Questions tagged [networking]

Managing and using network connectivity on a Ubuntu system

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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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1answer
278 views

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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1answer
49 views

Unable to authenticate to SAMBA printer [closed]

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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20 views

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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2answers
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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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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. Let's name it dc.mydomain.local . I mapped mypc.mydomain.local to 192.168.1.2 and registered in DNS. In my client's network card I've ...
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1answer
30 views

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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27 views

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 [closed]

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
47 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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21 views

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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1answer
68 views

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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2answers
55 views

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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1answer
43 views

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
32 views

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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19 views

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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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
28 views

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
29 views

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
66 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 views

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
37 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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1answer
29 views

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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24 views

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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Installing a Dual Band Wirless USB Adapter on Ubuntu 19.10 [duplicate]

I bought the following: SAVFY 600Mbps WiFi Adapter Wireless USB PC Dual Band Lan Network with Antenna 802.11AC for Windows Mac Linux System Description: 1.600 Mbps dual band 2.4/5.8GHz USB Adapter ...
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2answers
175 views

Ubuntu 18.04 DNS resolution fails after a while

When I ping google.com on my Ubuntu 18.04, it gives me ping: google.com: Temporary failure in name resolution I would then proceed to run sudo service systemd-resolved start My /etc/resolv.conf ...
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Ubuntu 16.04 Server causes entire LAN to flap intermittently when connected

Machine: Dell Precision T5600 Server OS: Ubuntu 16.04 Server Programs running: Eve-ng, Apache web server on port 591 instead of 80 I've ruled out the following: -- No conflicting IP's on the (3 ...
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39 views

18.04 HP Pavilion desktop “No Wi-fi Adapter Found” [duplicate]

This Q has been asked times before on here, going by a search for the message, but all the answers have been immensely convoluted and impractical in my situation. I have installed Ubuntu on many other ...
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1answer
42 views

Gnome shell hangs if network disconnect with cifs mount on

I'm using ubuntu 18.04 and I need to check some logs from windows shares. I mount these shares with this command: sudo mount -v -t cifs -o username=me,password=pass //network-adr/logs ~/mylocaldir/...
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34 views

Netplan configuration not persistent

I have my eth0 interface configured with netplan with static IP address. I have applied the changes using 'netplan apply'. The interface gets the static IP address so its fine. But after a while, ...