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.
11,235
questions with no upvoted or accepted answers
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USB Ethernet + thunderbolt errors
Currently having major issues with thunderbolt ethernet adapter.
The device is a "Razer Core X" thunderbolt eGPU enclosure which has a built in USB3 hub and gigabit ethernet port. Essentially a very ...
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NetHogs showing suspicious (outgoing) traffic to random ports from root on Ubuntu 16.04
Using NetHogs on an Ubuntu 16.04 (web) server, i.e. on a machine where no consumer applications or web browsers are installed, besides traffic that is to be expected (HTTP and SSH)
PID USER ...
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Ubuntu 18.04.2 LTS server - network configuration problem during setup
When installing from current server iso's in a VMWare VM and without a DHCP Server present, both Ubuntu installers are not able to manualy configure a ethernet interface.
With the ubuntu-18.04.2-...
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Can't access GitHub via Google Chrome?
I successfully run the command ping github.com. Output is like:
PING github.com (192.30.253.112) 56(84) bytes of data.
64 bytes from lb-192-30-253-112-iad.github.com (192.30.253.112): icmp_seq=1 ttl=...
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Ubuntu 22.04 Activation of Network Connection Failed
I have tried all the methods I have found but nothing works.
The connection I am trying to get to work is wired ethernet, the cable goes to the wall socket, back to a tp-link tl-sg108, which takes the ...
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Intel Wifi Periodically Stops Working on Ubuntu 22.04
Error:
[42740.562956] iwlwifi 0000:00:14.3: Microcode SW error detected. Restarting 0x0.
[42740.563042] iwlwifi 0000:00:14.3: Start IWL Error Log Dump:
[42740.563047] iwlwifi 0000:00:14.3: Transport ...
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Cisco AnyConnect dropped and can't reconnect without reboot
I am using Cisco AnyConnect on Ubuntu 18.04. The VPN sometimes got disconnected unexectedly. I try to reconnect, even quit the GUI, kill all process for programs under /opt/cisco, restart ...
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A stop job is running for Raise network interfaces (/1min 31s)
When I am trying to shutdown my pc running ubuntu 16.04.5 it will hang on this line:
A stop job is running for Raise network interfaces (1s/1min 31s)
This is my /etc/network/interfaces file:
# This ...
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8
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Cisco AnyConnect: Posture Assessment Failed: CSD library signature verification failed
All of a sudden AnyConnect stopped working.
Version 4.5 on ubuntu 16.04.
I'm now getting the following error when trying to connect.
Any ideas on how to resolve it?
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Cannot Get Xdmx to work with two Ubuntu Computers (xinit error)
I have two computers running Ubuntu 16.04 with Unity, and I'd really like to use the distributed multihead (Xdmx) software in order to use one of the computers as a second monitor, instead of just ...
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How do I remove the long name given to my internet connection?
The other day my computer randomly started displaying the full name of my ethernet controller as you can see here:
I'm fine with it saying Ethernet Controller like it used to but having the whole ...
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2
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Can't control connection bit rate using iwconfig with Atheros TL-WN821N (AR7010)
I'm trying to reduce the connection bit rate on my Atheros TP-Link TL-WN821N v3 usb wifi adapter due to frequent instability issues (reported connection speed goes down to 1Mb/s and I have to ...
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Wifi connected but Internet drops frequently
I spent more than 2 weeks searching for a solution to the following problem without success:
On my Ubuntu 18.04, I am connected to a Wifi (named "SmartCampus") but the internet keeps dropping ...
user545149
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Tunneling with tun2socks to bypass Iran's internet censorship
I am a beginner, I was trying to tunnel between my computer to VPS1 (which has restricted internet due to Iran government policy) and VPS2 (From an Europan provider). Just rented an Ubuntu 20 VPS ...
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Wifi keeps disconnecting (Ubuntu 20.04)
I have a dual boot Windows 10 and Ubuntu 20.04 machine. I can connect to Wifi fine on Windows, but when using Ubuntu it disconnects every 10-20 minutes or so. When this happens, I can always get it ...
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Network Activation fails for wifi
I have a BrosTrend AC3L device. It worked initially an then I patched to latest 20.04 and it seems to have developed this behaior. The devices comes up and connects to the network and then fails to ...
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VPN: openconnect how to indicate a form field for authentication purposes?
I am trying to connect to a corporate vpn using openconnect (protocol Global Protect):
perret at perret-pc in ~
$ openconnect --protocol=gp [vpn-address]
POST [vpn-address]/ssl-vpn/prelogin.esp?tmp=...
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Cannot disconnect from NordVPN
System Info:
Ubuntu 18.04.1 LTS
NordVPN Version 2.0.0
I recently installed the nordvpn-release_1.0.0_all.deb following these instructions. I'm able to connect to a VPN server via terminal using ...
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1
answer
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Torque: Unauthorized Request
Following this guide:
https://jabriffa.wordpress.com/2015/02/11/installing-torquepbs-job-scheduler-on-ubuntu-14-04-lts/
I installed TORQUE on Ubuntu 16-04-lts (he claims the process works the same ...
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How to reset netplan to default in 18.04?
I tried creating a network bridge through Virtual Machine Manager for KVM. Now my Ubuntu network connection depends on my Windows KVM being booted.
Since creating this bridge when Ubuntu is booted ...
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How to automatically bring up CAN interface in Ubuntu 17.10
In previous versions of Ubuntu I have been using this script to automatically bring up an network interface for a USB to CAN bridge device, whenever the device is plugged in:
$ cat /etc/network/...
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How can I network two computers together using Thunderbolt 3?
I have two computers, and I need to transfer a (very) large file between them.
Both computers are Thunderbolt 3 compatible, and I have a passive Thunderbolt cable ready to use.
Is there a way I ...
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Why Speed and duplex Unknown?
I'm adding a Network card (OneConnect 10Gb) on Ubuntu 16.04 and run the ethtool command but output shows speed and duplex unknown!.
Any idea how to fix this problem?
xxx:~# ethtool enp12s0f0
...
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6
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Apply static IP address change in /etc/network/interfaces in Ubuntu 16.04
TL;DR: In Ubuntu 14.04, If you change a static IP address in /etc/network/interfaces and apply the changes with ifdown and then ifup command everything works fine. But this sequence is not working in ...
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Avahi local name collision
I have defined a subnetwork on my server, using ip aliases for a single ethernet card.
Today, after a reboot, the avahi daemon is not resolving host names anymore.
The hosts defined in /etc/avahi/...
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Problem with PBISOpen and Ubuntu 14.04LTS
I'm testing openpbis 8.3 version and I have authentication problem when I'm trying to open new session on Ubuntu 14.04 LTS, not in local network but only in distant network.
Adding the computer on ...
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Can't connect to WiFi with "Connection activation failed" error after upgrade from 14.04 -> 15.04
I recently upgraded from 14.04 to 14.10 to 15.04 in succession. I lost internet capabilities each time, thanks to my having to use a Realtek WiFi dongle.
I was able to resolve those issues both times,...
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cat: /var/lib/misc/dnsmasq.leases: No such file or directory
I've searched all over the internet, but couldn't find any answers of my problem..
I want to connect my Raspberry Pi to my laptop. But whenever i try to check the ip address of my raspberry, i get ...
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6
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(32) Ad-Hoc mode is not supported by this device. - 13.10 on i5 NUC
Not sure if this is an Ubuntu issue or intel issue. Any insights will be appreciated.
I have an intel NUC (D54250WYK) w/ intel 7260 wireless adapter and Ubuntu 13.10.
I can connect to my local wi-...
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6
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Getting WiFi AP working with hostapd and isc-dhcp-server [Xubuntu 14.04]
I have tried using ap-hotspot from WebUpd8, and it did not work for me in 13.10 or 14.04, so I have been working on getting hostapd manually set up, using isc-dhcp-server since dnsmasq was having ...
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How can I connect to Microsoft Direct Access?
My company has moved from Cisco VPN to Microsoft Direct Access. I was using network-manager-vpnc to connect from Ubuntu before. Can I use the same to connect to direct access? If not, how can I ...
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Available networks stopped showing 5GHz networks on Ubuntu 22.10, 22.04
I was able to connect my home 5GHz wifi (with _5G suffix on name) on Ubuntu 22.04. After an update via Software Updater, my network list stopped showing 5Ghz networks. I then upgraded Ubuntu to 22.10, ...
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Ubuntu 22.04 kernel update to 5.19 breaks Wi-Fi (mt7921e)
Few days ago I've upgraded the kernel (via apt upgrade) to 5.19.0-32-generic.
After 1 or 2 days in the middle of browsing the internet, Wi-Fi stopped working.
After the reboot, a new error started to ...
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gnome-remote-desktop: Couldn't retrieve RDP username: Credentials not set - AND MORE
After installing a fresh copy of Ubuntu 22.04 I attempted to enable Remote Desktop:
I then went to another workstation (tried both Windows and macOS with the Microsoft RDC and with Jump Desktop) and ...
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Wifi Network-manager icon in green color Ubuntu 20.04
Ubuntu 20.04, does any of you knows why the icon tray is displayed as green?
When this happen also the wifi stops working.
I found this on the web but they trolled the poor guy.
It only happens when I ...
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Issues with iwlwifi drivers on fresh 20.04 install
I recently got a Thinkpad P14s, since I saw it was Ubuntu Certified hardware. Install of 20.04 went fine, but I do not seem to have a wifi option in network settings. Following some other posts I have ...
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"Failed to start Network Name Resolution/Time Synchronization"
My Ubuntu 20 computer shut down when I wasn't looking, and now when I try tu turn it on the following messages appear over and over
[FAILED] Failed to start Network Name Resolution.
See 'systemctl ...
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Ubuntu 19.10: "Add" OpenVPN connection is grayed out
I'm trying to add a new OpenVPN connection on a fully-updated Ubuntu 19.10 PC, but the Add button uptop is grayed out:
I already tried to:
zane@zane-pc:~$ sudo apt-get install network-manager-...
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systemd-resolved and resolvconf : is it ok to have both installed?
Systemd-resolved is present by default in Ubuntu 18.04. Resolvconf pkg is not.
From reading around, systemd-resolved provides name resolution while resolvconf provides multi-client access to update ...
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Openvpn connection problem using network manager
I have problem with connecting to vpn my company gave me those files along with a password
I tried to import them this way
1- I go to Network Setting
2- then I press the plus button to add new ...
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USB Wifi adapter Realtek 8811AU/8812AU not recognized
I have freshly installed ubuntu 18.04.1 LTS. My usb wifi adapter which works perfetcly fine in windows 10 in the same system (dual boot), is not recognized here. the chip of the adapter is a Realtek ...
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Unstable wifi connection - "activation of network connection failed" Ubuntu 18.04
I have installed Ubuntu 18.04 on my HP laptop. LAN cable works fine, but WIFI connection is terrible. It might work sometimes but starts weakening too soon - starts "connecting" and eventually says "...
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DNS and public WiFi portals
I use Ubuntu 17.10 and regularly encounter problems whilst connecting to public WiFi networks, especially those redirecting to a login portal.
When working on my personnal network, /etc/resolv.conf ...
user817915
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DNS_PROBE_FINISHED_NO_INTERNET Ubuntu 16.04
When I connect to the router and navigate on Chrome I get this error:
DNS_PROBE_FINISHED_NO_INTERNET
I get the same even if I connect to another router in my area.
I tried the command sudo -r ...
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tun0 doesn't have internet access
I'm using OpenVPN on tun0 (Ubuntu 16/EC2), I can successfully start it with systemctl start openvpn@Ireland (PIA's Irish cluster), but the interface doesn't have Internet access:
curl --interface ...
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Service Command - Why service --status-all and service SERVICENAME status returning different results?
I am connecting to my local VMs via ssh private key.
My understanding is the service SERVICENAME status returns the detailed status of the service and the output mentions that the service is 'Active' ...
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Freeze on losing network connection
When I mount a server file system that is located in a local network over nfs on my laptop, the processes interacting with the filesystem freeze / hang up whenever the network connection is lost. The ...
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Wifi keeps disconnecting on HP 2000-2c10DX
My wifi keeps dropping connection constantly. I really want to use Ubuntu as a main OS, but this wifi problem is an issue. In the past, upgrading the kernel fixed it, but it isn't fixing the problem ...
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How do I force nmcli to reconnect to different uuid?
I have a bash script that checks my network environment and mounts shares accordingly. If I'm at work and have a hard-wire connection to the LAN, then I'd like to activate a hotspot connection for ...
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Cannot change Wifi settings, stuck on WEP Security
I just started using Linux and as such do not have a proper knowledge of how to use the command line and all of those sorts of things, so please try to bear with me :).
I have been able to connect to ...
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