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.

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How to disable network printer discovery in Ubuntu 18.04?

There are several open questions regarding older Ubuntu versions but none provide a working answer. Here are the steps I tried: I disabled discovery in cups-browsed configuration I disabled the whole ...
mniess's user avatar
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3 votes
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670 views

WiFi Adapter Not Found in 18.04 on XPS 13 9360

I've been using my XPS 13 9360 under 18.04 for quite a while now, but as of a few days ago, Ubuntu is no longer detecting my wireless adapter. I've tried googling for a solution, but nothing I've ...
churrov2's user avatar
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1 answer
1k views

Ubuntu 18.04 LTS cannot get IP address when directly connected to the internet

I've been playing around with Windows Hyper-V Server 2019 and basically trying to create my own cloud. The weird thing is that I'm unable to get Ubuntu 18.04 LTS & Ubuntu 16.04 LTS to connect to ...
Nick Vanden Eynde's user avatar
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44 views

hosts on school lab network go unreachable by ping, but are accessing the internet

I've got a weird scenario in my high school lab: computers are connected to wifi and the internet kids are on websites, playing games, streaming audio, active internet connection However, when I log ...
ether_joe's user avatar
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6 votes
1 answer
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TCP send performance issue on 18.04

I am playing around with Ubuntu 18.04 and I'm noticing TCP performance regression that prevents me from upgrading my current running servers since they are very latency-sensitive. For my particular ...
octal's user avatar
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3 answers
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Can no longer reach the internet

Got a new router and my ubuntu computer is the only device on my network that can no longer connect to the internet. It's connected via ethernet. I'm on 18.04.3 LTS and here's what my ip addr show ...
TJ Gillis's user avatar
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165 views

Ethernet speed drop to 10Mbs when connecting to LAN

I have trouble reading video from a camera's encoder address. The address is on my LAN, and I am connected to this network through ethernet. Everytime I start my computer and plug my ethernet cable ...
Bletsu's user avatar
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4 votes
1 answer
2k views

TP-Link Archer T2U Nano AC600 not working after upgrade to 19.10

In Ubuntu 19.04 I managed to get the TP-Link Archer T2U Nano AC600 WiFi adapter working using TP-Link AC600 Archer T2U Nano driver for Ubuntu 18.04 . After upgrading to 19.10, it no longer works. I ...
JPi's user avatar
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3 votes
0 answers
2k views

DNS resolve stopped working after 19.10 update

I have this rather curious problem I have no idea how to debug -- I've updated a server from 19.04 to 19.10, and now the server cannot do DNS queries any more. For instance: $ nslookup google.com ...
Anteru's user avatar
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2 votes
1 answer
725 views

How to transfer a file from my Ubuntu Server in VirtualBox to my local Ubuntu machine?

I am trying to transfer a file from my Ubuntu Server 18.04 installed in VirtualBox to my local machine, but I can't get it work. The network in place is NAT, in VirtualBox I have set port forwarding. ...
xaander1's user avatar
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Unable to install/run cloudflared

I have been setting up Pi-hole today and want to use Cloudflared for DNS-over-HTTPS. I have tried a couple different tutorials but I always get stuck on using cloudflared --version. pi@pi-hole:~ $ ls ...
Cole P.'s user avatar
1 vote
1 answer
1k views

Cannot connect to Wi-Fi Ubuntu 18.04 (Secure boot disabled)

I cannot connect to Wi-Fi on my HP 15-DA0330TU Notebook. Everytime it says "No Wi-Fi adapter found". I had ran into this problem previously, but disabling secure boot in BIOS/EFI had helped then. Now, ...
Aritri's user avatar
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1 answer
231 views

System services (including SSH) not starting after editing /etc/resolv.conf and rebooting

I am running Ubuntu Server 18.04. I wanted to add a nameserver to my machine yesterday (remote soyoustart dedicated server) and I ended up deleting /etc/resolv.conf while trying to figure it out. I ...
Kieran South's user avatar
2 votes
1 answer
971 views

XPS13 7390 wireless stopped working on 19.10 after update yesterday

Yes, I am fairly new to Linux. Long story short, I have the XPS13 dev. Went from 18.04 LTS to 19.04 and all working. THen upgraded to 19.10 last week and wireless stopped working. I have the Killer ...
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193 views

Ubuntu limiting the internet bandwith

Recently we have noticed that a few computers at work that use Ubuntu are having their internet speed limited. We tried every troubleshooting method we could think of (more or less in this order): - ...
Thiago Feliciano's user avatar
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4k views

Unable to ping default gateway in guest vm (QEMU/KVM) after upgrading Linux kernel to 4.11

I have a host Ubuntu16.04 and I used QEMU/KVM (3.0.0) to create a Windows guest VM, and networking went smoothly. But I need to enable nested virtualization so I upgraded Linux kernel version to 4.11 (...
Corey's user avatar
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Virtualbox Ubuntu 19.10 - can ping 8.8.8.8 but can't resolve google

setup the latest virtualbox on Windows, with a VM of Ubuntu 19.10 (fresh install no changes done). In the guest VM, I'm able to ping 8.8.8.8 successfully, However, I can't browse google and when I ...
toto333's user avatar
1 vote
1 answer
370 views

Sharing Wifi To Ethernet Problem

I'm trying to share my wifi connection from a lubuntu 18.04 machine over Ethernet, where the The Ethernet cable is then plugged in to a switch where I can connect other computers and devices for ...
Ryan's user avatar
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1 vote
0 answers
201 views

Server not reachable after "service networking restart"

I just had a problem with my iptables, so I tried to use: service networking restart I lost the connection to all of my VM's (running a proxmox server). So I rebooted the master server, where I ...
darkey34's user avatar
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111 views

I'm running 18.04 LTS server with KVM and cannot connect to the VMs from my local network

Hi I've successfully installed KVM and built several different machines both Windows and Linux, and they can all see the internet and run, but from my local 192.168.1.0 network, I cannot connect to ...
skbutt's user avatar
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1 answer
452 views

Network sharing mounted device. Guest access - permission problem. U.18.04

When I am sharing some folder from some of my mounted device, let's say usb pendrive, with the guest access option, the other network linux PC when accessing that folder says: Failed to mount Windows ...
kjahsdf kjhkj's user avatar
3 votes
2 answers
11k views

Intel Wireless AC 9462 not working w/ 18.04 LTS

So here we go again. Yet another Wi-Fi problem in a clean Ubuntu 18.04 LTS installation. dmesg | grep iwl gives me this: [ 1.644366] iwlwifi 0000:00:14.3: enabling device (0000 -> 0002) [ 1....
Hrijul Bhatnagar's user avatar
2 votes
1 answer
134 views

SSH conection problem after write an invalid alias

I've made a new alias in the remote machine /.bashrc, since I did it and I close the session I just can't log in again using the shh protocol. As you can see in the code, when I try to log in, the ...
Pablo Ruiz's user avatar
2 votes
1 answer
4k views

Ubuntu Server 18.04 — Use nmcli to (only) discover wifi networks but don’t interfere with netplan and networkd

Ubuntu Server 18.04 now uses netplan to manage ethernet and wifi devices. I’d like to be able to discover wifi networks via nmcli, as I’d like to use php-wifi in one projects. Is it somehow possible ...
fooness's user avatar
  • 21
1 vote
1 answer
1k views

ICMP is not getting disabled

I am trying to disable ICMP services. For this the following configuration lines have been added into the /etc/sysctl.conf file net.ipv4.icmp_echo_ignore_all = 1 net.ipv4....
Prithvi's user avatar
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1 vote
0 answers
464 views

livepatch apparmor="DENIED"?

I've just installed canonical-livepatch on Ubuntu Server 16.04.6 LTS and when I try to register the machine I get this on the enable command: 2019/10/20 11:33:55 error executing enable: cannot enable ...
TommyPeanuts's user avatar
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1 vote
0 answers
50 views

Can I respond to a dialogue box via terminal? Or start up screen share from terminal?

I can ssh into computer B from computer A, but when I want to share a screen it asks computer B for permission. Is there a way to respond to that dialogue box from an ssh in terminal? The computer ...
Rookey's user avatar
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1 vote
0 answers
497 views

Why does libreoffice soffice.bin process CONSTANTLY RECEIVE internet bandwidth ? Malware ? Virus ? What?

Why does libreoffice soffice.bin process CONSTANTLY RECEIVE internet traffic ? This is according to BOTH NetHogs and Gnome System Monitor. I was curious about KB/sec internet IO numbers that ...
Marc Cox's user avatar
2 votes
1 answer
5k views

Ubuntu not recognizing Archer T4U US 3.0 properly

I recently formatted my computer and bought a wireless adapter for it Archer T4U US 3.0 from tp link. I have been trying to get it to work but at first it did not recognize the wifi adapter, so I ...
Enmanuel Durán's user avatar
0 votes
2 answers
274 views

Configure Machine as both Web Server and Router

Let me preface by saying I have very little experience on the networking side of things. Context: I have a machine running Ubuntu 18.04 LTS (bionic-dev) that hosts a web page on port 8050. This ...
Rekamanon's user avatar
  • 101
0 votes
0 answers
723 views

How to check if a port is blocked by my ISP?

My little backstory here is that I am trying to connect via ssh to a postgres remote database set up by heroku, --> Connecting to postgresql-slippery-32494 psql: could not connect to server: No ...
Anon's user avatar
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9 votes
3 answers
19k views

Wifi-Disabled: Ubuntu 19.10 - Intel Wireless 7265

After updating to Ubuntu 19.10: Clicking Continue using.. get resetted back to Do not use... Tried to download drivers from the Microsoft website and put them into lib/firmware. The WiFi works ...
0leg's user avatar
  • 311
0 votes
0 answers
3k views

Installing driver requires me to "make clean" but no rule to make target 'clean'

Step 2.2 says to run the commands make followed by make clean but nothing happens make: No targets found and no makefile found make clean: No rule to make target 'clean' Output of ls /lib/modules/...
Retsek's user avatar
  • 155
0 votes
1 answer
144 views

Reverse SSH tunnel to allow others to use my machine as a jumping station

I'm running ubuntu 18.04. I have a server that I SSH to, but I first need to turn on a VPN for that to work. I want to enable other users to SSH to a port on my machine, in order for them to reach ...
KdgDev's user avatar
  • 263
4 votes
1 answer
13k views

Commandline L2TP connection?

I'm looking to connect to a L2TP VPN server, from ubuntu commandline. Ubuntu 18.04. I've already done it via a desktop ubuntu. By which I mean: added l2tp network manager, configured it and connected ...
KdgDev's user avatar
  • 263
3 votes
2 answers
133 views

Computer freezes after local web content is accessed from another device

I use Ubuntu 16.04 in my computer. I run LAMP for development of PHP. Whenever I access the web content from another device (Android browser) using IP address of my computer (192.168.0.104), my ...
Barun's user avatar
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1 vote
1 answer
2k views

openvpn error outines:SSL_CTX_use_certificate:ca md too weak

On Ubunto 16 I've configured openVPN with password with Certificate (TSL) my config file is: dev tun remote XX.XX.XXX.X ca ca.crt cert user_name.crt key user_name.key ns-cert-type server It does ...
Rnu's user avatar
  • 41
1 vote
0 answers
778 views

Curl, git, other commands hang while trying to download file

Currently on Ubuntu 18.04.12, when I try to download something from the terminal, or push to git or any similar command it always hangs on the download either indefinitely or for a very long time. ...
Francesco Carzaniga's user avatar
0 votes
1 answer
320 views

Ubuntu Server 18.04 LTS - Unable to change IPv4 settings duing setup

During setup on Ubuntu Server 18.04 LTS, I have problems setting up manual IPv4. I'm enter the following: Subnet: 255.255.255.0/24 Address: 192.168.0.50 Under address I get the following error: '...
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4 votes
0 answers
914 views

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 ...
birdman's user avatar
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1 vote
0 answers
301 views

Network don't recognize Printer's Scanner "Ricoh"

I have a "Ricoh Aficio MP 2851" Printer/scanner/fax all in one used on top of a my home router. On Windows, it works fine using TWAIN. On Ubuntu 20.04: The printer is found automatically. ...
Abd-Elaziz Sharaf's user avatar
-1 votes
1 answer
623 views

how to change public IP address

I'm having issue with my ubuntu + virtualmin. I'm getting blocked from YouTube for getting information. And want to change my public IP address. I've tried with Dedicated IP in virtualmin and by ...
Ibrahim Ch's user avatar
0 votes
1 answer
4k views

Wireless Woes: iwlwifi-8265 - Ubuntu 18.04 (and Mint Tara)

I am trying to set up two machines, both have identical hardware that should be supported by the newer Linux kernels. The wireless card inside is a GIGABYTE "GC-WB867D-I" Wifi+Bluetooth. Out of the ...
Slinky's user avatar
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1 vote
0 answers
28 views

How to find fastest mirror link during every installation [duplicate]

This is the problem: sometimes I connected to internet via VPN (this VPN server could be in countries like USA, UK and etc) sometimes I connected to internet without VPN. When I connected to internet ...
user avatar
0 votes
1 answer
2k views

Wifi internet connection keeps dropping. Need to restart NetworkManager always to work

I have a problem with my WiFi internet connection. It keeps dropping even-though I'm still connected to the network. The thing I did always when it occurs is to type this command: sudo systemctl ...
Gabz Dumax's user avatar
3 votes
0 answers
6k views

Samba Winbindd Failing Everyday

Everyday morning on my domain controller running samba 4.7.6-ubuntu winbind fails, If I try to run the command wbinfo -u (to list all users) I get the error could not obtain winbind interface ...
Dan's user avatar
  • 471
0 votes
1 answer
818 views

Ubuntu server 19.04 internet connection problem

I have already installed Ubuntu server. I plugged in ethernet cabel and i have not got internet connection. After run ifconfig result is: lo: flags=73<IP,LOOPBACK,RUNNING> mtu 65536 inet 127.0....
EnumGame's user avatar
1 vote
0 answers
675 views

Ubuntu 18.04 not working with Panda Wireless PAU09 on USB 3.0

Recently received a Panda Wireless PAU09. It works fine on any of the computer's USB 2.0 ports, but not USB 3.0 ports. USB 3.0 ports are functional, as they can connect to other USB devices. lsusb ...
Bintz's user avatar
  • 111
2 votes
2 answers
2k views

Not able to connect to internet when both ethernet and wifi is connected in Ubuntu 16.04

I have Ubuntu 16.04 (machine 1) and Windows 10 (machine2). I have connected the ubuntu to the wifi with IP 192.168.0.110 and I can browse internet easily. I have to do remote C++ development on ...
S Andrew's user avatar
  • 484
1 vote
2 answers
2k views

WiFi disables after suspending

newbie Ubuntu MATE user here. First off, I know this is a well documented issue, i've tried multiple solutions from various sites and none of them worked. I'm running Ubuntu 18.04.3, and whenever i ...
plex's user avatar
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