Questions tagged [networking]

Managing and using network connectivity on a Ubuntu system

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Can't ping or access specific website

I have tried pinging this website: www.epfl.ch or accessing it in my browser on ubunut but I can't. I know as a fact that the website is running since I can access it from my android phone. Also if I ...
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nic interface not enabled by defult on vm on boot

I have headless ubuntu running on vm, not sure what changed recently but vdi images from osboxes.org if installed in vm do not have nic interface enabled. now I have figured out the interface using ...
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Download speed much slower on Ubuntu 20.04 - Intel Wi-FI 6 AX201

I recently purchased Dell Vostro 7000. I am running Ubuntu 20.04 with kernel version 5.8.0-50-generic. I immediately discovered, that the download speed on wi-fi tends to be 5-10x slower, than on my ...
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My mdns address myhost.local mistakenly bound to Docker virtual network, not my wifi network

TL;DR: How can I get myhost.local to resolve to my wifi interface rather than the Docker virtual network? My desktop system's hostname is "myhost" (from /etc/hostname etc), running Ubuntu 18....
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VPN disconnects Internet and doesn't connect to the server

I have a problem with OpenVPN. Once it's on, it: a) immediately disconnects the Internet; b) doesn't connect to the server. I've tried both GUI and terminal versions, but they didn't work -> ...
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Network manager problem. After reboot another eth0 is created

I use LTE mobile modem to get internet. I wanted to share it via a LAN cable. Couple of clicks in NM and it works fine. I used script to automaticlly connect to mobile network after reboot. I changed ...
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19 views

Cannot connect to ubuntu folder in windows

What is the command in Ubuntu to display folder permissions The pathway to the folder in ubuntu is /home/username/nameoffolder I use the ls command and the result says Total 0 I suppose that means ...
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This configuration file is essential to DNS resolution?

# /etc/nsswitch.conf # # Example configuration of GNU Name Service Switch functionality. # If you have the `glibc-doc-reference' and `info' packages installed, try: # `info libc "Name Service ...
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Extremely slow Ethernet download r8168

How do I fix my slow ethernet download speed? Kernel: 5.11.0-16 Ethernet controller: Realtek RTL8111/8168/8411 Ethernet download speed is between 7-10 Mbit/s, upload is 50-53 Mbit/s. Wifi download ...
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48 views

No traffic flows through Wireguard on Ubuntu 20.04.2

I've been using Wireguard as a VPN on my RPi 4B for a while now, and this week I noticed it ain't working anymore. By not working I mean it connects but no traffic flows through. I reinstalled pivpn a ...
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Excessive network usage after restart

I've noticed this for a while, and cant figure out for the life of me what is happening here. I've looked around on the internet and didn't find anything releated to this, so here I am. I am using the ...
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Speeding 21.04 server boot by specifying network config

I recently installed server 21.04 on some new hardware. I'm using it at home, mostly for some dev experiments. I don't understand everything that happens when the system is booted, but it takes much ...
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I can’t connect to SSH

So a few days ago my ssh stopped working. It worked fine for a few days after I bought my vps. I tried everything, disabled the firewall, check the network (is working) but nothing to do. I can’t ...
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How to connect Ubuntu Server 20.04 to android tethering usb using netplan?

I don't know how to connect my laptop with ubuntu server 20.04 to my Samsung's tethering USB using netplan, someone that can help me? thanks.
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Active Directory with Jetson Nano

I am trying to get my Jetson Nano 4gb to authenticate users via a trusted Active Directory. The network has two domains: the local domain (local.example.com), which the Jetson Nano is directly ...
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glusterfs CTDB Samba - Windows permissions ACLs

I have a testsetup consisting of two (three) nodes, 1 brick and a testshare. The files are replicating and I see the files in every node. I set up CTDB and added the cluster to the Active Directory. ...
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Network 180x slower than Windows or VPN solution

I am having extremely low speed for AWS downloads on Ubuntu and I started to investigate. Here is what I found: OS Configuration S3 AWS eu-west-1 Oookla Speedtest Download Ubuntu 20.10 Kernel 5.8.0-...
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How to use wpa_supplicant for Wi-Fi configuration in Ubuntu 20.10?

I have a system with Ubuntu 20.10, kernel 5.11 with the Intel AX-210 Wi-Fi NIC with iwlwifi-ty-59.601f3a66.0.tgz driver. I've found that Network Manager currently does not support WPA3 and OWE (...
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Ubuntu 21.04 Intermittently no Wi-Fi adapter found

I have been looking through askubuntu for similar issues and have found some useful tips but nothing appears to quite match the problem I am having since upgrading to Ubuntu 21.04 and I am actually ...
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24 views

VPN Connection failed on Network Manager - Ubuntu Groovy - OpenVPN AWS

I am having to troubleshoot attaching OpenVPN AWS .ovpn file to my ubuntu 20.10 Network Manager. I tried troubleshooting using these articles: How can I troubleshoot “VPN Connection Failed”? VPN ...
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24 views

Destination Host Unreachable when pinging but the laptop is connected to internet and its visible to the ISP modem

I have a PC and a laptop connected to the local network. Both have Ubuntu 18.04.4 Desktop, and both are visible to the modem: But when I try to ping the laptop from the pc it says: Destination Host ...
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Problems with TPLink TL-WN823N V2 on ubuntu 20.04

I bought the wifi adapter wn823n v2 from tplink, but for some weird reason I can't install it. When I follow the instructions laid out in the installation guide, and follow the make and make clean ...
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Custom image doesn't connect to the network

A long time ago, I made this script: https://github.com/Caprice-Linux/live_image and It worked fine with Debian. A few days ago, I tested it with Ubuntu, it was really fine, but with a big problem :) ...
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Reaching a Docker environment running in VMware from LAN

Here is my setup: I have a Ubuntu 20.04.2 LTS machine running in VMware (vSphere client). On this machine, I have a local Drupal website running in Docker using Wodby Docker4Drupal https://github.com/...
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Stuck proxy settings in Ubuntu 20.04

I set proxy settings back when I was connected to the office via VPN, but they got stuck somehow and I cannot remove them. What I checked and tried: ~/.bashrc - nothing here /etc/environment - ...
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I cannot ping outside the network

I used Oracle VM VirtualBox to host a Ubuntu Server 20.04. The network is set to Bridged Adapter. sudo nano /etc/netplan/00-installer-config.yaml: network: ethernets: enp0s3: addresses: ...
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How to set up a local DNS-over-TLS service for private LAN and Android devices

Goal: Allow my Android devices to see my local LAN DNS names I'd like to set up a local DNS-over-TLS resolver (Ubuntu or RPi) to support my non-rooted Android devices to resolve my local systems. ...
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Wake On Lan not working in Ubuntu 20.04

I'm trying to set up wol on a laptop connected to a tp-link adapter by an ethernet cable. The PC that sends the magic packet is also connected to this adapter. I've already followed this to enable wol ...
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2answers
28 views

Import Windows DHCP leases into a Linux DHCP Server

I'm replacing a Windows DHCP server with an Ubuntu server. I need to migrate leases in the new DHCP. What would be the easiest solution? Create reservation in my dhcp.conf? (I would prefer have only ...
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30 views

Getting a new usb wifi dongle working, old one still works?

I am trying to get a BrosTrend ac1200 working on 20.04. Have currently been using TPlink AC1300 T4UH. The old one still works. I have had to install and re-install the drivers for the TPLink a number ...
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How to use usb.modeswtich to turn my 4G dongle from mass storage mode to modem mode?

I am a complete linux and ubuntu noob, but I can follow instructions.. I just can't find a working solution to this problem online. Everything I try doesn't really seem to work. Running Ubuntu 20.04.2 ...
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How to understand why ipsec and gre doesn't encapsulate traffic ? I wan't both

ip tunnel add ipsec0 local (my laptop after phone modem) 193.168.48.221 remote 196.196.196.20 (NordVpn server) mode gre ip link set ipsec0 up ip route add (my SPI's ip) 10.6.0.1/32 dev ipsec0 After ...
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Lenovo Legion Y530 wifi-card not detected on Ubuntu 18.04

as the title says my problem is that the wifi card is not detected and I do not know how to solve this. Here is the output of lspci -knn | grep Net -A3; rfkill list 07:00.0 Network controller [0280]: ...
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How to route from an IP in specific range to another IP in different range?

I Need to Route from an IP for example 10.4.4.5 to another IP in Different Range 10.4.6.6. How can I do This in Ubuntu? Thanks
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79 views

No Wifi after upgrade from 16.04 to 18.04

since 16.04 reached EOL I wanted to upgrade to 18.04 but after automatically restarting at the end of the upgrade, my laptop (Dell XPS 13 9360) did not connect to the internet. The wifi settings state ...
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How to make routing persistent for multiple NICs in Ubuntu Server 20.04 with netplan?

I'm trying to set up the routing for my server to different public IP addresses. The configuration of my first network works fine. The second is also configured with the right static IP after boot. I ...
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3answers
123 views

No internet access after upgrading to lubuntu 21.04

I have upgraded my lubuntu from 20.10 to 21.04 and then I have no access to internet even though my laptop is connected to wifi. I have tried to set dns in /etc/resolv.conf but to no avail. Some ...
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On a ubuntu 18.04 with two NICs, one NIC's ip always fails to ssh the connection

There are two NICs in my VM. The os of VM is 18.04. The content of 01-network-manager-all.yaml is : it@it51:~$ cat /etc/netplan/01-network-manager-all.yaml # Let NetworkManager manage all devices on ...
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Connecting to password protected samba on Dolphin errors, `Connection to host 192.168.11.1 is broken.`

I am trying to connect to a samba. Apparently I was given a username and password, and that according to tutorials, that if I merely place this in, I should be prompted with a username and password ...
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21 views

How to stop autoconnection to usb ethernet on every reboot?

How can i stop ubuntu from trying to connect to usb ethernet on every boot . I keep removing the "automatic" connection but it always reset itself, i've tried all the commands in the other ...
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Why get I a NET::ERR_CERT_AUTHORITY_INVALID error in virtualbox guest system when i use a vpn on the host system?

When im brwosing on my virtualbox guest system (Win 10), im getting a NET::ERR_CERT_AUTHORITY_INVALID error. On my host system (Ubuntu) everything works fine. As network setting i configured NAT. I ...
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Accesing home network over Internet using my domain name with Dynamic DNS

I have a Raspberry PI with a Samba, FTP, DLNA and Webserver. I wish to access it trough ssh and web with my domain like: ssh username@my-domain.hu and like: home.my-domain.hu the problem is I do not ...
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windows laptop cant connect to ubuntu 20.04 hotspot

(my android phone can connect to the ubuntu hot-spot without any issue) when i try to connect my windows laptop to the hot-spot it says to "enter the pin from the router label". since from ...
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None of my traffic is going through openvpn. How do I solve that?

I've properly (or probably not) set up openvpn on my linux client machine. Both the server and the client can see each other. My problem is that none of the traffic, browser for example, is going ...
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3answers
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Dropbear installation in Ubuntu

I have an assignment to work with Dropbear for SSH connection. First I need to download, configure and install Dropbear. I downloaded it from https://matt.ucc.asn.au/dropbear/ I did: ./config make ...
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Bluetooth fails to connect on Xubuntu 20.04

I am trying to connect my Galaxy Buds to my XPS 9343 on Xubuntu 20.04. Using the notification area widget, I get Connection Failed: Host is down From the terminal I get Failed to connect: org.bluez....
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FileZilla slowly creeping up or down transfer rate, plus other weird behaviour

I am not sure the issue is related with my current Ubuntu, it might. I am connecting with FileZilla the present laptop, with Ubuntu 20.04, as a client, to another desktop Win 10 PC (with a USB WiFi ...
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153 views

Why aren't the stock and mainline kernels supporting Intel onboard graphics when the 20.04b kernel does? Z590 motherboard 11th gen i9 11900k

EDIT: Problem with display has been narrowed down to dual montitors. System will only boot into both monitors on the OEM kernel listed below. For ALL other kernels, including 5.12.2, and the latest ...
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iptables - help me figure out if my forwarding scheme is correct?

I want to forward everything from wlan0 to tun0, and everything from tun0 to wlan0. Using sudo iptables -S command, the output is:(assuming this is the actual rule of my iptable) -P INPUT ACCEPT -P ...
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Purge IPFS 100%

I'm trying to remove IPFS from my Ubuntu 20.04 system. I have: Removed the config files at /root/.ipfs Remove the ipfs binary at /usr/bin/local Blocked udp 4001 on iptables However, after checking ...