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.
23,121
questions
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Cannot resolve own local (avahi) hostname
After swapping a faulty router, trying to ssh from PC "A" (Ubuntu 20.04.6) to PC "A", produces the error message: ssh: Could not resolve hostname pca.local: Name or service not ...
- 1,414
-2
votes
0
answers
25
views
Mounted network folder not accessible after resume from suspend
I use this code to mount a network share folder:
sudo mount -t nfs 192.168.104.11:/mnt/user/data /media/data
However when my pc goes into suspend mode the mounted folder is no longer available and ...
- 1
-1
votes
1
answer
30
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unable to do any connection after changing hostname(probably)
I needed to change hostname on ubuntu 22.04. I did it the old way, by manually editing /etc/hostname and adding
127.0.0.1 localhost
127.0.1.1 my-host-name
into /etc/hosts not knowing about ...
- 293
0
votes
0
answers
11
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Forwarding https traffic from openvpn to internal server which has internet access
I am trying to achieve the following behaviour
Client <--> openvpn at 1194 <--> internal server at port 8080 <--> internet
I used iptables prerouting route on nat with DPORT 80 and ...
- 1
0
votes
0
answers
37
views
System network connection
I tried installing a vpn (hide.me) then uninstalled it since I was not able to use it. After uninstalling the vpn, my Ubuntu was no longer connecting to the internet. It shows that the internet is ...
-1
votes
0
answers
24
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Android USB Tethering not working on Ubuntu 22 (not supported by any plugin)?
I use a LineageOS Andoid install on my smartphone; Wi-Fi tethering/hotspot works fine; however I have a problem with USB tethering: I plug in the USB cable in the laptop, phone is detected, and then ...
- 1,556
0
votes
2
answers
49
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Kubuntu 22.04 wlp2s0 wifi connected, but doesn't exist in "connections" app
Running kubuntu 22.04 on older Dell Inspiron P75F.
Wifi connects as wlp2s0 and internet is accessible. However, the device is missing from the "connections" app and the "network" ...
- 21
-2
votes
0
answers
49
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SSH hanging with Raspberry Pi
I have a RaspberryPi Model 3A+, with the Raspbian OS installed. I am trying to SSH from my laptop, into my Pi over my LAN.
Initially I encountered no issues. I could ssh in fine, execute commands, etc....
- 17
0
votes
0
answers
39
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Not able to access protected folder in windows using samba
Im using ubuntu server 24.04 lts and samba for file sharing to windows. The problem is im unable to open or connect to password protected folder but public/not protected folder can be accessed easily.
...
0
votes
0
answers
42
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How do I fix: Connection Failed. Activation of network connection failed
I purchased a (No Name) USB bluetooth 5.0 device.
When I inserted the device the OS immediately picked it up.
Before I connected any devices, mobile phone or earphones, I got the following message ...
- 115
1
vote
1
answer
54
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Preconfigure WiFi settings in Ubuntu Core 24 image with Raspberry Pi
I'm building a custom Ubuntu Core 24 image for a Raspberry Pi 3 and want to set a list of WiFi networks for it to auto-connect to. I found this post and modified the 24 branch of the pi-gadget snap to ...
- 11
0
votes
0
answers
38
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Ubuntu does not see any wifi networks
Hello I am new to Linux so sorry if i don´t give enough information.
As stated above Ubuntu does not see any WiFi networks.
Current setup
Operating system: Ubuntu 24.04 LTS
Processor: Intel Core i7-...
- 9
-1
votes
1
answer
53
views
FTP client timeout to all tested publically available FTP servers
I am setting up a desktop with a newly installed Ubuntu 20.04LTS. The desktop failed to connect to any FTP server I tried that can be connected to by other machines. ping to these ftp servers worked. ...
- 1
-1
votes
1
answer
133
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Need to configure user password policy on Ubuntu 22.04 server
We want to configure the following user password policy on our Ubuntu 22.04 server. I have referred to online documentation but have not found a consolidated guide that can help us implement the ...
- 1
0
votes
0
answers
24
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After updates no network is found anymore by wifi antenna
Well I had after half a year of not using ubuntu half a dozen updates, around 1.9 GB of updates.
I noticed afterwards I had to reinstall the drivers for my antenna, as per here: (Driver for the TP-...
- 381
-1
votes
0
answers
23
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Issues with PiVPN Wireguard Port Forwarding on Ubuntu Server
I'm experiencing some difficulties with setting up PiVPN with Wireguard on my Ubuntu server. Here are the details of my setup and the issues I'm facing:
Setup:
Ubuntu Server: Running on my home PC.
...
-1
votes
0
answers
105
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Post Ubuntu 24.04 LTS install Errors on http://security.ubuntu.com after apt upgrade command
It says connection failed. But I can successfully ping these IP addresses.
This is the error output.
Err:2 http://security.ubuntu.com/ubuntu noble-updates/main amd64 libwebkit2gtk-4.1-0 amd64 2.44.2-...
0
votes
0
answers
77
views
WireGuard - Server Through Gnome Network Manager?
Can a WireGuard server be setup through Gnome network-manager? with a wireguard.conf file - no terminal or other program needed.
I need 3 clients to be able to connect to the server.
Internet traffic ...
- 83
0
votes
0
answers
135
views
apt update unable to connect after kernel upgrade
Ubuntu 24.04 (upgraded from a long sequence of earlier releases). I recently updated from 6.8.0-31-generic kernel to 6.8.0-35-generic. After restarting the system, apt update could no longer connect ...
0
votes
0
answers
14
views
TP Link UE200 fails to initialize during boot
I had ordered a USB to Lan adapter from TP link (link) which used to work perfectly fine around 6-8 months ago in Ubuntu Server 20.04 running Raspberry PI 4B (4GB RAM) and I recently tried to connect ...
- 23
-1
votes
2
answers
126
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Setting static IPv4 address , is not contained in subnetmask
I am trying to add a static IP address while installing Ubuntu 20.4 but getting this error:
I want to set the below config:
IP :- 10.11.15.23
Mask :- 255.255.254.0
gateway:- 10.11.15.12
0
votes
0
answers
15
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When we are installing microcloud on ubuntu22.04 it's taking longer than usual while initialising microcloud
while installing microcloud and initialising it it's taking longer than usual while scanning local subnet on the machine so how can we overcome to this issue, is there anything we are missing or ...
0
votes
2
answers
109
views
No wifi after wake from suspend Ubuntu 24.04
After upgrading to 24.04 from 23.10, I lose wifi after a wake from suspend. Restarting brings it back. This problem is new with 24.04. Had no problems with 23.10.
lspci-v gives:
Subsystem: Intel ...
- 11
-1
votes
0
answers
50
views
Ralink rt3290 wifi still not working with Ubuntu
I have an HP laptop with a Ralink rt3290 wifi adapter and problem is that Ubuntu cannot find the driver for it, thus it doesn't find my router. What can I do to fix this?
+ lm@lm-HP:~ Q lM@lM-HP:-$ ...
- 1
0
votes
0
answers
55
views
I can't connect to wifi because the system doesn't ask a password
I'm running Lubuntu 22.04.4 LTS on a old laptop. Everything works fine, except for this problem: with certain routers (luckily at home everything works fine, but sadly not at university) when I click ...
- 17
-1
votes
0
answers
17
views
Ubuntu server 22.04.03
I am new to the forum, I am trying to install Ubuntu server 22.04.03 but I get the following error:
sorry, the installer has encountred an internal error.
[View full report]
if you want to helo ...
0
votes
0
answers
33
views
Static route problem
I define a local IP address in ubuntu 22.04 and route the real IP address so that the switch does not keep arp records.
I add 2 IPs in ubuntu and define the default gw of the local ip address. I can ...
- 1
0
votes
1
answer
170
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How to ping Docker container from host and vice versa? Which network would be best to use?
I am new to networking but my target is to be able to ping a Docker container from the host and vice versa.
I know there are different types of networking in Docker (bridge,host,macvlan, [two types of ...
0
votes
1
answer
61
views
802.11n USB wifi adapter (LM Technologies LM816-0648-3 Realtek 00E04C0001) crashes system
I have a desktop running Ubuntu Studio 22.04.1 LTS with kernel 6.2.0-1018-lowlatency,
with a LM Technologies LM816-0648-3 Realtek 00E04C0001 802.11n NIC USB wifi adapter.
Wifi use locks the system (...
- 442
1
vote
1
answer
68
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How to force Ubuntu to look at netplan for DNS and not look at resolv.conf
What is the best (proper?) way to force Ubuntu 22.04 to look at ONLY netplan for DNS configuration? I'm working with Rancher+RKE2 and their preparation script includes truncating the resolv.conf file. ...
- 11
0
votes
1
answer
32
views
Ubuntu WiFi hotspot MIA
I have a fresh Ubuntu 24.04.4 with a USB Wifi dongle from BrosTrend (AC1L), the most Linux friendly I can find. This is a minimal desktop version, but I initially turned off X/GNOME as it was mainly ...
- 125
0
votes
0
answers
22
views
How to connect a open vSwitch interface to physical interface of another host?
I want to connect a switch interface to physical interface of another host. I am using Open vSwitch and ryu controller. I have one physical interface i.e., enp4s2 (IP address = 192.168.10.2/24) and ...
-1
votes
0
answers
167
views
vpn nor working properly after update to kubuntu 24.04 - updated
I'm using openvpn. Everything was working fine, until I updated from ubuntu 22.04 to 24.04. Now I cannot access some internal websites. When the vpn is connected the following happens:
I can ssh to ...
- 163
0
votes
0
answers
40
views
How do u connect to a socks5 proxy with password and login
I feel like for weeks I have been going in circles and I’m desperate I’m not sure what I need to connect it. When I say I’m a virgin to all of this I mean I have never connected a proxy to anything ...
0
votes
1
answer
49
views
Temporary failure in name resolution runing Ubuntu 22.04
This error appears for machines on my local network but not on any other site, e.g. google.com.
This started after the machine in question was used to test a local 10. network. The gnome network ...
2
votes
0
answers
234
views
WiFi connectivity hangs intermittently after upgrading to 24.04
I upgraded to 24.04 from 23.10 last week and have had issues with WiFi since. It works fine most of the time and has no issue connecting to various access points, however after some time the ...
- 262
-2
votes
0
answers
54
views
Understanding DHCPv6 and IPv6 log entries in Ubuntu 24.04
I see the following lines regularly in my servers journal:
Jun 01 22:14:23 serverhostname systemd-networkd[714]: eth0: Ignoring DHCPv6 address 1234:567:890a:bcde:f123:4567:890a:e82/128 (valid for 1h ...
- 1
0
votes
1
answer
312
views
WiFi not connecting after upgrade to Ubuntu 24.04. Problem with apparmor?
After upgrading to Ubuntu 24.04 I can't make any network connections, wired or wireless with automatic DHCP enabled. If I set IP Address, Netmask and Gateway manually everything works. To get the ...
- 45
0
votes
0
answers
44
views
noble 24.04 ssh after DHCP reservation
When I installed 24.04 on my two machines (let's call them foo1 and foo2), Ubuntu settings has an ssh feature in settings|system|secure shell which would allow me to simply type ssh foo2 from foo1 to ...
- 664
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105
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UBUNTU 24.04 double routes - how?
Hya,
after installing 24.04 and restoring networking files (ifconfig, dnsmasq, etc), i found the my routing table shows the following:
root@wolke:~# route -n
Kernel IP routing table
Destination ...
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0
votes
0
answers
38
views
How to create a network bridge between wlan0 and et1 to a second eth0 device?
I have a network topology as described in the linked image. Network Setup
I have a WiFi router on a private 10.12.12.1 network. An Ubuntu 20.04 box, on a Nvidia Jetson, is connected to the WiFi ...
- 1
0
votes
1
answer
40
views
How to resolve network connectivity issues between my Ubuntu VM and Windows host? Ubuntu VM is unable to ping host, but able to ping everything else
I'm having a networking issue with my Ubuntu server VM. My Ubuntu VM is able to ping everything EXCEPT my Windows Host. I've tried disabling the firewall on both sides, assigning a static MAC address, ...
0
votes
0
answers
27
views
Ubuntu 22.04 used a huge amount of traffic after booting
I have a second laptop with Ubuntu 22.04 installed, which I did not boot under Ubuntu for Apx. 1.5 month.
Today I booted it and logged in, then wanted to check the activity monitor. Normally I see ...
0
votes
0
answers
11
views
Slow internet Download on my server using wired connection
Recently added a 25G network interface card (NIC), and am connected to my network through fibre but recently I am experiencing extremely slow download speed (5-254 kbps) on my 1Gbit/sec connection.
...
0
votes
0
answers
39
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Wireless Adapter not Found Ubuntu 20.04 Kernel 5.15
I am attempting to connect to my network via a 6E AX210 integrated wireless adapter. I am running Ubuntu 20.04 from a bootable external HDD (crucial x8) and have installed iwlwifi-ty-59.601f3a66.0.tgz ...
0
votes
2
answers
111
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Portforwarding Port 22 ( for ssh ) over JioFiber Router not working ( port 22 is closed )
I am using a JioFiber Router ( Firmware version : SRCMTF1_JCOW414_R2.52.1 ) . The host that I want to expose to the internet has Ubuntu Server 24.04.
Private IPs :
Router ...
0
votes
0
answers
127
views
wifi(wlan) not working on ubuntu 24.04?
i think the error is in the image
I recently updated to Unbuntu 24.04 LTS version. During that day everything worked fine but today I encountered a problem connecting to my wifi, It no longer works. I ...
0
votes
0
answers
25
views
Can't ping USRP N210 from Ubuntu VM ver 22.04.3
I'm trying to install and use GNURadio with USRP N210 on my windows 11 PC
I've installed Ubuntu ver 22.04.3 and GNURadio and both work except for recognizing the URSP
I have a point to point ethernet ...
0
votes
0
answers
52
views
Wifi not working on ubuntu?
I recently updated to Unbuntu 24.04 LTS version. During that day everything worked fine but today I encountered a problem connecting to my wifi, It no longer works. I restarted my computer, but I can ...
0
votes
0
answers
51
views
Unit network-manager.service not found
I installed node.js then it started removing something then I found out I couldn't access my network (wifi nor network adapter). I have tried to run different program still same.
