Questions tagged [networking]

Managing and using network connectivity on a Ubuntu system

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Ubuntu constantly switching between 2.4 and 5Ghz access points

I have an issue where my wifi is constantly dropping out every few seconds. I investigated and it seems like it is repeatedly switching between my 2.4 and 5Ghz access points. Here's the log from dmesg:...
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Symbolic link from Nas to home folder

I'm trying to create a link from my unraid Nas to my Ubuntu vm that I have running in it but ever time I make it the link says its broken and wants me to remove it
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How to connect your phone as a USB modem to kubuntu

I just downloaded kubuntu 20.04 and immediately installed the drivers with the apt install nvidia-driver-460 command. After that, I can't connect the phone as a modem, although everything worked fine ...
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Wifi can not find any networks after kernel update

After the last update on Ubuntu 18.04 (4.15.0-142-generic) my wifi fails to find any networks. wifi not finding images When I run sudo lshw -C network I get the following: *-generic DISABLED ...
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a problem with my internet connection

Hello I am new to Ubuntu, I installed it following all the steps except in step 5 of the guide (https://ubuntu.com/tutorials/install-ubuntu-desktop#5-prepare-to-install-ubuntu) where I did not allow ...
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I want to use internet on my android device while connected to my laptop's hotspot

I am building an app that will send data to a Python server hosted on my laptop. However, it will also need an internet connection to send some stuff to Google Cloud. When my android device connects ...
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1answer
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hosting website my own PC “Ubuntu Server” DMZ

i got curious about turning my local ubuntu server for my personal website i set DMZ to see my ubuntu server and in domain registrar i set my IP and NS i set with bind9... however i can only see my ...
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Is it possible to have a wireless network and a wired network simultaneously, and to have different applications use one or the other?

Is it possible to have a wireless network and a wired network simultaneously, and to have different applications use one or the other? For instance, to have Chrome use the wireless network, while ...
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20.04.2. Running basic commands like copy and executing shell scripts using runcmd of cloud-init file

#cloud-config autoinstall: apt: geoip: true preserve_sources_list: false primary: - arches: [amd64, i386] uri: http://us.archive.ubuntu.com/ubuntu - arches: [default] ...
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Ethernet problem on Ubuntu 20.04 in dual-boot with Windows

I'll try and make this short, Not that long ago I had Kali Linux but I didn't use it cause I couldn't get Ethernet on it so I uninstalled it and downloaded Ubuntu 20.04 today, I booted into it, ...
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ethernet not working but is connected

The short story: I just installed Ubuntu 20.4.2 on a tower that was previously running on Ubuntu 18.x. The network was working fine before the install, but I can't see any network now. I can see the ...
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How do I stop eth0 being renamed ens3

I am working with Digital Ocean and their help team is unable after over a dozen emails to help me register the network on a VPS spun up from their backup image. Their instructions to try to change ...
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1answer
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Duplex printing settings ignored when printing on Kyosera network printers via ipptool / cups

I have added several Kyosera network printers on Ubuntu 20.04 LTS via CUPS web admin console. They are all set up and working but double-sided printing settings are ignored and documents printed one-...
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Ufw blocks incoming and outgoing connections

To update firewall rules, reloading ufw ufw reload blocking incoming and outgoing connections for around 2 seconds, untill it completes reload process. I have set already the default policy deny for ...
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1answer
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IPTABLES/UFW: Deny ssh (on alternate port) requests from WAN, and allow ssh (on alternate port) from LAN. HOW TO?

I am running Ubuntu server version 20.04. I have configured my ssh server to listen on an alternate port (port 40001) in my sshd_config file. I want to allow incoming traffic from anywhere on my local ...
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1answer
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How to check if my device supports Wake on Wlan

There seems to be very little documentation about this. I didn't find much more than this page from canonical How can I check if my Wi-Fi device supports such a feature? And does also the motherboard ...
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Kyocera network printer suddenly not reachable on ubuntu

After a reset of our local network, the Kyocera FS-C5250DN printer does not work any more. I tried to remove and add it again: When trying to add, the system settings dialogue finds it in the network ...
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Ubuntu 16.04 Ethernet connected but no internet access

I have an ubuntu device that is connected to ethernet "eth0" but no internet access. below is the output for nmcli device show eth0 GENERAL.DEVICE: eth0 GENERAL.TYPE: ...
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How to auto switch to preferred wireless network

I have two wireless networks (fiber router & phone). I want to Set the Router wireless as primary When the primary network is off(Power failure) autoswitch to secondary. When the primary network ...
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ConnectionRefusedError: [Errno 111] Connection refused

Executive Summary. I get "connection refused 111" when trying to communicate over sockets in Python. When the connection is refused, THE LISTENER STOPS LISTENING. Same problem occurs using ...
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1answer
32 views

Fixed address on DHCP server isn't working

I'm running Ubuntu 20.04 as a DHCP server and I tried to assign a fixed address to a client which is another Ubuntu os on a Virtual box, and both of them are in the same internal network, but, it ...
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Can't connect any outside host (using ipv4 and tcp)

Using Ubuntu Server 20.04.2 (LTS) as a template in VMWare Cloud Director. Basically I can reach I can reach any host in my subnet 10.16.0/24, when it comes to connecting thru the gateway at 10.16.0.1 ...
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iptables - firewall configuration - Ubuntu Script 18.04

I need help with configurating iptables. I've made some progress which i think might work like, but i'm not sure. Looks like this: #!/bin/bash #changes NET="10.10.10.0" ADMIN="10.10....
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wireguard no handshake and no ping. Firewall is inactive

wg show command on server: > interface: wg5000 > public key: ************************** > private key: (hidden) > listening port: 51824 > peer: ************************...
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guess ethernet interface is bounding, where would I find a log that proves or disproves

I have a program that is sensitive to ethernet interface changes or bouncing on and off. The program in question is a monster (microk8s), so it could be failing for other reasons. Also, on occasion, ...
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ASUS USB-AC53 Nano on Ubuntu 20.04, is recognized, but cannot connect, keeps asking for password

I have bought ASUS USB-AC53 Nano wifi adapter, and am trying to make it work on Ubuntu. So far I have tried all possible steps I found on the google. I have used drivers from these repos: https://...
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Issues with Netplan - Static IP

With the release of Ubuntu Server 20.04 I've had some weird issues concerning Netplan. I'm a student so I use Ubuntu Server as a virtual machine and I have to move a lot (which means, changing IPs all ...
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OpenvSwitch trunk to real switch

I tried to configure a trunk interface on OVS with a real switch but it doesn't work and I don't know why.. OVS configuration : ovs-vsctl add-port br0 eno2 vlan_mode=trunk tag=4002 ovs-vsctl add-port ...
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Access point incl subnet

I’m running Ubuntu 20:04 on nuc. I know how to make a access point via settings and it works but can I run a “guest” subnet on the same WiFi card at the same time ? I will have one subnet 192.168.1.x ...
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Internet is getting disconnected frequently for Ubuntu VM

After Reading so many articles and posts , I am still not able to solve the problem of internet dis-connectivity inside my Ubuntu VM . I am using following tools : 1: Windows 10 host machine 2: Oracle ...
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How to disable connection reset on DHCP Timeout?

Have a shiny new Latitude running Ubuntu 18.04 with all the updates. I'm trying to replicate a network manager config that I have working on CentOS 7 and Debian where I have one Untagged and several ...
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1answer
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Network Size is 100Mbit/s, but my capacity is 1Gbit/s. I have I219-V Ethernet connection

My Network size is 100Mbit/s, and i wanna change it to 1Gbit/s, because my capacity is 1Gbit/s. *-network description: Ethernet interface product: Ethernet Connection ...
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1answer
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can not access USB shared drive from Ubuntu to Ubuntu 20.04

I need help with the following problem: I can not access a shared external USB drive from one Ubuntu machine to another Ubuntu machine. Machine 1 = Raspberry Pi 4 with Ubuntu 20.04 (new installation) ...
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SSL certificate only works on a port

I use an SSL certificate from Letsencrypt and this worked for me forever. Today an error has occurred that the SSL certificate is not secure. I use webmin as Control Panel and when I access webmin ...
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1answer
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Why do i get awful network speeds on Ubuntu 20.04 when they were fine on Windows 10? Is it a driver issue?

I recently switched to Ubuntu 20.04 from Windows 10 on my Lenovo B50-45 with a Qualcomm Atheros QCA9377 802.11ac Wireless Network Adapter (rev 30). My Network speeds have always been normal on Windows ...
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Logging the total bandwidth of a process

I've got a fairly small monthly bandwidth cap on my VPS, so I want to monitor exactly where that usage is coming from. After searching around, every tool or guide I find seems to only be realtime ...
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1answer
29 views

Bitmeter started on server, can't connect remotely

I installed Bitmeter on Ubuntu server and followed the instructions in the FAQ. I Issued bmdb webremoteadmin and sudo bmdb webstart and both command seems successful but It will give an empty response:...
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UFW status is getting problem running iptables

I want to use UFW (version 0.36) but I get this error when running ufw status: ERROR: problem running iptables: Another app is currently holding the xtables lock. Perhaps you want to use the -w option?...
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USB Ethernet adapter randomly disconnecting and reconnecting

USB Ethernet adapter randomly disconnecting and reconnecting I have a USB adapter that works well on a windows machine, but I tried everything to make it work well on Linux. It disconnects, but the ...
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1answer
66 views

Two WiFi Cards/Adapters

I have two WiFi cards connected to my computer but I want to be able to switch between them. When I run lspci | grep Network I see the following: lspci | grep Network 01:00.0 Network controller: Intel ...
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How to start wifi in Recovery - 20.04

Computer boots, goes to grub but ends up stalled on the "/dev/sda1: Clean" page and won't advance. If I choose recovery mode, there are some commands I could use IF I have wifi. But if I ...
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Problem installing mavlink-router for nano pi neo with Ubuntu 16.04.2 LTS

I am a total newb at Mavlink. I follow the installation procedure on the following page https://github.com/mavlink-router/mavlink-router. Using the command $ git submodule update --init --recursive, I ...
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1answer
28 views

How to assign the same static IP to a wired and wireless NIC?

I have a machine (18.04, will be 20.04 at some point) that has a wired NIC as well as a USB card with a wireless one. It is usually connected by cable, but sometimes the cable is disconnected (...
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Airties 2610 Wifi USB Adapter Not Working

I am new to Linux and Ubuntu. I have the ver 20.1 Ubuntu installed. Got almost everything working except the Wifi connection. I have Airties 2610 USB as adapter. There is no linux driver on the ...
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What is the relation between web server like “apache2” and this user www-data? [duplicate]

What is the relation with this user www-data and web server like apache2?
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Run an SSH command at shutdown using systemd

I need to run an ssh command at shutdown/reboot in my Ubuntu 18.04 PC I struggled reading infinite posts pretending to solve this issue but no way. I wrote this service in /etc/systemd/system/mydown....
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Wi-Fi router gateway IP adding as nameserver IP in resolv.conf only works for Pulse secure VPN connectivity

I am using Ubuntu 18.04.5 LTS and trying to connect Pulse secure VPN with default nameserver entries in below resolv.conf file, but unable to connect, it gets connected for second or 2 seconds and ...
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Can't reach gateway ubuntu 16.04.5

I got virtual machine with Ubuntu 16.04 there was performed command chmod -R 777 /. My task is to recover system and reach the internet. My steps where this: I entered recovery mode and did this Fix ...
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Continuous “Temporary failure resolving repositories”

Since I moved country (i.e. to say different location, new network, etc. but same machine) I have problems updating the package list. It does not matter if I run sudo apt-get update or sudo apt update ...
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routing between vmware nat and physical interface

I have my ubuntu box with ip is 192.168.0.31 and macbook laptop whose ip is 192.168.0.111 I installed vmware workstation on ubuntu which created additional virtual interfaces. All VMs in my vmware ...