Questions tagged [networking]

Managing and using network connectivity on a Ubuntu system

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Join local network ubuntu

can anyone help me, how to join local network(hardisk for foldersharing) on windows it is easy but can anyone help me to do it on ubuntu ? I already installed Simba but it is not working, is there any ...
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something weird happened to sshd. can only access through local network

Long story short: from one day to another I can't access to my server remotely through SSH. ssh: connect to host "MY SERVER STATIC IP" port 22: Connection refused I can access through the ...
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Ethernet cannot connect

I don't have external WiFi and ethernet is my only source. I can't copy and paste anything since I am on a MacBook at the time of writing this. My other PC is running into this issue (Ubuntu 20 + 21). ...
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WiFi network suddenly disabled

First time poster in this community and a relatively new Linux user (i.e. high-level explanations are super helpful). System and Hardware Ubuntu 20.04.2 LTS WiFi Card: Intel Wireless-AC 9260 Logical ...
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Ubuntu network interfaces

So on my laptop I have two interfaces enp1s0 and wlp2s0 and if I want to use either one of them I have to run ifconfig x down on the other. For example if I don't do that to enp1s0, it shows that I'm ...
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no route to host when mounting CIFS share

We have two ubuntu machines running docker + kubernetes and they need to access a windows share. The first one is setup in /etc/fstab : //dfs/Archive01 /mnt/dfs cifs rw,cred=/etc/cifspasswd,forceuid,...
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Ubuntu 20.04.2 Ethernet Disconnects on System Resume

On system resume from suspend, ethernet remains briefly connected and connections can be made. After about 5-10s, the device disconnects and automatically reconnects. Since the connection is already ...
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Ubuntu 20.04 cannot find any drivers for my MacBook

I recently wiped my hard drive and installed Ubuntu 20.04 on my MacBook from early 2009, however my wifi and graphics drivers were not preinstalled (even though I clicked on the install 3rd party ...
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Port redirection while blocking the dest-port externally

This might be simple but after spending ~5 hours w/ iptables and googling, I couldn't make it work, so I thought I'll ask here directly. I have an ubuntu machine with Docker installed (so it ...
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ERROR: not connected to the gnome-3-28-1804 content interface

I'm using Ubuntu 20.4.2 LTS. $ sudo snap install chromium INFO Waiting for automatic snapd restart... error: cannot perform the following tasks: - Buscar e verificar asserções ...
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multiple sites in apache2 aren't working

Hello everyone I need help, I am trying to create two local sites in my docker container with Ubuntu bom.com and bom2.com with article << https://www.liquidweb.com/kb/configure-apache-virtual-...
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Using iptables to block all internet-originating traffic except for a specific port

I have an Emby server running on Ubuntu Server 20.04 LTS and would like to configure iptables to block all incoming connections from the internet except for port 8920, but allow normal incoming ...
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Why is broadband so slow

I have a new Lenovo laptop running ubuntu. My old Windows 7 laptop gives me download speeds up to 65 mbs download on my virgin wifi. My new Ubuntu laptop gives me 4 mbs download at best and 3.5 mbs ...
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Desperate, attempt to install iRedMail, now xrdp blocked

Please help! I have a semi testing machine: Ubuntu 20.04.2 with gui, virtualbox and other stuff to play with. At startup windows guest loads just to show home security camera. Whenever I want to "...
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What is the purpose of Netplan in Ubuntu? [duplicate]

Recently I've decided to find out how to configure the network in Ubuntu 20.04. Several years ago I used /etc/network/interfaces for this purpose, but now everything changed. As I've found for Ubuntu ...
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No internet, but local network works

For some reason every time I set up a new ubuntu server (for our build agents) I mange to mess it up and have some problem with network. Note that this machine was set up 1 hour ago (then I tried to ...
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Whitelist URLs in Ubuntu 18.04

I'm installing an application server on Ubuntu 18.04 and the install manual requires whitelisting a number of URLs. How to do this in a fresh installed Ubuntu 18.04? Please whitelist the following ...
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Change an Ubuntu 18.04 VM to a server that a client can get files from it and run them?

I have an assignment that asks to make a server that when a client connects to it, the client must check for new version of an app, and if the version of the app that locates of server is newer that ...
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Can I bridge (same subnet) my wifi (hotspot, not client) to wired LAN using NetworkManager?

Setup: I have an Ubuntu box with 2 wired ports (WAN and LAN) and WiFi. My goal is simple: I just want the box to behave as a firewall/router (with NAT) from the WAN to the LAN+WiFi, where the latter ...
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Windows Installer in WINE cannot connect to network

I'm trying to install the Spitfire Audio App for use in my DAW. I can run wine SpitfireAudioWinSetup-3.2.0.exe and the installer wizard pops up just fine. After going through all the installation ...
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Samba Share on Pi – Windows & Linux can write but not applications (Sublime, Codeblocks)

Context (irrelevant): I was looking around the net and stack for this particular issue but couldn't find an answer. Some answers even suggested enabling guest_ok which is in my honest opinion a ...
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Ping and web requests have slow “startup” yet DNS, latency and speed tests are fast?

So the key symptom that makes me suspicious is that ping takes about a second or so to start printing when I run it on Ubuntu and starts almost immediately on an OSX laptop (I don't have ubuntu on a ...
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Ubuntu 20.04 Slack 4.15.0 not using system proxy on VPN

When on my vpn (connected with openconnect), I require an http proxy to access the internet. I have the system proxy configured to use wpad, and I know this works because firefox is set to use the ...
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`Error: Wireless interface (wlp2s0) IP configuration was unavailable` on Kubuntu 20.04 LTS

I have a problem connecting to my wi-fi extender (TP-Link WA850RE). I configured it so that its SSID is different from the "original" router. The SSID is not the problem. The range of the ...
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Cannot interact with my Raspberry Pi running 20.10 from Ubuntu computer but I can do it with a Mac

I recently distro-hopped from Raspbian to Ubuntu MATE 20.10 and I enabled the SSH service. I can connect it from a Mac (not with Ubuntu), but it doesn't even allow interactions from my computer. ...
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Wireguard no internet on ubuntu but works fine for the very same config on my android phone and on windows 10

I'm using ubuntu 20.04 for both the server and the client and have used an EC2 AWS instance for the server. I've also used this installer for installing wireguard on AWS: https://github.com/pprometey/...
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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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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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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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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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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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