Questions tagged [networking]

Computer networking is the connection two or more computing devices for transmitting and sharing data. The devices use common communication protocols over a physical or wireless connection. Use this tag for questions about managing and using network connectivity on an Ubuntu system.

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Resolving LXD Storage and Interface Cleanup Challenges

Introduction: Greetings, LXD Community! We recently encountered some storage and interface cleanup challenges while deploying Charmed Kubernetes on a virtual machine. In this blog post, we'll walk you ...
hazoum soussi's user avatar
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479 views

How to fix problem with netplan configuration (ip address show) for Ubuntu 22.04?

Using ubuntu 22.04 I tried to assign the two IP addresses 192.168.200.100 and 169.254.1.0 to the ethernet device enx00e04c680202. Following this tutorial and this answer I created a file /etc/netplan/...
Alex's user avatar
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NAT to Guest VM not working

Port forwarding to my guest VM (Ubuntu 22.04.3 LTS) from my Host system (Ubuntu 22.04.3 LTS) works fine. Solution found. More details at the end. I am quite new to Linux and this routing problem is ...
Be Nce's user avatar
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1 answer
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why is /proc/sys/net/netfilter/nf_conntrack_count in Ubuntu 22?

In older versions of Ubuntu I was using /proc/sys/net/netfilter/nf_conntrack_count to see how many connections were active. I did this because I noticed that with lots of traffic if there are too many ...
Maarten Deen's user avatar
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Cannot successfully ping remote Ubuntu server from local PC?

So I have 2 remote Ubuntu servers (S1 and S2), one of which I can ping (S1). Also, I can connect to S2 by noVNC. I have a python server running in the default port on S2, but when I try to type the ...
xadd's user avatar
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64 views

Share bandwidth equally

I have a server with 100 Mbps bandwidth. Clients with dynamic IPs could connect to web server and download large files I need to use tc to allow them to use all bandwidth when they're dowloading alone ...
pirojnoe's user avatar
3 votes
1 answer
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How can I use netplan match on macaddress when I then bond the nic?

network: renderer: networkd ethernets: eth0: # usb ethernet 1 match: macaddress: f8:e4:3b:55:72:71 set-name: eth0 dhcp4: no eth1: # builtin match: ...
Tim's user avatar
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How to do I make X.org listen to remote connections on a Kubuntu 22.04 system on port 6000?

There are several solutions which I have already tried proposed. But none specifically addresses Kubuntu 22.04.. I've tried them all but the closest one to working is the use of socat to connect ...
Mike Westall's user avatar
-1 votes
1 answer
612 views

Ubuntu DHCP client uses IDs instead of MAC addresses. Can't change this behavior

I'm trying to use DHCP static lease assignment instead of manually managing static IPs for some of our servers. However Ubuntu switched from MAC addresses to some DHCP IDs becoming useless after major ...
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GUI SFTPs won't connect to a U22 virtual server from w11

I am trying to configure a U22.04 desktop running under virtual box as a file server, with a W11 client. I have installed a VBox bridged adaptor. I have installed samba, open-ssh and sftpd. I am ...
Dave Levy's user avatar
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Ubuntu 22.04: infinite authorization loop, cannot connect to wifi

For some reason I have mysteriously started getting repeated "Authorization required" popups when I try to connect to any network. Even if I type the correct password, the popup keeps ...
fivethirds's user avatar
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64 views

On Ubuntu 22.04, he internet is extremely slow and times out

My Asus Vivobook 17 acts like it's connected to the internet, but it's extremely slow, so slow that it times out. Not a single webpage will load. I've ran network diagnostics and everything says its ...
Olivia Forrest's user avatar
1 vote
0 answers
87 views

Have certain apps/ports bypass OpenVPN connection

I have an ubuntu server (22.04.3) that is running a Plex server and various downloading software. I'd like to have a VPN running to protect me, however when I do this, remote access becomes ...
Adam Heller's user avatar
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36 views

Previously good WiFi fails to connect

My Sony Vaio (Ubuntu 22.04.3) has worked with my BT Hub for years, but it's now displaying 'Activation of network connection failed' and will not connect. The computer sees the network and attempts ...
Derek 's user avatar
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Issues with ARP poisoning using ettercap [closed]

Sorry if this is the wrong place to ask. I am currently attempting to use a program called Ettercap to initiate a man in the middle attack (within my own network, in case I need to specify.). In this ...
lil bro's user avatar
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1 vote
1 answer
190 views

How can I force my Ubuntu Server to use the correct ethernet port (interface)

I have an Ubuntu Server running Ubuntu 22.04.3 LTS. It has two ethernet ports, enp3s0 and enxf8e43b557271. enxf8e43b557271 is much faster, so I want to use that by default, but, if it goes down for ...
Tim's user avatar
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Problems with Wi-Fi speed on Ubuntu 22.04 when using WPA3-Personal encryption in the router settings

I use Wi-Fi 5G on the same device but on different OS. In Windows, both with WPA3 and WPA2 encryptions, the Internet speed is about 250 Mbps. But on Ubuntu, the network speed with WPA3 encryption ...
mymyola's user avatar
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0 answers
27 views

Debugging DNS stub resolver

I am using Ubuntu 20.04.6 and I'm facing issues with the DNS stub resolver. Using the default settings, I cannot access several webpages. However, when I add the google DNS address to /etc/resolv.conf ...
spontiak's user avatar
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1 answer
132 views

Wifi to Wifi hotspot Ubuntu studio 22.04

I really want to use only Ubuntu, but one thing stop me for now... In Windows 10 64 bits, I can create a hotspot Wi-Fi when I am connected to Wi-Fi access point. Impossible on Ubuntu Studio 22.04 64 ...
Jean Bataille's user avatar
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Trying to connect my Bluetooth headphone to my PC

I need help. Everything goes fine, but when I want to connect my Bluetooth headphone it won't let me connect or it connects for a second and disconnects itself and like I have tried to pair and trust ...
Zramith's user avatar
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0 answers
28 views

Ubuntu server installation sets invalid FQDN

I recently installed the Raspberry Pi Ubuntu Server 22.04.3 LTS (64-bit) image, with their imager tool: # lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 22....
Floren's user avatar
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4 votes
1 answer
243 views

dig works only when specifying a nameserver

I have a Ubuntu 20.04 Desktop installation. I am unable to access internet or reach any servers by name. The DNS lookup is failing. DNS Servers are Windows DCs 10.0.1.22, 10.0.1.21 and two Cisco ...
rocky_alpine's user avatar
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34 views

Getting Bunch Of kernel: [UFW BLOCK] IN=wlp1s0 OUT In Journctl

My Ubuntu server goes out of reach after sometime, mean I cant access it through samba and not even SSH works and Apache also shows exit code When I checked my journalctl I had found bunch of kernel: [...
Rahul Sharma's user avatar
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0 answers
63 views

SSH Connection Stop After Some Time But CloudFlare Tunnel Works

I have a machine in my home which I use as a test machine and host some of my services, and to access those services from outside of my home I installed a CloudFlare tunnel as well. Now after some ...
Rahul Sharma's user avatar
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0 answers
124 views

L2TP / IPSec connection is succesfull but there is no internet and can't ping local adresses

I have Ubuntu 22.04 on my laptop. I configured the L2TP vpn from UI and it worked. But suddenly it does not work anymore (I didn't change any configuration). I still can connect to VPN without any ...
Kracozebr's user avatar
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Legion 5 laptop is permanently disconnected from wifi after suspending

I created an account for this. I have a brand new gaming laptop and am trying to install Ubuntu on it, but it keeps permanently disconnecting the wifi after I close it. Only when I power off then ...
custolas's user avatar
6 votes
1 answer
402 views

Blocking internet access for non-administrative (child) user in Edubuntu

I have setup Edubuntu on a laptop (Edubuntu 23.10 Mantic Minotaur). There is an administrative parent account and a (non-administative) child account. Of course, the application management lets me ...
user823's user avatar
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ufw rule to allow address on the same subnet?

I have a server running Linux hosting a website. It uses ufw as a firewall. I have ports 80 and 443 open to external traffic. This all works. Now what I want to do is allow any traffic from my laptop ...
Mark Challice's user avatar
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1 answer
139 views

cannot enable wifi on Ubuntu server 22.04 installed on macbook air 2019 with Broadcom [14e4:4488] (rev 04)

I am connected to the internet via ethernet cable and want to enable wifi on macbook air 2019 running ubuntu server 22.04. My pciid is as follows: 73:00.0 Network controller [0280]: Broadcom Inc. and ...
Sainath Sanga's user avatar
0 votes
0 answers
57 views

Still getting [UFW BLOCK], which rules apply?

I still get a message UFW BLOCKED: Dec 22 05:12:41 ge-domoticz kernel: [5324365.003868] [UFW BLOCK] IN=eth0 OUT= MAC=b8:27:eb:a1:7b:8b:38:1f:8d:e9:e4:9f:08:00:45:00:00:28:92:8c:00:00:ff:06:2f:d4 SRC=...
Edgar Hildering's user avatar
0 votes
0 answers
262 views

No WIFI QUALCOMM QCA6174

I should start with the near ubiquitous line "total newb of newbs here", so please be patient, thanks. So I've been running U22.04 for quite a while now and had no problems at all until I ...
Charlie's user avatar
1 vote
1 answer
54 views

Configure bosch cameras through Ubuntu

I am trying to configure Bosch network cameras,my OS is Ubuntu 22.04.1 LTS. On Windows systems, Bosch provides a software called Configuration Manager, through which cameras can be initialized (...
shamindra's user avatar
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0 answers
47 views

Access Server in Local Environment

"Hello, I recently purchased a static IP from my internet provider, PTCL, and successfully configured it with my server. Typically, when accessing our server, we use the static IP by making a ...
Wali's user avatar
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2 votes
1 answer
436 views

What does the `arp` command show?

I googled and took a look at this page for example, and I know that the arp command is supposed to show the mapping between an Internet Protocol (IP) address and a Media Access Control (MAC) address. ...
Alex's user avatar
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0 votes
1 answer
129 views

Port Forward for LAN

I bought a server and have Ubuntu 22.04 installed. When I run various Github projects like Text Generation Webui, Automatic1111 Stable Diffusion, etc., how do I forward the port to access it from my ...
rbur0425's user avatar
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0 votes
1 answer
166 views

Run a command using system.service ./start start

I'm trying to get my system.service file to run a command that is inside my start script. I've tried adding StandardInput= which did not work, so I believe I misunderstood how that operates. I've also ...
Lex King's user avatar
0 votes
0 answers
13 views

Frozen screen while selecting wifi network

I use Ubuntu 22.04, in the default window manager when I click on "select network" the window of the network manager occupies the center of the screen and there I can pick one of the ...
Gna's user avatar
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0 votes
0 answers
96 views

Failed to write to /dev/nvme-fabrics: Connection refused

I am trying to connect 2 Pc one as host and the other as the client to each other through nvme over tcp so i have follwed this website of redhat https://access.redhat.com/documentation/en-us/...
Aman Sharma's user avatar
0 votes
0 answers
75 views

Wireless is disabled by hardware switch (other seen solutions won't work)

I bought an old Lenovo T430s. It arrived with the airplane mode switched on, with the toggle grayed out. It says to "use hardware switch to turn off". So far I have tried: Toggling the ...
diogenes94's user avatar
0 votes
0 answers
47 views

i40e AMD-Vi IO_PAGE_FAULT

one of our servers crashes regularly (Supermicro, Ubuntu 22.04), apparently during heavy network load. The log files are then full of this message: kernel: [514257.305733] i40e 0000:02:00.0: AMD-Vi: ...
st6f9n's user avatar
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0 votes
1 answer
398 views

Cannot connect to Samba share from Windows 11, have tried EVERYTHING

I have an old PC that I use as a server. It mostly is used for serving up Plex and family photos/videos - just three SATA drives attached for storage. The machine runs Ubuntu Server 22.04.2 installed ...
buntu peddler's user avatar
0 votes
0 answers
72 views

Ubuntu 23.04: Static ip in interfaces does not persist

I can't assign a static ip in Ubuntu to get host-only network up and running, probably something simple VirtualBox on windows 10 host, ubuntu server 23.04 as guest, no GUI installed on the guest Host-...
plykkegaard's user avatar
0 votes
0 answers
103 views

Ubuntu 22.04 allow VNC server connection from LiveUSB image?

So, I need to install Ubuntu on a machine, and I booted Ubuntu Desktop (Gnome) LiveUSB image there. The user ubuntu there by default has no password, so I had to so sudo passwd ubuntu in order to ...
sdaau's user avatar
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55 views

Preparation for Ubuntu 22.04 LTS home server

I just setup Ubuntu 22.04 LTS Server Edition on my home lab PC. My Internet ISP provide me with dynamic public ip address, and I use freedns.afraid.org to update record for my public IP address. I set ...
VeriShare's user avatar
0 votes
0 answers
261 views

can't connect ubuntu server to internet

I am new to ubuntu server and i can't manage to connect it to the internet. It is the latest Ubuntu 22.04 LTS. Even during the internet setup window for the installation the wifiscan couldn't start. I ...
pira1999's user avatar
1 vote
1 answer
74 views

Bandwidth rate for specific IP (bash scripting)

I can watch live bandwidth rate using tcptrack -i ens3 src or dst IP But I need to use it in bash script Are any tools which could return current bandwidth rate for given IP? Like in tcptrack in the ...
pirojnoe's user avatar
0 votes
0 answers
171 views

netplan/udevadm broken in Ubuntu 22 LXC containers

The physical host is running 18.04.6 LTS and LXD/LXC 3.0.3. I have two unprivileged containers, one Ubuntu 18.04 container and a new Ubuntu 22.04 container. (Using the default images that lxc launch ...
Curtis's user avatar
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0 answers
180 views

Postfix is running but it is not listening in any port

this is the postfix status: ● postfix.service - Postfix Mail Transport Agent Loaded: loaded (/lib/systemd/system/postfix.service; enabled; vendor preset: enabled) Active: active (exited) ...
jstuardo's user avatar
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0 answers
478 views

psql: error: connection to server at "localhost" (127.0.0.1), port 5432 failed: Connection refused

I had a problem here psql: error: connection to server on socket Hello Everyone, I checked a lot on the Internet to fix the problem but couldn't do anything. First of all, I changed my configuration ...
Abol's user avatar
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0 answers
43 views

ubuntu server becomes unreachable through ssh over time

I'm encountering an issue with my Ubuntu server where, after a reboot and some time has passed, I am unable to connect through SSH or ping the host. I could trigger github actions that could run on ...
Dmytro's user avatar
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