Questions tagged [networking]

Managing and using network connectivity on a Ubuntu system

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Ubuntu Settings shows No Wifi Adapter found. But in lshw -C it shows Wifi Interface

I Use a HP Laptop containing Realtek RTL8821CE device and having Ubuntu 22.04 LTS (Jammy). I was trying to install droid cam which needed a secure boot key enrolling. Prior this step my wifi was ...
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ufw default deny routed not working

I am setting up ufw default deny routed and it is not reflecting in iptables -L How to ensure it is disabled what I tried: root@VM01:~# ufw default deny routed Default routed policy changed to 'deny' ...
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more than one "network connectons" but one nic

In Ubuntu20, I use a USBLan device. When I install this device, I see two "network connections". I use ifconfig -a, there is only one NIC. which component in Ubuntu creates the "...
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Internet connection/WiFi not working after VPN connection failed

A couple of days ago I did a trial run of Cyberghost's VPN service. Have since cancelled my subscription, but that's beside the point. My problem is: I installed the cyberghostvpn package on my ...
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Ubuntu 20.04.4 LTS:After temporarily losing connection at router my Ubuntu server can no longer connect at all

Last night we had a storm that interrupted internet connectivity temporarily. Since then my Ubuntu server has been unable to connect to the internet at all while all other devices have recovered fine. ...
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Wifi issue - 20.04 LTS vs Centrino Advanced N 6205

I am encountering lot of drop outs and instability (constant drop out) with my Wifi on Lenovo x230 with card Centrino Advanced-N 6205 Taylor Peak Physical id: 0 bus info: pci@0000:03:00.0 logical name:...
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How to disconnect the network interface

I have a problem. When my ubuntu 20.04 start, network works ok but, after 5 minutes, it disconnects but I don't know why. I have checked the logs but I only see that the network goes from global to ...
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How to access web server with public IP through private tunnel?

There are 2 networks like this image and a site to site tunnel. Users in site 1 (Home) can access the web server in site 2 (Office) with its private IP, but I want them to access the web server ...
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Need help set the dhcpcd client to request for option 17 in its DHCP DISCOVER message

Could you please help me with a sample config of dhcpcd config file where it requests Option 17 from the DHCP server using the "-Q, --require option"? The idea is to pass a FQDN from the ...
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Ubuntu 20.04.4 LTS - Wake on LAN not working - PC Powering on but not booting into OS

I have a raspberry pi that I'm using to power on my old HP PC (HP Compaq 8200 Elite SFF) I have enabled Wake on LAN the ethernet interface of my PC by following instructions in https://linuxtut.com/en/...
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apache tutorial didn't work

I followed the Apache2 Install and Configuration tutorial, but it doesn't seem to work. https://ubuntu.com/tutorials/install-and-configure-apache#1-overview I had no problem access my local website ...
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Barrier doesnot work for Linux to WIndows connection

Hello I have been trying for a while to connect my mouse and keyboard using barrier between ubuntu and windows. I tried different way to connect. for example changing port, disable enable ssl, puting ...
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Configure to change from wifi to ethernet on next reboot

Currently my Ubuntu 22.04 LTS (GNU/Linux 5.15.0-1006-raspi aarch64) on a Raspberry Pi is using wifi for network. Using the command ip addr I can see that eth0 is set to DOWN and wlan is UP. The ...
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is there a difference between using NetworkManager.conf and using nmcli

In NetworkManager.conf, I can specify [keyfile] unmanaged-devices=interface-name:vboxnet0 I can also use nmcli as follows nmcli device set vboxnet0 managed no is there a difference between these two ...
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wpa_supplicant conflicting with hostapd on the same interface

I am trying to make wpa_supplicant and hostapd work simultaneously in order to use a single interface to connect to a wifi network and to generate an access point (that does not provide internet). If ...
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Kubuntu 21.10 stopped connecting to internet via wifi

Problem: no Internet connection after connecting to home wifi "Limited Connectivity" Machine details: Dell Precision 3560 / Kubuntu 21.10 (upgraded from 21.04) Logs: $ ping 8.8.8.8 ping: ...
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why did the command udhcpc fail to set timeout on linux?

Now,I want to get an ip in 5 seconds by the command : udhcpc -i eth2 -R -A 5 I wish if after 5 seconds, the above command can't get an ip, this command can exist auto, but I found the option "-...
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How to auto connect to vpn server if connection is down (VPN always on)

I have an openvpn connection with a client.conf file. I have set this to auto connect on startup however I would like to also make it reconnect if connection goes down. There does not seem to be a ...
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Ubuntu VLAN IP Interfaces Unreachable Remotely

I've configured 5 VLAN interfaces and all appear to work fine. I've only one gateway4 IP configured for one of the VLANs and this is serving as the default gateway. And that works. I'm able to ping ...
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Ubuntu randomly not detecting USB devices and networking randomly not working

I am dual booting Windows 10 and Ubuntu 22.04. I'm currently attempting to completely transition from Windows but have ran into a weird issue. Although I'm running a new Ubuntu and different hardware ...
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Install RT5370 usb wifi drivers on Ubuntu 22.04 LTS + raspberry pi 3b

I'm trying to install the RT5370 usb wifi adapter on raspberry pi 3b but I can't install the drivers. I downloaded the linux drivers from https://www.mediatek.com.es/products/broadband-wifi/rt5370 ...
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Bind9 - dig example.com not showing the private IP address

I have installed Ubuntu 20 and installed the bind9. 'DNS : ns1.example.com' 'IP: 10.201.1.253' Created a zone files ; ; BIND data file for local loopback interface ; $TTL 604800 @ IN SOA ns1....
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Recieved socket error when trying to connect 3D printer

I am trying to run a version of the EZT3D S2 foldable printer, similar to the artillery printers, there are lots of copies and "versions" of this printer under many names, from China, so it ...
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Forward different external IP addresses to different localhost:ports on a local machine

We are spinning a nodejs server that emulates a machine's API on Ubuntu Linux. The objective is to be able to connect to i.e. 10.0.0.5:4028 and this should connect to localhost:4020, 10.0.0.6:4028 ...
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How to get the average ping time?

Here's a real result of my ping 192.168.1.1 command: 64 bytes from 192.168.1.1: icmp_seq=964 ttl=64 time=1018 ms 64 bytes from 192.168.1.1: icmp_seq=965 ttl=64 time=921 ms 64 bytes from 192.168.1.1: ...
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A6100 wifi adapter not installing correctly with known techniques

I have Ubuntu 20.04 and a A6100 wifi adapter. I've tried using Chilli's recommendations and when I get to github in terminal I'm asked for a username and password. I'm now stuck. Can someone help me ...
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Where do I find the correct serial/ethernet port in /dev to connect to my Cisco switch using screen? [duplicate]

I'm trying to connect my Ubuntu to my Cisco business switch but I am having trouble finding the right serial port or ethernet port. Im using a usb to ethernet adapter on my laptop side. From there it'...
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Sharing Internet from Wifi via Ethernet to a Wifi repeater

Similar kind of Question has been asked and answered but my problem is a little different. I live in a building where to get Wifi, you need to buy a voucher which works on a single device for a month ...
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Macchanger set address resets to permanent MAC address after connected to a network

Every time I set the MAC address, whether to a custom or random one and connect to a network it automatically gets reverted back to the permanent MAC address. If I try adding a "Cloned MAC ...
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Chrome and Vivaldi won't work at Ubuntu 22.04

After a clean install of Ubuntu 22.04, and a few days in using the OS, suddenly Chrome and Vivaldi stop functioning. In the case of Chrome, the start page is buffering and eventually returning a "...
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Unable to connect to internet from ubuntu 20.04

I have been using ubuntu 20.04 on my lenovo thinkpad for the last one year, and I have never faced connection issues. But now, suddenly I am not able to connect. I tried to resolve it with the ...
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How to use PROLINK PRT7011L Portable 4G LTE router with Ubuntu?

I have this portable router Prolink PRT7011L Portable 4G LTE WiFi Hotspot. I use it via connecting USB cable to PC in Windows. But in Ubuntu, when I connect it doesn't detect the device. nothing ...
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Fresh install of 22.04 has slow internet and low signal indication

I have installed 22.04 on a new SSD, the old 20.04 HDD is still in place and I can boot either. Using WiFi and normally get a good signal. The internet is very slow and the signal indication is very ...
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Ubuntu 18.04.6 Connected to Wi-Fi but getting randomly disconnected from internet

I have a Dell Core i5 laptop that has Ubuntu 18.04.6 LTS. I was using this laptop since last 2 years with no problem with WiFi connection but from last 2 days, it starts showing WiFi connection issues....
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No Wi-Fi Adapter Found after install ubuntu 22.04 LTS for Thinkbook 2022 14+

No Wi-Fi Adapter Found after install ubuntu 22.04 LTS for Thinkbook 14+, cpu 12th alder lake 12700H I tried sudo lshw -c network It shows *-network UNCLAIMED description: Network Controller ...
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Ubuntu doesn't see wifi

I installed Ubuntu on a Toshiba Satellite C75 with a broadcom 43142 Wi-Fi card, which terminal acknowledges exists, but system set up only sees the Ethernet port. From my research I'm guessing my ...
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How to stop automatic printer detection?

I have a desktop computer running Ubuntu 20.04 on a LAN. Thus automatically adds all the printers it finds in the LAN which are in other rooms/offices. How to stop the automatic addition of printers? ...
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VPN keeps disconnecting ubuntu 22.04, internt connection remains connected

I am using Ubuntu 22.04. Suddenly, my VPN is disconnected. My VPN stays connected for less than a minute, then it gets disconnected. I have tried most of the solutions. solution 1: trying to run my ...
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Nextcloud randomly stops working on Ubuntu Server

Let me start this off by saying I am a Linux newbie. I recently installed nextcloud on a spare laptop I had lying around. I followed this guide [https://www.youtube.com/watch?v=2OsNGj2n2zc&...
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No wifi option on Ubuntu (20.04) [duplicate]

My wifi option suddenly got removed from my settings. How can I be unable to use the wifi? $lspci -nnk | grep 0280 -A3 08:00.0 Network controller [0280]: Broadcom Inc. and subsidiaries BCM43142 802....
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Asus Zephyrus G15 2021 with MT7921 WiFi Card: very slow internet via WiFi

Speedtest results show good results, as it is supposed to be user@laptop:~$ speedtest-cli Retrieving speedtest.net configuration... Testing from <redacted>... Retrieving speedtest.net server ...
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How to get (preinstalled) Gnome functionality that came on laptop onto a new Gnome install on 22.04 Server LTS

New Ubuntu devotee here. I got my killer HP laptop pre-installed with 22.04 Desktop (restoring access to that is another question). Love it. I added some SSDs and just installed 22.04 Server LTS on ...
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ethernet profile selection everytime upon cable insertion

[ Edit: Upgraded from 21.04 to 22.04 LTS, still same problem ] When i connect ethernet , it connects to 1 of the 2 profiles (last one in the picture) by default which doesnt work neither shows ...
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Cannot restart Networking.service?

● networking.service - Raise network interfaces Loaded: loaded (/lib/systemd/system/networking.service; enabled; vendor preset: enabled) Active: failed (Result: exit-code) since Fri 2022-05-...
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Ubuntu gets/has wrong private IP address

When I log in via SSH to my Ubuntu server (current LTS 20.04), I get a greeting message with the eth0 private IP. I now needed to change my IPs in my home network from the default 192.168.178.0/24 to ...
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UBUNTU SSH tunnel not working with Rsyslog

I want to send Rsyslog request through ssh tunnel. client(C) <----------------------> server(S) On the client side I run this: ssh -L 2222:localhost:514 user@S When I check (netstat -tulpn) the ...
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Ubuntu 22.04 Samba Server / User Cant login / windows pc cant access

First of all, sorry for my poor English. I have few questions for Samba on Ubuntu I just new noob in Linux system, my new company wanted me to upgrade our service team file server from Debian Bullseye ...
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Connected to wifi, no ping to router

I have Ubuntu 20.04.4 LTS x86_64 installed in a Dell Inspiron 15 5000. Everything was fine, until recently that I booted it up. It had no battery so it turned off while booting. After that, I can’t ...
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MAAS network firewall ports

I can't figure out, very difficult to find in documentation, what ports I need to open between rack controller and hosts IPMI interfaces subnet? And between rack controller and hosts LAN interfaces ...
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Network Issues: Ubuntu 20.04 VM on Hyper-V with VPN

I faced the systematic network issues on my Hyper-V Vm with Ubuntu 20.04: I've lost connection when I'd turned on Global Protect VPN on my host machine (Win 10). This is my netplan config: version: ...
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