Questions tagged [networking]

Managing and using network connectivity on a Ubuntu system

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Transfer program output from one Linux system to another

I've two Linux systems (S1, S2), I want program/command execution output to transferred to S2 via Network(Please Suggest mode). Suppose I say "Prime number finder" program on S1 run or Htop on S1, ...
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routeur technicolor td5130 v3 [closed]

i have an old version of ubuntu 9.10 desktop edition, and i would like to instal routeur technicolor td5130 v3 to get internet connection. Does it work automatically or do i have to get driver for it? ...
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Wifi interface automatically turns on

I have a laptop with a built-in wifi interface. Sometimes I have to use it so I use wpa_supplicant to connect. When I don't need it anymore I just kill the wpa_supplicant process and turn off the ...
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Wifi adapter disappeared after last kernel upgrade - Ubuntu 18.04

So, I just received the last kernel upgrade in my Ubuntu 18.04 and, when I boot, my wifi adapter won't start (the light that indicates it's on remains dark). It's not even discoverable. It works ok ...
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Can I use SPICE as a VNC replacement for fast local 5ghz remote desktop?

I know spice is used by virt-manager to control virtual machines. Can I use SPICE to do the same thing but over a fast 5ghz local network? I want to control the machine on the other room but I need it ...
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Wifi works when thethered from phone not directly

My wifi is really fast when I access it via my Android smartphone's tether-able hotspot (80.5 Mbps download, 14.8 Mbps upload), but super slow when I access the wifi directly. What might be the ...
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Unable to authenticate to SAMBA printer

I am on Ubuntu 19.10 (but, the same problem also on Pop! OS 19.10 and Ubuntu 18.04). I am trying to add a SAMBA printer that exists somewhere on the organisations' network. The printer itself is ...
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How to fix Failed initializing wireless card mon0

Interface mon0: ioctl(SIOCGIFINDEX) failed: No such device Failed initializing wireless card(s): mon0
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Two network cards, which provides internet?

I have mainly found questions on how to set up one network interface to have a certain IP address and the other on a different network, but I am interesting in what happens if I have two network cards ...
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32 views

What is the correct way to restart nmcli interface remotely?

On Ubuntu 18.04, NetworkManager is used. After modifying the configuration of an interface remotely, using the NetworkManager CLI. Example: nmcli connection modify (interface_profile_name) ipv4....
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ubuntu not query my local dns

I've a Windows Domain Controller, 192.168.1.1 with DNS service. I mapped mypc.mydomain.local to 192.168.1.2 and registered in DNS. If I want to reach mypc.mydomain.local from a client, for example ...
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Site unreachable + URL check: timeout

During installation of a software in the PC I got problems with grub system in Ubuntu 18.04.4 Desktop, which I resolved copying, from an installation iso image, the /bin/bash folder: Missing operating ...
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Vmware Workstation MAAS power Error

I have deployed MAAS stable version. Now when i commission a node vmware guest using NAT. I got error. Need help. No route to host. I have allow firewall and allow all ports as mentioned in a link ...
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Slow Internet on Ubuntu 18.04

As of 4 days ago, my internet speed has become really slow on my Ubuntu 18.04 laptop. I don't know why. I think what might have triggered it is I was doing a pg_dump of a large postgres database. I ...
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docker-registry, kubernetes, haproxy, and https

So, I have a website I'm writing on my Windows 10 machine using VSCode. It has an extension that lets me view my container registry charm (by containers maintainer), so I can see my stuff in there. ...
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“Simple”? ISC DHCP set-up using POE switch for cctv cameras

I want to use a headless ubuntu server setup on a SBC to connect to and record from cameras through a POE switch only.. no router. Can an ISC DHCP installation be used for this? (Or is there a ...
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How to monitor paths of incoming network requests directly?

I am running ubuntu server 18.04 with nginx and php-fpm 7.2. I have multiple domain names hosted on the same server. How can i monitor the incoming traffic on all the websites on my server using ...
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Any IPv6 SLAAC server software for Debian Stretch / Buster? [closed]

I'm configuring a private network where I run a small Debian VM as the gateway for the network. Hosts in the network are provisioned by automated programs so IPv4 static IP is easy to assign, but I ...
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Martian packets when set up VMware

In VMware's Virtual Network Editor I configured vmnet8 to be a NAT with subnet IP 192.168.0.0. That is the same subnet as my wireless connection. Internet stopped working and I did not immediately ...
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1answer
36 views

Remount CIFS on network reconnect

I have a CIFS network share mounted on /etc/fstab at boot on a laptop connected to the wireless network. My fstab looks like this: //192.168.0.100/MyShare /mnt/MyShare cifs username=<username&...
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Ubuntu-Touch and Openvpn

I have installed Ubuntu-touch on a Oneplus-one. I use ExpressVPN as a service, and I have followed the one tutorial on how to setup a VPN with OpenVPN on Ubuntu-touch, an error message partially ...
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Port Forwarding Example: Test Failure Troubleshooting

This is a follow-up question to the example Troubleshooting Local Port Forwarding Example Attempts to reproduce a Local Port Forwarding example on 16.04 with the command: $ ssh -L 8080:www.slashdot....
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School Ubuntu Server: pfsense or iptablet? Fileserver?

I'm a teacher on a Secondary School from Argentina. We have an old PC (Pentium Dual Core, 2 GB DDR2, 1 TB HDD) with Ubuntu Server 18.04 running with Samba Server, since all the computers in the ...
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Ubuntu 19.10 randomly losing WiFi connection

WiFi network randomly disconnects, sometimes after few hours, sometimes every one minute. When it happends I have to reconnect manually and this is very frustrating. Looks like it is associated with ...
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Wifi only works after reboot - how to comepltely reset wifi?

Wifi occasionally doesn't work after wake from sleep (Ubuntu 19.10, Lenovo Yoga). It works if I reboot. So it must be a software problem. How do I completely reset wifi? I'm doing this at the moment: ...
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How to create OpenVPN client files?

I was following this tutorial (Digital Ocean: setting up OpenVPN on Debian 8) until I got to this line: export KEY_COUNTRY="US". Apparently everything after and including that is changed. I managed ...
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SSH : connect to host 192.xx port 22: connection refused

I have 18.04 two PCs connected through LAN cable. I am able to ping PC2 from PC1. But when I try SSH to PC@ I get the following error ssh agd@192.168.1.211 ssh: connect to host 192.168.1.211 port 22: ...
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issue curl command from remote WAN

The goal is to send commands to a thermostat from a WAN offsite network. A thermostat sits behind a firewall at 192.168.1.5. Because it was designed to blindly accept commands: I am reluctant to ...
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Connecting to a VPN on a remote linux server (VPS) fails

I've been trying to connect to a VPN through my Ubuntu VPS, but every time I try, the server shuts down. Perhaps the connection blocks the ssh, and all the traffic when I try to connect? I tried ...
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can't log in with my password during ssh connection

my /etc/ssh/ssh_config is as follows # This is the ssh client system-wide configuration file. See # ssh_config(5) for more information. This file provides defaults for # users, and the values can ...
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1answer
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Internet connection as a hotspot

My computer does not have a wired network connection, it only has a WiFi card. In Windows 10 I can just click a button to turn my WiFi internet into a hotspot. As far as I can tell this is about the ...
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IPTABLES problem in LXC container

I have set of iptables rules running on Raspian RPI (Ubuntu 14.4). For example entry like this: /sbin/iptables -A INPUT -p tcp --dport 8080 -i eth0 -m mac --mac-source 84:f3:eb:b7:45:42 -j ACCEPT It ...
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Nested screen Capture through RDP

I have a Ubuntu 18.04 machine through which i am able to run rdp to a windows 8.1 machine using remmina or vinagre or vnc. That windows machine has a kVM adaptor over usb interface which is capturing ...
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Make deluge use wlan0 but be able to access from eth0

Ok, explanation of what I want to achieve. I have an ubuntu server 18.04 with this setup: Router Internet <-> ethernet via eth0=192.168.0.10 / gw 192.168.0.1 Router Internet VPN <-> ...
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Sftp Ubuntu server [closed]

I have set up an sftp server using Ubuntu. I have tested with credentials that I will be giving the outside company and it drops to the exact place I need it to. I have some Internal users will need ...
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WiFi disabled and black screen after suspend | Ubuntu 18.04

Good morning, I went through many Debian based distros only not to find any help or support for the issues I encountered, so I decided to go for Ubuntu. DISCLAIMER: I feel like this is important. ...
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wifi cant connect without wifi wireless usb adapter lenovo G40-80 with ubuntu 18.04.3 LTS

so i have laptop lenovo G40-80 with ubuntu 18.04.3 LTS, it cant connect wifi without wifi wireless usb adapter, i've used this solution sudo add-apt-repository ppa:hanipouspilot/ideapad-laptop sudo ...
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Scanning for WiFi networks - Difference between “iw” and “iw dev”

I am curious what the "dev" addition does in terms of output results or functionality of the command. sudo iw wlan0 scan vs sudo iw dev wlan0 scan
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VNStat Incorrect Usage Stats

I'm trying to monitor total bandwidth usage of a month's period and kill a process if it exceed a certain threshold. It seemed to be OK last month however when i run the below, it shows my usage as ...
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Archer T6E AC1300 Cannot Install Driver From Disc

I'm trying to install Ubuntu for a friend. That PC has an Archer T6E AC1300 PCIe WiFi card. We try to install the driver from the disc no success and then we go to additional drivers no success please ...
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2answers
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DynDns is not reachable from own network, but works with proxy

I have setup an ubuntu server with a web server i want to port-forward. I tried accessing the IP over proxy and it worked. I have set a dyndns and over a web proxy this worked too. But when i type it ...
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1answer
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Need Help on Ubuntu Server 18.04.1 Static Routing

I'm a newbie when it comes to Ubuntu Server. And I am currently having a difficult time configuring a Static Route. I have an Asterisk Server Hosted on my Ubuntu Server Machine, It has 2 NICs enter ...
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1answer
44 views

Ethernet stoped working on laptop Acer Aspire E15 after updating backports [closed]

I have Acer Aspire E15 (E5-576G-55Y4) with installed Ubuntu 14.04.5 LTS x86. Due to compatibility issues with the tip that I need, I can't upgrade to the version above. I just updated backports due ...
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1answer
55 views

Why won't my Ubuntu 19.10 connect to the internet?

I am using Ubuntu on a USB. When I do ifconfig, it always says "no wireless extensions" for lo and the others don't exist. When I go to settings, the WiFi settings says that I need a WiFi adapter. So ...
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How to forward all local SMTP requests on port 25 to a remote SMTP server on port 587

I'm trying to solve a problem with a bulky program that is, for some reason, only sending email over port 25, even when port 587 is specified. In this answer, someone suggests using the windows ...
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16.04: Switch to static IP after Ethernet disconnected

My Ubuntu 16.04 system connects to a LAN by Ethernet w/ DHCP (say 10.128.10.2). When I unplug that Ethernet cord, I want my machine to switch to a local static ip (say 192.168.10.2) on that same ...
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Trying to route traffic through a tunnel server error: “Nexthop has invalid gateway”

Short version: we have servers in another data center and we have an openvpn tunnel between them. For the first time, I need to hang server on a different subnet from the tunnel server and I'm ...
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1answer
30 views

Unable to add multiple static routes in netplan in Ubuntu 18.04 LTS

I have 2 interfaces on an ubuntu 18.04 LTS system. The primary f0 is for all the internet facing traffic and also vpn traffic. The f1 is for internal traffic. My netplan is as follows: ...
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How to fix internet connection in Ubuntu 18.0.4

I just did an upgrade to 18.04 LTS and it seems that the internet is not working even if it connects to wireless. I know that there are already several questions on the same topic, but I couldn't find ...
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Access folder from windows with domain by samba

Hello I have Linux machine with Ubuntu 18.04 on corporate network. We login into Windows machines with domain credentials like: corp_domain/username On my linux machine I am not logging by domain ...

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