtool to explore ...
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1
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if-up.d files does not have effect on ubuntu 24.04 LTS
EDIT: Ubuntu bug posted here
some time ago I wrote a detailed answer to fix an error for lowering MTU size for a cisco compatible VPN.
After upgrading to Ubuntu 24.04 LTS, I'm unable with the same ...
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UFW to restrict access on second NIC
I am running a cloud based Ubuntu 22.04 server with a public and with another non routable IP address (DigitalOcean)
I am trying to limit access to the second IP address for a Tinc VPN which uses port ...
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1
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228
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Can't connect to internet via ethernet after upgrade to 24.04 (but can connect via wifi)
Upgraded my laptop to 24.04 today. I notice that if I have the laptop connected to ethernet with wifi turned off I can't get out to the internet. I am able to connect other machines on my internal ...
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How can I set VLAN settings to persist across boots?
I originally asked this question on the Unix & Linux board, but I guess it's more appropriate to ask it here.
I have an Ubuntu Server 23.10 which is located on VLAN 2 (IP: 192.168.2.100) and I ...
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Openvpn service running, not connecting to tunnel after changing iptables
I'm trying to make a kill switch for my pi to only allow traffic through the VPN. I made the changes below to iptables and disabled IPv6 in sysctl.conf. This is not my area of expertise so I'm hoping ...
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321
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How do I configure the network manager to use a custom PAC file?
Disclaimer: I don't have much proxy experience, so I may be missing something obvious. I have tried to do my due diligence before asking.
Short Version - Basic Question
I'm having an issue specifying ...
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Dual nic server with open client http port unreachable
I am setting up a poe switch connected to my ubuntu server 20.04. I am running an amd 5700 with some generic parts in a minipc that is being used as an nvr. I have a internet facing nic, eno1, where ...
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132
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Netplan doesn't set static IP after upgrade 20.04 -> 22.04
I'm trying to set the static IP of a network interface on a server that has just upgraded its distro from 20.04 to 22.04. Here is the netplan /etc/netplan/80_netplan_netcfg.yaml.
network:
version: 2
...
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2
answers
834
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failing pxeboot install for 24.04 Server LTS
I'm trying to set up a pxeboot installer for 24.04 Server LTS. The machine finds our PXE and TFTP just fine, and loads the kernel and initrd. But when it gets to the install, it fails to recognize ...
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2
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494
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Snap apps not connecting to internet
I just upgraded my desktop from Ubuntu 22.04 to 24.04. Many apps are now in the snap store. In particular Firefox, Opera, Chromium and Thunderbird. When I launch these apps none are able to connect to ...
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1Gbe Interface stops working when MTU set to 9100 on 100G interface
I have a server with 2x1gbe ports LOM and a single port 100G nic.
Our 1gbe network is different than our 100G network and both have access to the internet. I would like to be able to use both ...
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1
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534
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How to install a certificate on XRDP installed on Ubuntu 22.04
I am setting up RDP connection in Ubuntu and trying to access it from another machine Windows,via Microsoft's Remote Desktop Connection. The setup is fine and works properly with username and password....
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Linux devices can ping ip address but not hostname in local network
I have a network that contains two Linux devices, a router, and a Windows machine. The Linux machines can ping each other using IP addresses and are able to resolve domain names like www.google.com, ...
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Wi-Fi not working on Xubuntu 23.10 live CD
I booted Xubuntu 23.10 on my iMac (27-inch, Mid 2011) using the "Windows" option. However, after the boot process is complete, I don't see an option for Wi-Fi. I tried going to the advanced ...
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46
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Ubuntu boots to tty with no network and no Desktop GUI
Ubuntu 20.04.
I was trying to upgrade python 3.8 and did a bunch of apt-get update/upgrade followed by commands to try to finally remove python. While still in the Desktop GUI I noticed the terminal ...
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Sharing personal files asks password for user "Please login as the user guest"
I think I successfully enabled personal file sharing over LAN on machine A according to official documentation (22.04 LTS). I also set a password for the share. That share appears on machine B. But ...
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53
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Bluetooth Drivers
I dont know much about Bluetooth drivers in Ubuntu (im using Ubuntu 22.04.4 LTS), but my desktop has a TP-Link Archer TX20E V2 and its always failing and i have to reinstall the rtw89 drivers that i ...
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OpenVpn configuration problem - how to access to vpn client subnet on vpn server
I have a problem with configuring OpenVpn connection. I want to configure a virtual machine to have something like hub of other vpn's. On virtual machine (lubuntu) I have a few OpenVpn clients and it ...
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Can I use wifi and ethernet at the same time?
I am planning to build an AirPlay receiver with Ubuntu.
The network configuration in my house is a bit complicated. My home network is in a "Double NAT" state, so other smartphones inside ...
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Unable to connect using openvpn in ubuntu 23.10 desktop
websites are not loading if I enable my OpenVPN in Ubuntu 23.10. syslog entries are not showing any errors.
Exact versions of ubuntu and OpenVPN have been given below
DISTRIB_DESCRIPTION="Ubuntu ...
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50
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Ubuntu Server 22.04.4 LTS cannot be pinged by computer on network without the Ubuntu server pinging the other computer first
this is a new install on a physical Dell R430 server - not a virtual server.
I change the ip address on Ubuntu to a static ip address and reboot Ubuntu server.
I cannot ping the static ip address of ...
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Wifi's connected, no internet access in Ubuntu Budgie 22.04LTS [duplicate]
so i use a macbook(2007) and i've installed the ubuntu budgie 22.04LTS. i can connect to the wifi using ethernet and it works fine but it doesnt do so wirelessly. please help. my machine uses "...
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Wifi stop working - Chipset Reset Failed
Sometimes, my computer is slow for some seconds and Wifi suddenly stop working, either not detecting any network or removing the wifi icon
When I hit CTRL + ALT + F3, I see:
Chipset Reset Failed
...
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