All Questions
Tagged with networking 20.04
914
questions
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DNS problem for only some devices on our network
I'm running into a DNS issue in our office's network. We had a power outage and when the router rebooted a few of the servers on our network started to have problems connecting to other devices on the ...
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-1
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0
answers
37
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Ubuntu 20.04.6 (kernel 5.4.0) - Wi-Fi Driver Intel AX211
Looking for guidance/documentation I can follow, to get wifi firmware/drivers built/backported and installed for my older kernel version.
Trying to get a very new card:
Internal Wi-Fi Antenna Intel Wi-...
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-1
votes
0
answers
52
views
How to troubleshoot "Operation not supported (-95)" output from "iw dev wlan0 set 4addr on" command?
I am trying to follow this solution in effort to solve my question/questions posted on AskUbuntu and Nvidia Jetson Developer Forum
I am running Ubuntu 20.04 on an Nvidia Jetson. The Jetson has a ...
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1
answer
53
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FTP client timeout to all tested publically available FTP servers
I am setting up a desktop with a newly installed Ubuntu 20.04LTS. The desktop failed to connect to any FTP server I tried that can be connected to by other machines. ping to these ftp servers worked. ...
- 1
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0
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14
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TP Link UE200 fails to initialize during boot
I had ordered a USB to Lan adapter from TP link (link) which used to work perfectly fine around 6-8 months ago in Ubuntu Server 20.04 running Raspberry PI 4B (4GB RAM) and I recently tried to connect ...
- 23
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0
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39
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Wireless Adapter not Found Ubuntu 20.04 Kernel 5.15
I am attempting to connect to my network via a 6E AX210 integrated wireless adapter. I am running Ubuntu 20.04 from a bootable external HDD (crucial x8) and have installed iwlwifi-ty-59.601f3a66.0.tgz ...
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34
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"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
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77
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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
1
answer
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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53
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I have Lenovo legion y540 and Ubuntu 20.04 on it , i have some probems because my wifi icon is disappear and i can't also run internet with ethernet
I was trying to download my gpu drivers because it isn't found after i finish with the same steps my friend try and done it need to reboot and when it open i can't find the wifi icon and also touch ...
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14
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Two instances of Netatalk after upgrade Ubuntu Server 18.04 to 20.04
I have Two instance after upgrade
/usr/sbin/netatalk
and /usr/local/sbin/netatalk
For now second one is working after restoring from backup library /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6.0.2
but ...
0
votes
0
answers
70
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I can't access internet anymore after uninstalling pihole from my ubuntu server
I can still ssh to the server within local network.
I can't ping google.com or 8.8.8.8.
Here is the wireless-info script result:
https://paste.ubuntu.com/p/63t9bN7Dc9/
0
votes
1
answer
336
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chrony conflicts with time-daemon
I was trying to install freeipa-client on ubuntu 20.04 that will be used on a client with no apt access. I mannualy installed all the required .deb using dpkg.
after I successfully installed the ...
- 1
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0
answers
41
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Wifi stopped getting connected in Ubuntu 20.04
My Ubuntu 20.04 was working all fine, but all of a sudden I am not able to connect to my wifi as it is keeps on asking me for the wifi password again and again.
I tried to remove the wifi password in ...
1
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0
answers
253
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When does ubuntu initiate a DHCP lease renewal?
After doing some research. I found out that some DHCP clients initiate a lease renew when 50% of the lease time has elapsed. And I need to know if this is valid for ubuntu 20 and later DHCP clients. I ...
- 111
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75
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ifconfig show unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 for usb modem
I am using
Description: Ubuntu 20.04.6 LTS
Release: 20.04
Codename: focal
when I do ifconfig -a usb modem show following output
wwan0: flags=4240<POINTOPOINT,NOARP,MULTICAST> ...
- 1
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votes
2
answers
221
views
Issues with version control for UBUNTU 20.04 and 22.04
I have a computer that had ubuntu 20.04 installed on a Windows OS, the ubuntu 20.04 app was uninstalled, but under the Linux folder in Windows "Documents" under the Linux section there is a ...
0
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1
answer
3k
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How to set DNS from command line on Ubuntu 20.04 Desktop?
I'm trying to set a DNS server on Ubuntu 20.04 Desktop. So far this is what I have.
In /etc/systemd/resolved.conf this is the content:
# This file is part of systemd.
#
# systemd is free software; ...
0
votes
0
answers
179
views
Slow Wi-Fi speed with Broadcom BCM4321 on 22.04
I'm new using Ubuntu, so something I'm still learning, so I'm having a few issues with my Wi-Fi connection.
I installed Ubuntu 22.04 LTS, made all configs and I had to install firmware-b43 to get Wi-...
0
votes
1
answer
65
views
RPi 4B with Ubuntu Server 20.04 fails to connect to Wi-Fi Sometimes
I have Ubuntu Server 20.04 installed in RPi 4B. The problem is does connect to a network today but if i try to connect to the same network next day it fails. Why does this happen?
My .yaml is as below
...
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63
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Why does my netplan configuration not work?
I am using Ubuntu20 server, and its default Netplan. The server is a bare metal under OVH management, so I have very limited control over the changes I can make on the network interface.
I have ...
- 1
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0
answers
53
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New Ubutu 20.04.4LTS shows only lo for networks
edit added:
linux-firmware:
Installed: 1.187.27
Candidate: 1.187.27
Version table:
*** 1.187.27 100
100 /var/lib/dpkg/status
I've got a Dell XPS 13 9315 with Ubuntu 20.04.4 freshly installed by Dell. ...
- 93
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votes
0
answers
23
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Restricting Download Bandwidth on Linux Using 'tc' Filter for IP 0.0.0.0/0
I want to restrict download bandwidth using tc. I am using the following commands:
root@ubuntu:/home/jakob# tc qdisc add dev ens33 handle ffff: ingress
root@ubuntu:/home/jakob# tc filter add dev ...
- 1
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0
answers
38
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How is this possible that one of the peers can't access the internet while the other one can
With the help of an extensive number of guides, I managed to create a working VPN server and even added one client, however, when adding a second client, a problem arose, the configurations seemed to ...
- 1
0
votes
1
answer
365
views
Ubuntu public IP
I'm from Romania and I setup an Ubuntu server and it is on a private IP address "192.168.x.x".
I contacted my Internet Service Provider (ISP) and he told me
this Dedicated ipv4 is not ...
0
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0
answers
65
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No Wifi Adapter Found Ubuntu 20.04
I recently bought a used Thinkpad T480s and put a fresh Ubuntu 20.04 image on it. The wifi worked fine for the first time it was on, but now the intel 8265ngw adapter can’t be found. I used lspci and ...
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1
answer
319
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linux tc command don't affect download speed
I want to set up upload and download restrictions using the 'tc' command on Linux. I am working on Ubuntu 20.04.4 LTS.
By applying the following commands, the upload bandwidth is limited to ~1 Mbit, ...
- 1
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0
answers
191
views
adding ipv6 addresses to loopback sub interfaces
I have Ubuntu 20.04. I have three distinct loopback interface lo:11, lo:12 and lo:13. I want to assign a unique ipv6 address to each of those loopback interfaces and advertise them with bgp(v6).
The ...
0
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0
answers
76
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Syntax to use deja-dup over network with ssh
Currently I use deja-dup to backup to a external ssd. The SSD is mounted under UbuntuBackup with folder mini. I am about to put this computer into semi-retirement. Then I would like to back up my new ...
0
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0
answers
157
views
Two port NIC, one port works
I have a simple two port NIC plugged directly into an Ubuntu 20.04 computer. One port works. ip a shows one port (ENPxxB) up and one (ENPxxA) down.
Nothing I've tried (sudo ifconfig ENPxxA up or sudo ...
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1
vote
1
answer
125
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Why do I have intermittent Wi-Fi disconnections in Ubuntu 20.04.6?
I'm using Ubuntu 20.04.6 and have been experiencing intermittent Wi-Fi disconnections during which my Wi-Fi icon turns into a question mark.
I was able to get all the below information before my WIFI ...
- 3,710
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219
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How to fix extremely slow network conection - Ubuntu 20.04 LTS?
Edit below, 2023-12-12:
The issue has been resolved.
Turns out it was a browser-related problem.
After reading all the comments and trying various solutions, I went to check if the browsing speed ...
1
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0
answers
106
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Any idea how to bring back the network without netplan cmd?
There was a power-outage in our lab during the weekend, and when I was to recover one of the ubuntu server and have it booted, the network was not set automatically.
So as of now, Running "...
- 133
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votes
1
answer
98
views
Knockd listen to a specific IP address
In Knockd how do I listen to a specific IP address from an interface that has multiple IP addresses?
Knockd only has the option to listen by interface but not an IP address.
Example
Interface eth0 has ...
- 93
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0
answers
26
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Ethernet disconnected trying to fix brightness slider on Ubuntu 20.04
Running an ROG G15 laptop.
I recently installed Ubuntu 20.04 in a dual boot setup with Windows 10 as the other OS. One thing I noticed was that my brightness slider wasn't working, so I looked it up ...
- 11
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votes
0
answers
80
views
Network connection error - unreachable with one user
I have a desktop with Ubuntu 20.04 and it has the following problem. When I try to connect to the wired network it works with one user and with another, despite connecting, if I try to access the ...
3
votes
0
answers
213
views
Unable to create OpenVPN Stunnel tunnel
I want a setup like this:
OpenVPN Client <==> Stunnel Client <==> INTERNET <==> Stunnel Server <==> OpenVPN Server
(OpenVPN client only talks to Stunnel client and so on and so ...
- 31
0
votes
1
answer
272
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lshw -C shows Network Controller UNCLAIMED and incorrect product name (Ubuntu 20 fresh install, Dell Precision 3581)
Doing an install of Ubuntu 20 on a brand new Dell Precision 3581. The high level problem is that wired connections work but there's no wireless options in the Network settings (i.e. the wireless ...
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147
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No IPv6 link-local address assigned to ethernet adapter, but is working on Wi-Fi
I have a fresh Ubuntu 20.04 install on a system with 2 interfaces - Ethernet (enp2s0) and Wi-Fi (wlp3s0).
On the enp2s0 interface I set a static IPv4 address and wlp3s0 is using DHCP for Internet ...
- 937
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1
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96
views
WIFI blocked once a day
I have a really strange behavior, it happens that at certain moment in the morning my wifi connection stops working even if the connection symbol is on. If I try to reconnect to any network I cannot ...
0
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0
answers
159
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Firefox doesn't open google on Ubuntu 22.04.3 LTS
I installed Ubuntu 22.04.3 LTS on my Lenovo ideapad 520-15IKB and since it is installed, firefox doesn't work. It doesn't open google.com via the normal wifi network.
I installed Chromium and it works ...
0
votes
1
answer
236
views
How to add code to .bashrc without causing errors?
I'm learning how to passthrough my NIC to my KVM.
This guide says to add the following code to the file ~/.bashrc
#!/bin/bash
# change the 999 if needed
shopt -s nullglob
for d in /sys/kernel/...
- 55
1
vote
1
answer
110
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Problems on Ubuntu Dell laptop when unplugging or replugging AC power
I'd like to apologize in advance that this question is insufficiently specific. I'd like to make it more specific and provide relevant info from journalctl or other sources as needed, so please do let ...
- 111
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0
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456
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Ubuntu-22.04.3-desktop-amd64.iso with virt-manager-4.1.0.tar.gz install possible?
I have no Internet until I install a KVM router.
Therefore, I think I need Ubuntu-22.04.3-desktop-amd64.iso to install from USB, with enough packages/libraries so that virt-manager-4.1.0.tar.gz will ...
- 55
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0
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50
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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 ...
0
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0
answers
212
views
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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1
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0
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386
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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
3
votes
3
answers
4k
views
ubuntu 22.04 / Mediatek mt7921e network card "No wifi adapter found"
I have just installed ubuntu 20.04 (alone, no dual boot) on a hp elitebook laptop (which is new).
Wifi worked for a few hours, but then stopped working ("No wifi adapter found"). Ethernet is ...
- 41
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votes
0
answers
40
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ethernet(eno3) unmanaged on ubuntu server 20.04
I need solution to ethernet(eno3) unmanaged on ubuntu server 20.04, the pc is blade server could not browse internet on firefox browser.
But other app like anydesk could connect internet(lan)
2
votes
2
answers
316
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Netplan apply causes interfaces to go down temporarily
I have an IP on interface ens160 ( 10.209.70.147 ) which is up and responding to traffic. Then I add another interface eth0 in "connected state" from vmware console and add another IP ( 10....
