Questions tagged [networking]

Managing and using network connectivity on a Ubuntu system

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How to troubleshoot unstable wireless after updating to 22.04?

I'm not sure exactly which update did me in, but wifi is super spotty now--it'll work for a bit then randomly disconnect. I don't have this problem when I boot into Windows, but it's been happening in ...
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Network periodically disconnects with "Reason: 2=PREV_AUTH_NOT_VALID"

I'm running Kubuntu 22.04. I use and connect to a TP-Link Wifi Extender to increase my network speeds. Historically, I've run into problems with this - NetworkManager's built-in DHCP client completely ...
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Ubuntu file sharing permission issues

I'm having issues trying to set up file sharing on my Ubuntu PC. Recently my wife has upgraded her PC to an iMac, and I have taken possession of the PC. I installed Ubuntu 22.04 on the PC. Now my wife ...
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Video streaming between two linux machines over the internet

I've been struggling with a question for more than one week, how to create a streaming service between two machines running Ubuntu and stream content over the internet using an encrypted UDP ...
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Ubuntu 22.04 connect to wifi or wired and .... But not have network connection

In ubuntu 22.04 I can connect to wifi or wired and ... But not have network connection I read other question but not help to solve it I'm beginer and not change any file in system but I don't know ...
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Ubuntu 22.04 has exremely slow wifi

I recently faced this problem with my wireless home network. From wifi speed tests on other devices, I expect to get 6Mb/s, while on my laptop with 22.04 (Linux 5.15.0-40-generic) the speed ranges ...
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How to use my existing windows server 2016 r2 standard active directory to authenticate samba share on ubuntu 22.04LTS Desktop acting as sambaserver?

I have a windows server 2016 r2 standard DC with AD DS setup, I am building a samba server on the latest Ubuntu 22.04LTS Desktop. I need to create samba share on the ubuntu and use the active ...
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Viber no internet connection on ubuntu 22.04

I installed the Viber application on my Lenovo x1 carbon 3rd gen laptop. But when I opened the Viber application, there was a "no internet connection warning" message showing me. Please give ...
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How do I install Ubuntu using VMware on Windows 10? [duplicate]

Does anyone know about this? I need help. So that I can install Ubuntu using Vmware on my windows 10.
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How to prevent my computer from connecting to a specific site

I recently decided to make the switch to Ubuntu. And I had a question pertaining to site connections. Before beginning, I need to give some context. I am/was addicted to youtube. I think at my peak in ...
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Netifaces gives KeyError: 2 while running from cron

I want to schedule a cron job for running a server client application during startup. What I did is crontab -e and then put the following line @reboot cd path/to/folder && /usr/bin/sh /home/...
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Troubleshooting Linux Router Access [closed]

The backup server tries to access the production server through SSH, but a router problem occurs. Ping is also unable to shoot the operating server, so if you know how to solve the Linux router ...
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Can't connect to wifi after changing the wifi router

I recently changed my router. The new router has 2g and 5g feature. I configured it with the same name. But there is an awkward situation here. My laptop can't find the 2g but it is working on 5g. ...
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How to transfer files to my Ubuntu Home Server

Im a completely at a loss I got a homeserver running Ubuntu Server i have 2 games running on it Terraria/valheim I am trying to transfer savegame data from my mac(client) to my Linux(server) I thought ...
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Why is Ubuntu 20.04.3 internet access not working?

My Ubuntu OS is connected to the my working internet network, but any internet-reliant services have not been functioning properly. This includes downloading anything (including any packages from the ...
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How do I cut using the delimiter? [closed]

Can someone help me to use cut command to remove daemon.warning below? Jun 23 15:10:47 MC41241492 daemon.warning [vrrpd] VRRP:state_init Jun 23 15:10:47 MC41241492 daemon.warning [vrrpd] VRRP ID 255 ...
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Connecting to multiple Windows RDP via Ubuntu Server

I'm sorry but i always trying to find solutions, search forums etc. but first time i'm lost. This should be easy :( but soo far i fail, maybe i can't comprehend some topics. I have Ubuntu Server 22.04 ...
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phpMyAdmin under natted port: how to avoid redirect to port 80?

Situtation We have a firewall exposing a 192.168.x.y:80 as public_ip:10080 We configured nginx to listen to 80. We created a domani pointing to public ip accessing to main domain at 10080 serves ...
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Wifi Adapter not Found for Ubuntu 18.04 Lenovo v14-ADA

I have tried many approach to install driver for my laptop, but still nothing have worked. First I try to find my network controller by hitting lspci, then the output came as follows, Network ...
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Ubuntu 22.04 hostname not detected from DNS

I have been having an issue with Ubuntu 22.04 not detecting the hostname from the DNS server. I have tried using both the networkd and NetworkManager backends and the server's hostname still appears ...
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any way to route IP to IP traffix in linux

source server has two IPs 192.168.100.1 192.168.100.2 And CS has 192.168.200.1 192.168.200.2 Route like this based on destination. 192.168.200.1 -> 192.168.100.1 192.168.200.2 -> 192.168.100.2
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NIC Teaming in Ubuntu 20.04 LTS

I'm naive to Linux flavours (like Ubuntu, Centos, etc). I've been googling on how to setup NIC teaming in Ubuntu 20.04 LTS, reading mostly using /etc/network/interfaces. But, I couldn't find '...
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Samba (failed to authinticate user)

Until resently i had no problem using samba server, but now it is glitching. I tried creating new user for samba, remounting drives on PC (windows 10) and i keep getting error 0x80070043 on windows ...
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Avahi on multi-hop network

I have a multi-hop network and I need to discover the topology of the network from a system which is connected to one of the network elements. My question here is, can I use Avahi for such multi-hop ...
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Where does systemd-networkd keep DHCP leases when acting as DHCPServer?

I've got an ubuntu 22.04 system as my home router/firewall, and I use systemd-networkd as the DHCP server for the LANs. I have pihole running in a container providing DNS, with the upstream DNS is a ...
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sub-interface on ubuntu 20.04

I would like to add a subinterface on ens192. I don't have a problem setting and using with 2nd or 3rd IP on the same interface. When I am trying to set a subinterface validation has passed on the ...
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Lubuntu 22.04 no wifi [duplicate]

Firefox and chromium installed with various flavors of Ubuntu causes our old iMac to crash, except on Lubuntu which did not cause a crash. However, lo shows disabled through the nm-tray debug info. nm-...
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No network driver, ubuntu 20.04.4 server

I tried to install network driver on my newest motherboard, but unable to. Please help. Motherboard: ASUS PRIME Z690-P WIFI D4 Ubuntu: 20.04.4 server Picture of fault
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Cannot access my localhost from any IP address while localhost and 127.0.0.1 can

I am very tired because after completing the web application, I can access it through 127.0.0.1 only. I have a VMware machine with Ubuntu 20.04 IP Address ens33: flags=4163<UP,BROADCAST,RUNNING,...
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What is the detailed process of bringing up a network interface in Ubuntu 20.04 Server?

Exactly what is the process on bringing up an interface in Ubuntu 20.04? i.e Which process manages this? (Is it systemd-networkd?) And what configuration data does it base this on? Note: I'm not ...
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Ubuntu 22.04 LTS: Wireless connection issue while on external HDMI-Monitor

I sometimes have network issues (no signal, slow upload, etc.) and I think I finally can reproduce them: I noticed a strange behavior between my wifi and my external HDMI port / monitor. Configuration ...
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Is there defined behavior for multiple IPs on the same interface within the same subnet? [closed]

Say I do sudo ip addr add 10.0.0.1/8 dev eth0 and then sudo ip addr add 10.0.0.2/8 dev eth0 then try to ping some other host also on the same subnet, say 10.0.0.3. Is there a defined behavior for ...
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Qualcomm Atheros QCA6174 on Samsung Galaxy Book 12 - No wifi

I've just installed Xubuntu 22.04 on a Samsung Galaxy Book 12 with Qualcomm Atheros QCA6174 and it doesn't work. (Also does not work with Kali 2022.2) the output of the commands are identical on both ...
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ICMP Redirect Enabled - Rapid 7 Scan

As part of Rapid 7 scan its reported that ICMP redirection enabled, popped up. Want to check whether this can be ignored or False Positive
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Wired Connection icon in the top bar shows often the "Questionmark" [duplicate]

Ubuntu 20.04 on 2 Systems. Since approximately 2 weeks, the wired connection icon shows a "Question mark" sometimes on both systems. I "ignore" it, initiate a network transmission (...
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How do I share or forward a network share?

I have a setup where I have a NAS disk that is mounted on the Ubuntu machine and I have hamachi installed on that machine. I need to forward the NAS share so that when I browse the IP of the ubuntu ...
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Can not access my website (only) from my local machine

Here a weird situation ... My website is accessible from any machine except my local machine, i.e. my machine where my server Apache is installed. I can't figure it out : when I type my website from ...
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Does Ubuntu automatically boot when near a source of internet (router, phone data)

Looking at the "last" command, I see that my laptop booted up a few times in the past couple months, one time for six hours. It was sitting in an empty place, and I noticed that every time ...
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Quectel EM120R_GL modem seems to work but SIM missing or not detected

This card has two SIMs, SIM0 (or whatever number) and SIM1. SIM0 is eSIM and the default SIM, SIM1 is physical SIM inside the slot. You need switch SIM0 to SIM1. This issue has been discussed before. ...
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Help with netplan and 2 LANs on Server v22.04

I'm running Ubuntu server v22.04 with 2 NICs - one facing the ISP and one facing the local LAN and is intended to be a media server for the local LAN and the interface between the LAN and WAN. The ...
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Ubuntu Server 22.04 persistent network settings

I have Ubuntu 22.04 installed. I kept getting dropped packets warning from Netdata. After running; ethtool -g eno1 Ring parameters for eno1: Pre-set maximums: RX: ...
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Ubuntu 22.04 shared internet connection with multiple interfaces

I use Lubuntu 22.04 LTS with Cinnamon desktop to be precise. I have one network device with a single interface on my motherboard. enp5s0 is the one connected with my ISP-router, with fixed IP 192.168....
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TP-Link Archer T2U Plus usb wi-fi dongle is not working on Kubuntu 20.04.4

I bought a TP-Link Archer T2U Plus usb wi-fi dongle. I cannot get it to work on Kubuntu 20.04.4.What I tried so far: Open the terminal and execute the following commands : Update the package ...
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Cloned Ubuntu VMs in vSphere get same IP, despite resetting /etc/machine && /var/lib/dbus/machine-id

vSphere 7.0 + Ubuntu 18 / 20 (tried both) I am trying the steps from this blog post: https://blah.cloud/kubernetes/creating-an-ubuntu-18-04-lts-cloud-image-for-cloning-on-vmware/ I also tried this ...
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-3 votes
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Is display output over CAT6 cable possible? [closed]

Having my Asus PN51, AMD GPU, Linux Mint v20.3 PC display output directly connected to my living room LG SmartTV HDMI port allows me to see YT videos without ads. I would now like to have the same ...
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22.04 - macvlan module missing?

I am trying to copy some lxd containers from a raspberry pi running Ubuntu 20.04 to a raspberry pi running 22.04. The containers use macvlan, which produces the following error if I try to run the ...
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Translating RedHat network settings to Netplan (Ubuntu 22.04)

Update: It seems it was an issue with the load balancer settings. It is now working with the configuration I show below. Question: I need to translate these instructions for RedHat into netplan ...
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Server - Dynamic ipv6 on boot, despite Netplan config stating static

My server is a VPS running Ubuntu Server 20.04.4. My Netplan Config states a static ipv4 and ipv6. However upon boot, ip addr show shows: 2: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 ...
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Lost WiFi after install of 22.04

Once again after upgrading to Ubuntu 22.04 the Wifi won't connect. I have both RaLink and Realtek adapters and usually Ubuntu won't connect to the Realtek adapter after an upgrade. This time, it won't ...
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UFW Blocking Established TFTP COnnection

I am setting up a Fog server and got everything working as it should. However, when I enable UFW I am not able to transfer the image over TFTP. I have a rule allowing port 69, and the connection is ...
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