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.
23,038
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Network Troubles - Cannot Ping Windows PC
I've seen a lot of similar questions but nothing seems to quite describe my situation.
I have a few devices on my network, LinuxPC, WindowsPC, Laptop, and NAS.
From my LinuxPc running Ubunutu 18....
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Why doesn't identity in network settings reflect my spoofed MAC address?
I have installed macchanger and been using it for a little while now just fine. For example, this is what happens when I do the following...
$ sudo ifconfig wlp1s0 down
$ sudo macchanger -r wlp1s0
...
- 172
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Proxy port configuration in lubuntu
I recently installed Lubuntu 18.04 on my laptop (dual-boot with windows) and in the network settings there is not a port option to configure. In my place of work I use a wired connection with a http ...
2
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1
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Wifi breaks all the time - Ubuntu 18.04 - [14e4:4331]
The problem is that my wifi connection breaks all the time irregularly, in the span of after 5 minutes and sometimes after 30 minutes. When this happens I have to sudo service network-manager restart.
...
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1
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Netplan: ipv6 route on link
I'm trying to declare a static ipv6 route on the link using netplan (more precisely I'm trying to setup a default gateway whose address is not on my interface subnet)
Basically what I'm trying to do ...
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0
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1
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900
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How to detect packet sniffers? [closed]
If found, what should one do? What packages or commands should I run to find packet sniffers and what should I do next to defend and protect yourself from it?
- 27
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1
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5k
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NetworkManager not updating /var/run/networkmanager/resolv.conf
My NetworkManager is not writing to /var/run/networkmanager/resolv.conf and NetworkManager not populating resolv.conf is not the answer to my situation, because I don't use resolvconf. More details ...
- 1,045
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0
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175
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What is a connectivity request? [duplicate]
I am trying to diagnose a network problem and noticed that my computer is communicating with an IP address that I'd like to understand. First, all apps on the desktop were closed so the only thing I ...
- 41
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1
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7k
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Wired connection on 18.04 keeps connecting and disconnecting
I have a fresh installation of Ubuntu 18.04 from a bootable USB.
My motherboard PRIME Z390-A has an Intel I219-V Gigabit LAN network card.
I've been trying to fix this for several days now, and it's ...
- 133
28
votes
1
answer
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netplan vs NetworkManager on Ubuntu 18.04 and above
What is the concept of renderer in a netplan configuration file?
What practical difference does it make between choosing a networkd and a NetworkNamager renderer?
Can anyone (in the second case) ...
- 2,121
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0
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1k
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can't access ubuntu's files from windows (samba)
I need to setup samba-share for 2 machines:
Ubuntu: x.x.27.48
Windows: x.x.16.218
These 2 PC is created on AWS within a same VPC and same subnet.
I successfully telnet x.x.27.48 445 from Window.
...
- 535
0
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0
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823
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No internet access after random intervals in Ubuntu 18.04.2 LTS
I use WiFi for connecting to internet using my Ubuntu 18.04.2. It works fine. But, after some random interval of time, the internet connectivity goes down. The WiFi is still on and the device is ...
3
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3
answers
5k
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Use dnsmasq as system DNS service
Following How to disable systemd-resolved and resolve DNS with dnsmasq?
However, I followed it as much as I could, but still wasn't able to properly replace systemd-resolved with dnsmasq --
If i put ...
- 1,045
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398
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ProtonVPN but how do I connect between local machines?
So I have two machines and they are both on ProtonVPN which uses OpenVpn and *.ovpn files. So the server is not on my local net but the clients are. What modifications can I make to either my network ...
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1
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WIFI not working on lenovo yoga 2 13 with ubuntu 18.04
i recently installed ubuntu 18.04 on a lenovo yoga 2 (not pro) and i cant seem to get the wifi on .
in wifi settings it says
**No wifi adapter found
make sure you have wifi adapter ...
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0
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3k
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saned.service Loaded: masked (/dev/null; bad) Active: inactive (dead) Needed for shared Scanner
This is not a duplicate of
"How to map network scanner"
at
How to map network scanner
It does not even mention this error message.
● saned.service
Loaded: masked (/dev/null; bad)
...
- 33
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2
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2k
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No Internet Access after restarting System in Ubuntu 18.04.2 LTS
I am facing one problem with my system having Ubuntu 18.04.2 LTS (recently upgraded). Problem is Wifi is working but No Internet Access, I tried with
nameserver 8.8.8.8
nameserver 8.8.4.4
but ...
2
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0
answers
671
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Error performing TLS handshake: Could not negotiate a supported cipher suite
When connecting to my library's WiFi, the following "Hotspot Login" window opens with a TLS handshake error (title):
If I copy the URL located near the lock icon in the image (blurred out here) into ...
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votes
0
answers
88
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New subnet already exists in MAAS
So, I am creating a new subnet in my MAAS environment. 192.168.0.0/24. When I try to make it, MAAS gives me "Error: Subnet with this Cidr already exists."
Even though the subnet does not exist in the ...
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0
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279
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wlan0 to eth0 Communication
I have a Raspberry Pi 3b+ (AP) working as an Access Point router (hostapd). Its wlan0 is configured with the IP 192.168.4.1.
And I have another Raspberry Pi 3b+ (Node-1) working as a Client. I have ...
0
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0
answers
400
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Printer keeps re-adding itself, adding the wrong printer
I've got a printer networking issue that I'm trying to work out. I work in a public library and our public access computers keep auto-installing the front office printer as well as the public access ...
2
votes
1
answer
310
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How to allow a login/password from certain hosts and force a key-base authentication from others?
When reading How do I restrict a specified SSH user to connect only from one IP or hostname? I came close to solving a problem I have with specific logins - but it does not cover my case.
I need to ...
- 1,315
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1
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Ubuntu does not recognize my Wi-Fi adapter - HP laptop
I posted the same question a while ago, I deleted the last one and opened a new one because I have new information which could be of use
I currently have a partition on my laptop on which I installed ...
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0
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373
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Create Hotspot on orangePi and use another usb wifi for internet access
can we build and design like this image?
board is orangePi
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1
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1k
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How should I connect to a VPN Tunnel from Ubuntu Server 18.04.2 LTS?
I just built an Ubuntu server and I need to connect to a secure tunnel from my client. On our windows servers (to this client) we use TheGreenBow VPN Client. And that works fine.
I bought a License ...
2
votes
0
answers
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First time linux user "wifi adapter" [duplicate]
ubuntu 18,10 no wifi? been trying to figure this out. would someone help me
$ lspci
00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v6/7th Gen Core Processor Host Bridge/DRAM Registers (rev 08)
...
- 21
0
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1
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PC (Ubuntu 18.04.01 Server Edition) and laptop (VMware Ubuntu 18.04.01 Server Edition) linked via cable: ping works only one-way
In order to understand how to eventually make a beowulf cluster, I tried, following this reading Building a simple Beowulf cluster with Ubuntu
to link my PC with Ubuntu 18.04.01 Server Edition with my ...
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1
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Dell Latitude 7490 not detecting sim card
I have dell latitude 7490 it comes with default sim slot in it.
In the connection manager / any where its not showing any kind option to connect and use sim card data..
The device it self is not ...
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0
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535
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e1000e Network Errors in Ubuntu 16.04
I'm having big issues with getting my onboard network cards to work with Ubuntu. I've tried clean installs of 16.04, 18.04 and 18.10, each version reports the cards as being unplugged.
I've tried ...
0
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0
answers
1k
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Access Ubuntu share from Windows 10 and Windows Server 2016
I've got problems with accessing shares of my Ubuntu machine from my Windows 10 PC.
I already tried to edit smb.conf:
min protocol = SMB2
max protocol = SMB2
client min protocol = SMB2
client max ...
1
vote
0
answers
74
views
Port activity after applying iptables
I've applied a rule in the iptables
(Ubuntu x64 18)
sudo iptables -t nat -A OUTPUT -p tcp --dport 64080 -d 172.31.132.86 -j DNAT --to-destination 149.154.167.50:80
sudo iptables -t nat -v -L OUTPUT ...
- 171
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294
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Is it possible to list wi-fi or detect network controller through wine?
guys!
I've googled about this with many different words and didn't find anything about it, except the information that it is not possible to install drivers on Wine, because it would not work.
Well, ...
4
votes
3
answers
22k
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How do I get NetworkManager to assign a fixed MAC address to eth0?
Update - Feb 21, 2020:
I never found an elegant way make NetworkManager assign a particular MAC address to the first/only Ethernet adapter on whatever system my disk happened to boot on. I also ...
- 1,375
13
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2
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How to configure HTTP proxy with authentication on Ubuntu WSL on windows 10?
I am using Ubuntu WSL on Windows 10. How to configure HTTP proxy with authentication on it?
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0
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353
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Where does /etc/services come from?
I am thinking about the evolution of computer networks, and I am looking at /etc/services. There is a lot of information in there, a lot of ports I don't recognize.
I went to IANA Service Name and ...
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0
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ubuntu 14.4 not showing WIFI? [duplicate]
I installed ubuntu 14.4 (x86) on my dell laptop and after installation no wifi showing my on my connection ?
while i run
sudo modprobe -r iwlwfi
result :Modprobe:fatal:module iwlwfi not ...
- 113
0
votes
1
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421
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Ubuntu 18.04 mt7601u Disk Writing Problems
I have newly installed 18.04 on a Dell Optiplex. The desktop is connected to the internet using a wired network and does not have any wifi adapters or dongles attached. I am having problems with ...
13
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2
answers
4k
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How to access internet and run apt-get through a middle server?
I have a machine running ubuntu 16.04. The machine can only access 1 remote server (also running ubuntu). The remote server has full access to internet though.
root@localmachine:~# ifconfig usb0
usb0 ...
- 233
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1
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495
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Unable to login to my remote server using ssh even after providing correct public and private keys
I recently moved away from my windows machine and am now on ubuntu 18.04, however, whenever I try logging in to my remote servers using ssh <username>@<serverIp>, I get a Permission denied ...
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0
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Ubuntu 18.04 LTS. Slow wifi speed Intel Centrino N-100
I have an issue in my laptop. I can't get a decent internet speed via wifi. I can get about 5Mbps. Meanwhile on Windows I have 50-60Mbps. What should I do? My previous netbook didn't have that issue, ...
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3
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1
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6k
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Configuring Bonding of Two 10Gb NICs Using Netplan
I'm running Ubuntu 18.04.2 LTS and I want to bond two 10Gb NICs using LACP up to a Cisco 3850 switch....this is the configuration I'm using but it is not working....I'm editing the YAML file within ...
8
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2
answers
20k
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what happens if ufw firewall is inactive?
I want to know more of what ufw is. I'll ask some questions and you can let me know if i'm right or not.
ufw helps us to block connections or allow connections from specific ip address or whatever. I'...
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1
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MACVLAN Bridge in netplan
I configured LXD containers in Ubuntu 18.04 with MACVLAN interfaces so they can DHCP addresses on my LAN. This all works fine, the containers are reachable on my LAN and they can reach each other, but ...
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0
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200
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Need help setting up Docker Home Media server
So I am attempting to put together a home media server on Ubuntu 18.04. I have done this in a VM on a Windows machine, but a recently built a new gaming rig, and am repurposing the old one into a ...
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1
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1k
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Can't acces samba server
I have Ubuntu 16.04 VPS. I installed a samba server there. It works locally with localhost, with external IP and with a domain. But I can't access it from my Windows 10 computer. I don't have an ...
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2
answers
2k
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Apache in an AWS Instance not starting
I had an instance with AWS, decided to upgrade the plan of that instance and now my instance is not working properly with 2 sites that I had.
I detached the static IP from the old instance and put ...
user928367
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0
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777
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Can't resolve hostnames ubuntu 18.04
Since earlier today i can't resolve any hostname anymore. apt-get update/upgrade fail because of this for example.
I have tried to lookup the IP for some of the sources in /etc/apt/sources/list on ...
- 1
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0
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251
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Ubuntu 18.10 weak wifi signal
This is the same problem I faced in ubuntu 16.04 lts but it got resolved on following the steps mentioned here. I upgraded to ubuntu 18.04 lts and then also above steps worked for me. But in recent ...
0
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1
answer
900
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Error connecting to update server 18.01.04.LTS
I cannot connect to any ubuntu servers (tried several) even though the http/https protocol runs fine on the machine.
I get the same error when I try to update using the software updater.
I checked ...
0
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0
answers
1k
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Connection Failed: Activation of network connection failed
I have Ubuntu 18.04 running on VirtualBox 6.0.4 and I am trying to connect my Xbox one s to the internet via Asix Ethernet adapter. I connected ubuntu to my network but the ethernet connection between ...
- 1