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.
22,695
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"Activation of network connection failed"
I receive an Activation of network connection failed error when trying to connect to my home wifi network. I am running Ubuntu 20.04 on a Lenovo laptop. Other devices are able to connect to my home ...
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1
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tftp does not copy files from server, showing 0 bytes
I am running Ubuntu 20.04.2 LTS, and I have install tftpd-hpa following this
guide.
Config file:
# /etc/default/tftpd-hpa
TFTP_USERNAME="tftp"
TFTP_DIRECTORY="/tftp"
TFTP_ADDRESS=&...
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network manager not show bond0 lacp connection
System is running Ubuntu desktop 23.04
I am unable to update Application Software because the application does not see a network connection.
I have created a LACP 802.3ad dual nic connection using the ...
- 90
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Ubuntu22.04 cannot connect to the network after the time is messed up
My computer has dual systems. Windows and Linux read RTC in different formats, but I don’t want to change the reading methods of these two systems. Windows can connect to the network after the time is ...
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30
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SSH to Ubuntu virtual machine under Azure, permission denied (publickey)
We do have a virtual Ubuntu machine under Azure. The IP address is known (for this message it will be named "thatIP").
Setup to log in via a certificate does work.
We are now trying to set ...
- 184
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30
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how to set a static ip address for a server
I have file server that uses Samba. I connect to it through VPN and SSH. Sometimes, the server's IP address changes, and I can't access my files or SSH into it. I want to set a fixed IP address, but I ...
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33
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Network Connection Drops and Works Only After a Reboot [Ubuntu 22.04.3 LTS]
Problem
The ethernet connection drops a while (unknown/random), and only rebooting the machine resolves it, until it breaks again after some time.
I have tried to monitor the network graph in the ...
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What is the proper mechanism to configure LACP?
I have seen a few different commands used to configure LACP 802.3ad in Ubuntu 23.04?
The use case is basically personal learning. I don't have a network usage that will benefit from link aggregation. ...
- 90
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Ubuntu hosting VPN for personal VPN network
This is probably a simple solution and I am missing something but I have a home network that does not have a static IP and I have a domain controller and a samba share on that DC, I want to be able to ...
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Network Problem, when trying to connect to Eduroam Wifi
I can connect fine to any other networks.
And I can also connect to this wifi, when I am at the center of it, but it's like when I get a bit too far from its original startpoint it gives up on ...
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25
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Cannot connect to Playstaion Network on Linux laptop
Cannot connect to PlayStation Network on Linux laptop any more -
Error A connection to the server could not be established.(18.11681160.1695034653.11d6fdbf)
Tried several Browsers / networks / vpn, ...
- 21
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21
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EAP-TLS for *wired* network not working
Trying to connect a computer running Ubuntu 22.04 LTS (X86-64) to a 802.1X/FreeRADIUS controlled Ethernet network, using self-signed certificate. PEAP works perfectly, but I can't get EAP-TLS to work.
...
- 101
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23
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Public DNS, like provider
I have
VPS with public IP 1.2.3.4
Ubuntu + Wordpress, which opens from http://1.2.3.4.
Hosting provider who needs money for DNS A record.
Domain name mysite.com.
I know how to work with hosting and ...
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77
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How to disable the unlock default keychain at startup?
I primarily access my Ubuntu 22 desktop remotely (private LAN, but not physically accessible most of the time)
Once the Ubuntu machine is logged in and keyring unlocked, the RDP / vnc experience is ...
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19
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Running app/VPN for a single user
So I have done research in regards to installing an app for a single user, I have a VPN app which I can install on ubuntu desktop, but it installs system wide, on a second user account when I launch ...
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33
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Too many network interfaces in wsl ubuntu
When I entered the command ip addr, the output is as follows:
8: eth0: <> mtu 1500 group default qlen 1
link/ether 50:5b:c2:cc:e0:98
inet 169.254.33.236/16 brd 169.254.255.255 scope ...
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38
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Can't connect to Linode using ssh
Trying to connect from Ubuntu 22.04 through ssh to linode. But it's giving:
ssh: connect to host xx.xx.xx.xxx port 22: No route to host
I tried ping xx.xx.xx.xxx and it worked fine. Output of telnet ...
- 119
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WiFi is connected but WiFi icon not showing ubuntu 20.04
This is my first question on this page. So I might have problem, then please let me know :D
Hi. I start to learn Ubuntu for my University lecture.
I installed Ubuntu 20.04.5 LTS (Focal Fossa) on Mac ...
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1
answer
53
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Simulate single big network delay and packet burst after
I'm testing the Opus codec and VoIP stack which uses it.
I have synthetic test utility which sends internally Opus RTP traffic between two ports on loopback interface + this writes resulting audio to ...
- 103
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37
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Connectivity Issue on Ubuntu 22.04 LTS - Wi-Fi Network Drops
I am encountering a persistent issue with my Wi-Fi network on Ubuntu 22.04 LTS. After connecting to a Wi-Fi network, it works fine for an undetermined period, but then it becomes inaccessible on my ...
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34
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Ubuntu Desktop 20 and 22 DNS defect with manual IP configuration
I installed Ubuntu 20 / 22 desktop from an ISO into VMware Player. During installation time the VM has internet access, with an ethernet interface using NAT. It gets a valid IP configuration through ...
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18
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Automatically created iptables rules created by Docker seem strange
Here are the rules that I don't understand (those are created automatically by docker on my ubuntu machine):
-A FORWARD -i docker0 ! -o docker0 -j ACCEPT
-A FORWARD -i docker0 -o docker0 -j ACCEPT
So ...
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31
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Wifi internet is not working in my ubuntu system
I have installed Ubuntu in my system but when I am using Wi-Fi then after sometime the Wi-Fi internet is automatically shut down
When I check my wifi driver it shows me something like this
*-network ...
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29
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Citrix Gateway Ubuntu 22
I need to install the corporate nsginstaller64.deb on Ubuntu22 to access the corporate Citrix Gateway. While installing following error raises:
The following packages have unmet dependencies:
...
- 101
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32
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The difference in network configuration files between USB install and PXE autoinstall
when i use pxe with autoinstall install ubuntu server 22.04 or 23.04,the network configuration automatically generated like this
# This is the network config written by 'subiquity'
network:
...
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31
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vmware using proxy vpn to perform apt-get is invalid
I'm not using v2rayN proxy tool to execute my sh script in vmware ubuntu
Each time apt-get is executed,always returns "400 bad request",
But I copied the error link, and on my windows ...
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-1
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43
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Problem with wireguard and Ubuntu server
I have a VPS Ubuntu server on AWS on which I run a Wireguard client. My Wireguard server is in my home router with Open WRT firmware.
The server works correctly, because when I connect remotely with ...
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59
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Help connecting to my samba server from windows!
I'm very new to Linux so please bear with me here. I set up a Samba server on my LAN and now I'm trying to connect to it from my Windows desktop. I can see the server in my file explorer under ...
- 11
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38
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Ethernet not working after power outage - network UNCLAIMED
I have an Intel NUC i7 Series 11 used as a home server with Debian 5.10.70-1 installed. It has been running smoothly for about a year. Then came a power outage. When the power was back my server ...
- 109
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31
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How to Persist Options rotate in Resolv.conf in a dynamically generated file
I am looking for Options to rotate the two nameservers I have and I read options rotate is one way to do so.
However my /etc/resolv.conf is a dynamically generated file which is generated via /run/...
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-2
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1
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39
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Configuration OpenVPN Client
I would like to know if any of you would be so kind as to check whether my ovpn configuration file (for OpenVPN Connect) is correctly configured as I find that it works but in a random manner (it ...
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18
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How to remove bridge from eth0 or restore default eth0?
I've created a bridge between eth0 and another switch, 'br0', how can i remove this bridge? I think it's preventing me from having network access.
Also I don't know if the current state is really a ...
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1
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63
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How to debug failing CIFS connection?
Connection to Samba share fails with one specific ubuntu instance/device alone - any ideas what i could check on top would be highly welcome.
sudo dmesg:
[ 1214.845174] CIFS: Attempting to ...
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29
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Trouble SSHing into Raspberry Pi with Passwordless SSH Key on Ubuntu Core 20
I have successfully created a bootable Ubuntu Core 20 SD card using Raspberry Pi Imager. I generated an SSH key using PuTTY Key Generator without a password and added it to my Ubuntu account's SSH key ...
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4
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1
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150
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ifupdown-wait-online.service (even if disabed) / xfce takes 5 mins to load
I'm using Ubuntu 22.04 right now and ifupdown-wait-online.service takes 5 mins to load,as well as xfce. I gave a :
# systemd-analyze blame
and this is the result ; is exactly like I've thought :
...
- 515
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43
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Intermittent ethernet configuration problem based on presence/absence of 4th SSD
Ubuntu Server 22.04.3
My computer has 4 SSDs. With all SSDs in place, the computer boots and picks up an IP from the router. When I shutdown, then remove the fourth SSD, then boot up, the computer ...
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1
answer
46
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LXD network lxdbr0 is "unavailable". What does that mean and how can I fix it?
When trying to create an LXD container I get:
$ lxc launch ubuntu:
Creating the instance
Instance name is: included-mite
Starting included-mite
Error: Failed pre-start check for device "eth0"...
- 101
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138
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Ubuntu delayed startup (systemd-networkd-wait-online timeout)
I'm experiencing delayed startup caused directly by systemd-networkd-wait-online timeout (2 minutes). Could you help me diagnose this? Especially how to dig deeper in systemd-networkd-wait-online ...
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34
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Hotspot on Ubuntu 23.04 terminates after a few seconds
I'm using the GUI to open a hotspot in Ubuntu 23.04 (Settings > Wifi > ... > Turn on Wifi hotspot). Then the GUI shows me the info page of the hotspot, but when I wait for a few seconds, the ...
- 283
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23
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Unable to bind MAC Address with interfaces in ubuntu
I am running Ubuntu 20.04 on an AWS environment. While trying to bind MAC Address to interfaces in netplan YAML file. The changes are not working as expected.
I followed the following configuration, ...
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6
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2
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Why can't I ping over IPv6?
I can browse normally, I can create this question for example, apt update works fine, but when I was trying to install firebase using npm, I received a time out (npm ERR! network request to http://...
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30
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network lightning strike issue
Again, I travel allot. I'm relatively new to Linux running Ubuntu 22.04.
I was downloading on an hotel WIFI network when lightning knocked out power.
After rebooting, all browsers think I'm still ...
2
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0
answers
36
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External HTTPS succeed, internal HTTPS requests timeout on home server
I am running Ubuntu Server 22.04.3. I am using it to serve an API built on Flask, which goes through Gunicorn and NGINX to hit the outside world. The server works as expected for requests served over ...
- 21
2
votes
1
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100
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No internet connection after upgrading to 5.15.0-83 on Ubuntu 22.04.3
A few days ago I ran an automatic upgrade on my Ubuntu 22.04.3. Today I restarted my PC and it now it cannot connect to the internet.
I tried both Wi-Fi (in 2 different cards) and a LAN cable, but the ...
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53
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Server connects to wifi internet but there's no wifi adapter in the config/settings (rtl8821ce)
I'm seeing a lot of "wifi connects, but no internet" questions. Mine is the opposite "there is internet, but doesn't connect" :)
Well, obviously connects somehow, since there is ...
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0
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46
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Network intermittently fails to come up during boot
I have a PC with Ubuntu 22.04 Server as the OS. I chose to encrypt the OS drive with LUKS, and installed dropbear to ssh into the machine during boot and unlock the drive. This only works ...
- 413
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35
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Cannot ssh to ubuntu vm (not localhost)
I'm trying to connect to my VM that's running Ubuntu. I figured out its IP address as well as the IP address of my host computer and inputted into the network settings via the VirtualBox Manager like ...
- 103
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1
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149
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I upgraded to 22.04 from 20.04 and now I don't have a wifi adapter and cannot connect to the internet
I tried to upgrade from 20.04 to 22.04 on an HP envy and after the installation there is no wifi adapter and no bluetooth either.
The kernel I'm booting into is 5.13 if I'm not mistaken. I was hoping ...
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60
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Cannot ping Ubuntu from another device on the same network
I have downloaded Ubuntu 20.04 on my Windows laptop. The problem is that I cannot ping the Ubuntu app from another device on the same network, except the host machine.
What I've done so far:
Disabled ...
- 111
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29
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some apps are not using the proxy I provided... I think
New linux user here
I've been using http injector to share my vpn trough hotspot for my laptop (running ubuntu 22.04) which uses a proxy setup for my wifi connection. I've done all that and I'm using ...
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