Questions tagged [networking]

Managing and using network connectivity on a Ubuntu system

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Ubuntu 20.04 - Cannot connect to public wifi networks

I'm using Ubuntu 20.04 on my Lenovo laptop, and cannot connect to public Wifi networks anymore (I used to be able about 6 months ago). However, I can connect to any network with a password without ...
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Having issues with Putty

First, I want to say that I have decided to make the switch completely to be a Linux user now. So what I am about to say very much well could be a user error issue. I have installed PuTTY onto Ubuntu ...
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Periodically, dhcp4 trashes my wifi adapter's IP address

A few times a day, I lose WiFi connectivity. When I have connectivity, the IP address of my wifi adaper is 192.168.0.93. When I don't have connectivity, the address is 172.20.20.20. syslog shows ...
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creating two net bridges on one phisical computer

I have two network cards on my computer. I want to create two net bridges with netplan to add this bridged networks to kernel based virtual machines (KVM). Both network cards are connected to the same ...
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my network is unreachable

i'm using ubuntu 20.04 on a virtual machine and i have changed mi ip conf from dymanic to static, but i do not have network connection; the file 00-installer-config.yaml located at /etc/netplan was at ...
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Ubuntu Budgie on Macbook air 2013, no WiFi

So when trying Ubuntu Budgie on this, the WiFi doesn’t automatically install, I have to go to Additional Drivers and tell it to use the proprietary driver. No problem there. So then I install and tell ...
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20.04 no internet , DNS sys broken, troubleshooting/solution req:

As in header 20.04.3 , LTS had internet and all, after reboot no more internet ping test: 127.0.0.1 is ok, 127.0.0.52 is ok (local resolvd something) gateway IP is ok (confirming the net towards ...
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NIC Copper Link is Down

Im seeing the below error [7483226.934281] bnx2 0000:01:00.0 en01: NIC Copper Link is Down in Linux server. Also the Sudo Terminal or console for command prompt is not visible in Ubuntu. I need to ...
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No carrier on Marvell Yukon 88E8057 based on-board Ethernet (20.04+)

Greets. Trying to install Ubuntu 20.04.3 on a Shuttle SX58J3 computer. This is a Intel X58 + ICH10R based Core i7 box with two Marvell Yukon 88E8057 on-board Ethernet ports. They're detected OK, the ...
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UFW Unblock Host to Guest Traffic

I am on Ubuntu 20.04 and I have enable UFW as a killswitch to work with my wireguard vpn. My current rules work perfectly, except that traffic between my ubuntu host and my debian 10.5 virtualbox ...
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Files become read-only when adding files to a Samba share between Ubuntu and Windows

I'm very green with Linux/Ubuntu in general so please forgive me. I'm trying to setup a shared network folder so I can copy over files from my Windows PC without needing to use a physical drive. I ...
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Intel Wi-Fi 6 AX200 not recognized after kernel update

I just wanted to post this here in case anybody else has this issue. After updating to 5.13 my wifi adapter wasn't being recognized, so I just rolled it back to 5.11 using grub and it works again. yay!...
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Network Manager settings not sticking after reboot

I'm attempting to automatically establish a VPN connection after reboot. I created the profile via the network manager GUI and everything works well. I can use nm-connection-editor to edit the ...
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Configuring VLAN QoS Mapping through netplan

I am trying to setup a VLAN via netplan with a specific QoS mapping so that I can prioritize traffic through that (virtual) interface. However, I cannot seem to find any way to do that given the ...
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Disable NetworkManager. Use netplan.io with Ubuntu 18.0.4

edit: I found it may be more efficient to reinstall the OS. I may encounter this again so I'll either create a new issue or find a way to continue this one. Also note below I created a bug report on ...
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two IPs and two gateways on one interface in bridge configuration with netplan on Ubuntu 20.04

I have a Hetzner dedicated server with single network card and two public IP addresses (both IPs have its own gateway). Right know it has only one address configured with neplan. Below is my config ...
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How to open a remote samba shared folder? (from ubuntu to ubuntu)

I am sharing a folder on my ubuntu 20.04 machine using samba. I access the folder from my windows 10 machine. Now, I want to access the folder from my ubuntu 18.04 notebook. I searched the net but ...
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Can't connect to Readyshare on Netgear Router

I am unable to connect from the file manager in 20.04 running on a thumbdrive. I have 18.04 installed on another laptop and the Readyshare drive appears in the filemanager with no intervention on my ...
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Razor Blade Pro 17 Wi-fi card not working Ubuntu 20.04.3

A fresh install of ubuntu 20.04.3 in a Razor Blade Pro 17 laptop, the wifi card never showed up. kernel is (uname -a) : Linux Razor 5.11.0-41-generic #45~20.04.1-Ubuntu SMP Wed Nov 10 10:20:10 UTC ...
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System Management with ergress firewall filtering

I have a contractor that manages firewall and security. They are moving moving to egress web filtering. I am all for security, but I have a few months to make sure that this does not break my toys......
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NetworkManager deleted WWAN System Connection?

I've created a custom File and put it in etc/NetworkManager/system-connection/ for using LTE in a IoT-Device. [connection] id=cel-1 type=gsm interface-name=cdc-wdm0 permissions= [gsm] apn=internet....
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MAC address filtering based on manufacter ID

Good morning, I'm going to implement a DHCP server that needs to accomplish following configuration: it will manage 3 sub-network from base 192.168.xxx.0/26, so I'll have 4 networks. the DHCP server, ...
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Fail2Ban vulnerability after reboot

I am very happy with fail2ban for protecting my server except for one issue. After a reboot, each banned ip address is added to iptables one at a time. On one server, I have about 7500 permanently ...
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Unknown computer called ATP on my network

There is a 'computer' which shows up on the network with the name ATP. I thought it was the disk attached to my router, but couldn't log in with any of my usual passwords and atp is not in my ...
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How to get the network interface through which traffic is routed

I am trying to figure out through which interface my traffic is routed and to get the local ip address associated with that interface. This will make me differ between cases where vpn access is ...
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Drivers not working after Update to 5.4.0-1059-aws

Since I updated my system to 5.4.0-1059-aws my hardware is not working anymore. (Same is for the update to 5.4.0-1060-aws). The last version, everything was working, is 5.4.0-1057-gcp. What is working:...
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WiFi adapter not found ubuntu 21.10

Since a while back, I've had issues with my wifi. It started a month ago when I was using ubuntu 20.04. I've updated to ubuntu 21.10 since but the issue remains. The problem is that the wifi abruptly ...
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How to cut electricity to USB dongle

is the Huawei E3372 LTE USB stick unlocked, I have a sim inserted in the dongle. The thing is to completely turn off the device to change the external IP of the sim. When I unplug and plug again the ...
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How add group write permissions for a mounted shared directory? (client/server case)

I have a MacOS with a shared directory. I am able to access in Ubuntu Linux with: # From Linux to MacOS sudo mount -t cifs //192.168.1.X/directory_shared /mnt/192.168.1.X/...
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Intel Ethernet not working, 20.04

Dell Latitude 3340, Wifi working but ethernet connection not. It does work on the same machine when booting into the Windows partition. Disabled "Fast Startup" in Windows Tried updating the ...
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The Remmina application shows an error about connecting to the remote desktop server

Hello! When i want to connect to my Virtual Dedicated Server, where i have installed Debian Desktop Server, version 11 via. Remmina application, the application will show me this error: `Cannot ...
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+50

Wireguard client can not connect to internet

I have installed Wireguard with following commands: sudo apt update sudo apt install wireguard Then I have installed resolvconf: sudo apt install resolvconf Created keys: umask 077 wg genkey | sudo ...
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enp0s25 interface keeps reappearing in Ubuntu 20.04.03 LTS

I've just started seeing something odd in my system (Ubuntu 20.04.03 LTS). I've got a hardwired connection to my system, and noticed in the past few days that I see the interface enp0s25 as one of my ...
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Failed to raise network interfaces debian [closed]

network interface This has never happend to me before , my ip addresses do not work , im not sure why this is happening , I have linked my network interfaces and I really need help , I even set my ip ...
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56 views

TP-Link AX3000 PCIe WiFi Card not appearing in lspci

I just installed a TP-Link Archer TX3000E AX3000 PCIe Wifi Card in my PC. However, my PC doesn't recognize that the card is installed. Not that it can't connect to wifi, but that the card doesn't ...
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My teacher took marks off last time beacause of this and I am kind of confused on ip address and leading zeros [closed]

Configure 21c-Project VM to be a reboot persistent gateway to your internal network. Use network address 192.168.Y.24/29 (where Y is second and third digits of your student ID, for example: student ID ...
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54 views

How do I set a static IP in Ubuntu 20.04.3 LTS?

I'm trying to set up a lab computer as a ssh server following this guide. One of the steps is setting up a static IP address. So, I was glad to find this answer. Following it, I created /etc/netplan/...
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systemd-resolve not apply settings based on network interface

I want to config systemd-resolve for working with different dns servers based on network interface. But when I create config un the /etc/systemd/network/tun.network nothing is happen. My tun.network ...
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338 views

SSH Permission Denied

I have a bunch of computers I'm trying to connect to each other with some random router I found lying around. I have all the machines connected to the router and have given them fixed IPs. I have used ...
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AX3000 "No Wifi Adapter Found" but bluetooth works

I just got the AX3000 in and the bluetooth works just fine, however the wifi does not. Oh yeah, I'm running Ubuntu 21.04. I've been using an ethernet cable for a long time now, but I'm now in a ...
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50 views

Samba Server Folder Access not Permitted

I can't seem to get windows to connect to the samba file server (error below). I'm using \ \ip\backup where ip is replaced with the internal ip address. It registers the correct folder but comes back ...
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33 views

Quagga, Zebra routing manager daemon does not start

When I run zebra.service start I get an error saying the unit file changed and it does not start:
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28 views

No wifi adapter found and kernel problem [duplicate]

i have problem. Today i turned on my laptop, and i went to my browser, but i didn't have internet connection. so i went to wifi settings and i saw message, saying No wifi adapter found. And i saw a ...
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Cannot create vpn connection from Network Manager GUI but using CLI still works 20.04

everyone! Why I can create VPN connection only with CLI? I mean, when I run sudo openvpn myconfigfile.ovpn this create vpn connection and everything works fine, but through the Network Manager GUI ...
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Install Intel Wireless Drivers on GP66 Leopard laptop running Ubuntu 20.04

My device can't found any wifi drivers as I turned to Ubuntu 20.04 on my GP66 Leopard with the following devices: anto@anto-GP66-Leopard-11UH:~$ lspci -knn | grep Net -A3; rfkill list 05:00.0 Network ...
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Internal dropouts problems

How can I troubleshoot the internal dropouts? WiFi drops out once few minutes. Few days before the problem started I had some cables for my internet changed by the ones I have a internet contract with....
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62 views

New Ubuntu - Install wireless drivers with no Ethernet available?

The Problem: I'm in Spain and my friend in America is new to Ubuntu and he has a tower pc that he installed Ubuntu Mate on, but then I find out that he has zero access to any ethernet (no friends have ...
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I can access SMB drives from Win10, but not from 20.04

I love Linux, but I'm relatively new to Samba. I have 3 workstations: Win10 Ubuntu 20.04 Ubuntu 16.04 Samba is installed on the 16.04 box with 2 drives shared via smb.conf I can mount the shares in ...
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55 views

Connecting to a Windows machine from a separate, Ubuntu machine on my home network

I have Windows 10 on one machine and Ubuntu 20.04 on another, completely separate machine. They both connect to the internet through my home network. My Windows machine has no problem at all seeing ...
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Wifi Internet speed issue on Ubuntu 20.04.3 LTS

wifi speed via settings Wifi speed checked in browser Before I was hardly getting 1 Mb/s speed on my browser. Later came to know about TLP on this website and installed it. The speed improved a lot ...

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