Questions tagged [networking]

Managing and using network connectivity on a Ubuntu system

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System broke, most things aren't opening

In my system many apps are not working Terminal fails to start and settings disappeared from app menu, I tried searching for settings app in file explorer and there's only one option in it https://i....
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Add Public IP to KVM Virtual Machine on Ubuntu 22.04.1 Server Host

I have a Dedicated Server (Ubuntu 22.04.1 LTS) with five Public IPs as below: xxx.xxx.51.20 (Main Ip) xxx.xxx.198.104 xxx.xxx.198.105 xxx.xxx.198.106 xxx.xxx.198.107 I want to hosts several KVM VM ...
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How to find out the program from iptables log

Testing the ping on ubuntu 22.04: Host A IPv6: 1111:1111:1111:1111:1111:1111:1111:1111 Host B IPv6: 2222:2222:2222:2222:2222:2222:2222:2222 Host A: Now execute a ping from Host A with the following ...
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Temporarily add multiple ip addresses to interface in 22.04

I need to temporarily, dynamically add and remove ip addresses from the netplan.conf (/etc/netplan/myNetplanConfig.conf). In earlier versions the ip command could be used to temporarily add ip ...
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QCA9565 / AR9565 Wireless Network Adapter ASUS vivomini un62

I've installed ubuntu server on my asus vivomini un62, after i've installed also gnome with tasksel. The wifi is working but if i go into the settings i can't see anything for the wifi.screen screen2 ...
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how to override configuration for .net apps

I am trying to manage configurations for some solutions(.sln) especially their appsettings.json files which contain hardcoded IP's. Reason for this is not to get worried if any IP's change. One ...
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Unable setup VLAN mirror on vf port with NIC Intel X710

I want to create another vf port to mirror traffic of 2 vlans. The steps I followed: echo 3 > /sys/class/net/eno1/device/sriov_numvfs ip link set eno1 vf 0 mac 00:11:22:33:44:66 vlan 2 ip link set ...
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"Temporary failure in name resolution" after upgrading 22.04 to 22.10

After upgrading my KVM VPSes to 22.10 they can no longer resolve addresses. Same issue on all the servers hosted on the same provider (I used their image to install 22.04). I had other 22.04 instances ...
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How get IP forwarding work for two public server on anyconnect

I have two server and each one of them is in another network (not lan). I want to connect anyconnect server two through server one. I test to anyconnect and not working but I can connect v2ray ...
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Internet connection lost after connect L2TP/IPsec type VPN in ubuntu 22.04.1 LTS

I am using ubuntu 22.04.1 LTS. I have connected L2TP/IPsec type VPN for office work. After connecting to that VPN, I faced problems with all online tasks. I feel that my PC was not connected to the ...
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reconnect automatically a network shared foler who was disconnected

I followed this tutorial : https://www.chrisrmiller.com/mount-samba-share-in-ubuntu/ I modified the fstab file as it says. to mount a network shared folder in my Ubuntu 22.04. All is ok, but sometimes ...
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network not working and broken video driver after ubuntu system update

I am running ubuntu 22.04.1 very likely during the system update the nvidia driver got updated but after reboot they don't work anymore, I am using the default one on very low resolution and no ...
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Aid with install WAN Card Driver

I do not mean to ask the wrong question, I am a disabled person, and I have a WIFI6E mini PCI-E on a Router Modem so that I can use the device as an Access Point. It is not a problem with macOS or ...
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network completely disconfigured after seemingly normal boot

So I woke up this morning to boot my ubuntu 22.04 on a dell latitude 3420 as usual but I got an error like this Gave up waiting for root device on Ubuntu First answer suggested to go into BIOS change ...
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Archer T4U USB Adapter not working in latest release 22.10

just purchased a usb wireless adapter tp-link Archer T4U and it does not connect to home wireless?
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Why so many loop devices and symlinks on a fresh installation of 22.10? [closed]

I went ahead and installed the newest version yesterday (22.10) in hopes that it would be easier for me to work with due to whatever improvements it had. I can’t understand how my choice of the most ...
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Dell Precision 5540 No Wifi adapter found after upgrading from 18.04 LTS to 20.04 LTS

As the title mentions, I recently upgraded from 18.04 to 20.04, but now I have no WiFi or Ethernet, and I get the No WiFi adapter found error. I've seen quite a few people with similar problems, but ...
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How to chose internet source for Docker container on Ubuntu

Containers are basically using the internet interface that my "Ubuntu 22.04.1 LTS" is using but once I have multiple internet source I don't know how to make the container's use another ...
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Remove Unwanted Wifi Driver from Ubuntu 22.04

I had bought this USB Wireless Adapter (Realtek RTL8188FTV) installed the WiFi driver for it but unfortunately twice. Now One is working correctly but I want to remove the unwanted driver which is not ...
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Not able to connect Ubuntu via ssh while downloading the tomcat

I created a instance with configuration file with .sh file for tomact... its launched and successfully running. The problem appears from while connecting with ssh to windows cmd terminal...while ...
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Strange problem with WiFi hotspot

I use wifi hotspot on my home server (ubuntu) to share a wired connection wirelessly. The system is connected to a paid VPN. On client machines i have internet access and public ip is the ip of vpn. ...
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Why Does Wifi Only Work After Suspend

My wifi doesn't work unless I suspend then resume (it also doesn't always work if I do that). This is a Lenovo Legion Y7000 (which is similar to Y530) Any ideas? *-network ...
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IPv6 does not work and "no link-local IPv6 address for ens5"

When I try to ping6 ipv6.google.com I get ping6: connect: Network is unreachable. When restarting my network interface ens5 it shows a no link-local IPv6 address for ens5 message. I am pretty sure ...
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Routing application traffic through specific WIRELESS network interface

I've seen quite a few tutorials, more or less complete, about forcing an application to use a certain/specific network interface, however, all such tutorials deal with wired interfaces. The most ...
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Computer refuses to accept wifi password, sometimes

I have been using Ubuntu for the last several months and for the most part I have been having a good time with it. That is except for one issue. As is implied in the title my Wi-Fi just won't connect. ...
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Ethernet and wifi not working on Ubuntu 20.04.4

I understand this is a frequent problem and there are many similar questions already, but I cannot find a solution that works for me. Ubuntu 20.04.4 Ethernet: Says "wired connected" but I ...
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Cilium Network Policy

I have a microk8s one node cluster set up. When enabling Cilium network policies I cannot access the whoami webpage; however, I can access it fine without the network policy or if I uncomment the ...
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No network after latest update: Ubuntu 22.04

Running the latest 22.04 on a Lenovo Legion 5. Yesterday applied a regular update, including to the kernel. Afterwards was presented with another update. Said yes, but it went into an update loop ...
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SLAAC suddenly enabled in Jammy with kernel 5.15.0-56-generic #62-Ubuntu

Last night, my Ubuntu-based VPS updated itself to Linux smtp 5.15.0-56-generic #62-Ubuntu SMP Tue Nov 22 19:54:14 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux and since then, SLAAC seems to be ...
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Connect Multiple Interfaces on Raspberry Pi

I use my raspi as a local DNS resolver (Pi-hole). My router has 2 networks "Home" & "Guest". As usual, the guest client can't reach my raspi as it is on the home network so the ...
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Ubuntu as router with netplan & dnsmasq - can't reach websites

I have setup Ubuntu 22.04 LTS as a router for the following scenario: Client (192.168.222.100) <--> Switch <--> Ubuntu Router eth0 (192.168.222.1) <--> Ubuntu Router enx2887ba778049 (...
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I am not able to open any page on any browser

I am not able to open any page on any browser on my ubuntu 20.04. I have faced that issue earlier but i clear cache and that issue was resolved. But this time i was not able to resolve it by clearing ...
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Ubuntu 22.04 only boot normally via recovery mode

After recent upgrade (sudo apt upgrade -y) my screen resolution is stuck at 640, neither ethernet nor wifi is being detected. I tried reinstalling nvidia drivers but the problem persists. However, ...
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ip addr shows mutiple interfaces and multiple IPs... Which is the right IP address in the output?

I just want to find my PC's IP address... ip -c addr I can't... For the life of me decypher what this output is... 19: eth0: <> mtu 1500 group default qlen 1 link/ether a4:4c:c8:33:f1:9b ...
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How to set up Ubuntu system to use DNS on LAN host for local names

I've set up dnsmasq on a Raspberry Pi, and would like all my hosts on the LAN to use it. I have set the Pi's IP address in the router as primary DNS server. However, something in the Ubuntu system is ...
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How to join Kubernetes worker node to Control Plane Node using Vagrant virtual machines

I am setting up a Kubernetes cluster using Ubuntu 18.04 virtual machines with Vagrant. All goes well until I try to run the kubeadm join 10.0.2.15:6443 --token ... command on a worker node, and I get ...
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How to setup a LAN Server only accessible inside for files and media?

I used Ubuntu and Linux lot about 10 years ago for several years! I was fairly efficient at it. Fast forward 10 years, I haven't used Linux much lately. At my church, I setup a OpenMediaVault server ...
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Mediatek Network Driver Unclaimed on 22.04

I have recently installed Ubuntu 22.04 but the motherboard integrated wireless controller is listed as unclaimed *-network UNCLAIMED description: Network controller product: MEDIATEK Corp. ...
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How to get the ip address without ifconfig or ip command in Ubuntu?

Today I got a new Ubuntu server. I tried to get its IP address with the ifconfig or ip commands. But I got a command not found error. I searched the errors on Google, and it looks like I need to ...
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Can't connect to any WiFi Network after power off from button. Xubuntu 20.04

I have an ASUS ROG 14 Laptop, running xubuntu 20.04. It was running OK until yesterday. I turned off the machine with the power button and now I can't connect to WiFi. Right now I am tethering USB ...
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How to configure NetworkManager on a remote host without GUI?

I have a remote host running ubuntu desktop 22.04 and the default network renderer is NetworkManager. how can I set permenant configuration to the interfaces managed by NetowrkManager ? for example ...
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"Unable to access location:Failed to retrieve share list from the server"

Installed Ubuntu 22.04 (minimal installation).While browsing network shares getting error . "Unable to access location:Failed to retrieve share list from the server"
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Unable to SSH to remote computer

I have two proxy (two ip address) connections in my Ubuntu computer, and I am trying to connect through ssh to my university supercomputer using "corkscrew", but not able to connect, it ...
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another machine in the LAN can connect to the apache web server with the ip address but not the hostname

i have an apache web server setup and am trying to configure the hostname so that other machines in the same LAN network can connect using the hostname instead of the ip address. On the host machine I ...
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JBL Go 3 speaker not connecting to Ubuntu 20.04

I acquired a new laptop some months ago and have happily been using Ubuntu 20.04 but I've encountered a recent problem... My JBL Go 3 speaker is not connecting to the computer through bluetooth. I've ...
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How do i make a Static ip available over a network

I'm running ubuntu server 20.04 LTS in raspi 4 model B. I want to set a static IP in one raspi and run API over that ip and that must me accessible over the the network to which I'm connected to. I ...
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Ubuntu 20.04 eth Adapter Down Upon Boot, works with Lease Refresh

This is a bit of a strange one. Had a power outage, and after everything came back up (no physical damage), this Ubuntu box is starting up with the default/only eth adapter down. Upon a force dhclient ...
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My wifi adapter is not show and working

*-network:0 DISABLED description: Wireless interface physical id: 2 bus info: usb@3:7 logical name: wlx1cbfce2ea4db serial: 1c:bf:ce:2e:a4:db capabilities: ethernet physical wireless configuration: ...
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how to get the ip of my Ubuntu instance in AWS

How can I see the public IP address assigned to an EC2 instance, from within (i.e. after connecting) the EC2 instance? I can see the public IP address that is assigned to it, simply by looking in the ...
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How to install wifi drivers without internet?

I have a laptop that uses a RTL8723DU wifi chipset (driver: https://github.com/lwfinger/rtl8723du). I couldn't find the driver in the installer, and the laptop does not have an ethernet port. The ...

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