Questions tagged [networking]

Managing and using network connectivity on a Ubuntu system

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What is freezing my remote terminal session to my Ubuntu 14.04 server when I enable socks tunneling in my browser?

I am new to Ubuntu and am using a remote server with Ubuntu 14.04 installed on it (headless). I use putty (on a Windows laptop) to connect to it - ssh with private and public keys. I have also set up ...
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routeur technicolor td5130 v3

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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14 views

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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1answer
26 views

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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2answers
81 views

How to fix failing connection to SAMBA print share (Ubuntu 19.10)?

I have lately installed Ubuntu 19.10 and wanted to connect to the printing services on a local network, shared for linux users via SAMBA. While this worked flawlessly with 18.04/18.10, it's stopped to ...
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1answer
3k views

Share Windows 8.1 Folder with Ubuntu 14.04

I have two standalone PC's. One is Windows 8.1 and the other is Ubuntu 14.04. I have a working network between the two. Each machine can ping the other and I have Internet shared via Ethernet from the ...
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0answers
20 views

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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0answers
10 views

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
125 views
+50

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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2answers
3k views

netplan bridge: no connection to/from virtual machine

I'd like to setup a brigde on my host (Ubuntu 18.04 server) to get a connection to the internet from/to my virtual machine (also Ubuntu 18.04 server), both with netplan. The host is a dedicated ...
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0answers
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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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1answer
4k views

How to disconnect internet when VPN fails?

Normally I'm connected to the Internet with a VPN, but sometimes it fails and some programs may automatically start to use the default unsecure connection. How do I disconnect all the internet until ...
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0answers
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TP-Link AC600 Archer T2U Nano driver for Ubuntu 18.04 not working

My Ubuntu version is 18.04.3 LTS The laptop is Asus G46V I followed the steps here but with no luck. Here is the first solution: sudo apt install git dkms git clone https://github.com/jeremyb31/...
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3answers
410 views

Realtek ethernet driver issue, network unclaimed, ubuntu 18.04

i'm getting error network UNCLAIMED, and i see through the forums that it states the drivers. well, my kernel is 5.3.0-20-generic, and it states when i try to install the drivers, its the latest...and ...
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1answer
30 views

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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5answers
25k views

Samba Share user/password error after update

this is the first time that I couldn't find an answer so this is my first question. I will provide as much information as possible. I have an ASUS router that has 2 HDDs. There is only 1 username/...
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1answer
28 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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0answers
17 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
1k views

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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1answer
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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1answer
2k views

apt-get — Specify source IP address

Is it possible to specify the client's IP address (i.e. the source network interface, like eth0, eth0:0, eth0:1...) to which apt-get should bind when it has to connect to the network (for instance ...
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1answer
3k views

How can I configure wired network connection on 64-bit Ubuntu 12.04 LTS?

I've just installed my first linux installation on a donated computer that I plan to network and use it as a shared storage drive for all of our pictures and videos. We have a DSL modem with both ...
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0answers
10 views

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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1answer
28 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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0answers
11 views

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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1answer
4k views

burp: The proxy server is refusing connections from another computer

Ubuntu 12.04.5 LTS (Precise) 32-bit desktop. I have installed burp (an intercepting Proxy), and it works for programs run from the same computer, but when I try to connect from another computer on ...
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0answers
20 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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0answers
29 views

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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1answer
3k views

Ubuntu 12.04 wired connection doesn't work!

I just installed Ubuntu again after a few months of using Windows. At first I tried to install it by using an .ISO file, but I got stuck at 43% on the partitioner, so I figured out I should use the ...
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0answers
19 views

“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 ...
9
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3answers
4k views

ERR_NETWORK_CHANGED on Chrome with Ubuntu 17.04

When I use Google Chrome (currently 61, but the error exists before), I constantly get ERR_NETWORK_CHANGED. Often, the webpage reloads and works a second later, but often things simply don't work. For ...
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0answers
397 views

QLogic BCM57800 gets no link

I am running a Dell PowerEdge 820 with a QLogic (Formerly Broadcom) NetXtreme II BCM57800 NIC. It has 4 ports and I am using the first fibre optics port. This card is controlled by the bnx2x kernel ...
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1answer
19 views

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 ...
0
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1answer
113 views

PC to router to router, what's the IP of the first router?

Tl;dr: PC connect do router that is connected to the service provider's router. I can access the service provider router (192.168.1.1) but I can't connect to my own router. I live in a rented with a ...
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0answers
25 views

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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0answers
26 views

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 ...
0
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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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29 views

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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0answers
20 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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1answer
602 views

Wi-fi speed dramatically low on Ubuntu vs Windows

I have just installed Ubuntu 14.04 on my machine. My kernel version is: 3.16.0-34-generic My problem is that download speed in Ubuntu (measured via speedtest.net) is 0.78 Mbps while on Windows (...
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2answers
401 views

How to permanently install WiFi driver Realtek 8723DE in Ubuntu 18.04

I installed Ubuntu 18.04 on my brand-new (2019) HP 15-da1005dx laptop, in dual boot with Windows 10. Unfortunately, ubuntu 18 does not support the Realtek 8723 Wi-Fi adapter, so when Ubuntu starts I ...
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7answers
236k views

How do I find my network IP address, netmask, and gateway info?

I'm trying to make my IP address static as I hear it fixes slow browsing issues. When I click on connection information under the networking menu of the gray taskbar, it tells me about the IP address,...
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0answers
42 views

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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0answers
25 views

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 ...
2
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1answer
96 views

Dell XPS 15 7590 lost WiFi

A couple of months ago, I got a new XPS 15 (7590). I immediately installed Ubuntu 19.10, and had no problems, everything worked great. Yesterday, after not using it for several days, I attempted to ...
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5answers
14k views

LAN connection does not work after upgrade to 18.04

I just updated my laptop from 17.10 to 18.04 LTS. However, only my wifi connection still works, while the lan connection is not able to work anymore. I saw that others ran into similar issues after ...
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0answers
11 views

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 ...
3
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3answers
9k views

Connected to wifi, but no internet [16.04]

Just moved into university and am able to connect to wifi, but not to the internet (using ubuntu 16.04). I get internet on other wifi connections but not this one. Here are my settings: This wifi ...
1
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1answer
4k views

Is there a way to debug wireless access point issues that was setup with hostapd?

I am trying to setup a wireless access point with a home PC. I replaced my old Intel wifi link 5100 with Atheros AR9462. I recently did a fresh Ubuntu Server 16.04 install. To setup wireless access ...
0
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2answers
47 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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