Questions tagged [networking]

Managing and using network connectivity on a Ubuntu system

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Driver for USB WiFi dongle Realtek RTL8811AU chipset and Ubuntu Server 20.04

I'm running Ubuntu Server 20.04 on an ODROID H2+. I purchased an WiFi USB dongle based on the Realtek RTL8811AU chipset.. I cannot get it to work. I've tried three different drivers: The driver here: ...
2 votes
1 answer
3k views

WiFi and Bluetooth can't work simultaneously!

Issue: My laptop disconnects from the network (not only the internet, I am not even able to ping the router) after few seconds when I am using my Bluetooth Mouse (Logitech MX Anywhere 2S). This could ...
0 votes
0 answers
12 views

How to use my existing windows server 2016 r2 standard active directory to authenticate samba share on ubuntu 22.04LTS Desktop acting as sambaserver?

I have a windows server 2016 r2 standard DC with AD DS setup, I am building a samba server on the latest Ubuntu 22.04LTS Desktop. I need to create samba share on the ubuntu and use the active ...
2 votes
3 answers
6k views

Can I setup subdomain.hostname.local on a home network?

I have hosts alpha.local and beta.local running on my home network, the network is managed by a (very) simple wireless router. I can access the servers using, for example, ssh alpha or http://beta....
0 votes
0 answers
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Viber no internet connection on ubuntu 22.04

I installed the Viber application on my Lenovo x1 carbon 3rd gen laptop. But when I opened the Viber application, there was a "no internet connection warning" message showing me. Please give ...
7 votes
1 answer
16k views

snmpwalk -Of does not display textual OID

We are having problem running this snmpwalk on Ubuntu server 14.04. snmpwalk -v 2c -Of -c public localhost Or snmpwalk -v 2c -Of -m SNMPv2-MIB -c public localhost Both of them do not display the ...
1 vote
1 answer
45 views

Why is Ubuntu 20.04.3 internet access not working?

My Ubuntu OS is connected to the my working internet network, but any internet-reliant services have not been functioning properly. This includes downloading anything (including any packages from the ...
3 votes
3 answers
5k views

I clean installed 20.04 LTS but now I have no network

I was running 16.04 LTS (32 bit) And decided to upgrade to 20.04 LTS. I removed the drive with 16.04 on it and installed a new SSD. I installed via DVD from downloaded iso. Once it is installed and I ...
1 vote
1 answer
47 views

Netifaces gives KeyError: 2 while running from cron

I want to schedule a cron job for running a server client application during startup. What I did is crontab -e and then put the following line @reboot cd path/to/folder && /usr/bin/sh /home/...
0 votes
1 answer
38 views

How to prevent my computer from connecting to a specific site

I recently decided to make the switch to Ubuntu. And I had a question pertaining to site connections. Before beginning, I need to give some context. I am/was addicted to youtube. I think at my peak in ...
-1 votes
0 answers
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How do I install Ubuntu using VMware on Windows 10? [duplicate]

Does anyone know about this? I need help. So that I can install Ubuntu using Vmware on my windows 10.
0 votes
1 answer
4k views

bind9 - unable to resolve external names

EDIT: Now works, but please see comment below. I have setup bind9 following this tutorial. I am now able to ping my NS by name, as well as my main computer, each of which I correctly entered A & ...
0 votes
1 answer
4k views

Samba shares not accessible from Windows 8.1 with Ubuntu 14.04 LTS

Here is my smb.conf file as obtained after using the "sudo system-config-samba" command # # Sample configuration file for the Samba suite for Debian GNU/Linux. # # # This is the main Samba ...
0 votes
0 answers
15 views

Troubleshooting Linux Router Access [closed]

The backup server tries to access the production server through SSH, but a router problem occurs. Ping is also unable to shoot the operating server, so if you know how to solve the Linux router ...
1 vote
0 answers
31 views

NIC Teaming in Ubuntu 20.04 LTS

I'm naive to Linux flavours (like Ubuntu, Centos, etc). I've been googling on how to setup NIC teaming in Ubuntu 20.04 LTS, reading mostly using /etc/network/interfaces. But, I couldn't find '...
1 vote
2 answers
3k views

Networking.service takes 5 minutes after uninstalling network-manager

I tried the Solution here to no avail, using sudo systemctl edit networking.service and adding TimeoutStartSec=10sec. But sudo systemd-analyze blame still puts networking.service at over 5 minutes. I ...
2 votes
2 answers
3k views

wlan0 interface is missing

Whan I ran;: ifconfig eth0 Link encap:Ethernet HWaddr xxxxxxxxxxxxxxxxx inet addr:192.168.1.7 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: xxxxxxxxxxxxxxxxxxxxxx ...
0 votes
0 answers
22 views

Can't connect to wifi after changing the wifi router

I recently changed my router. The new router has 2g and 5g feature. I configured it with the same name. But there is an awkward situation here. My laptop can't find the 2g but it is working on 5g. ...
0 votes
0 answers
18 views

How to transfer files to my Ubuntu Home Server

Im a completely at a loss I got a homeserver running Ubuntu Server i have 2 games running on it Terraria/valheim I am trying to transfer savegame data from my mac(client) to my Linux(server) I thought ...
0 votes
0 answers
35 views

Ubuntu 22.04 LTS: Wireless connection issue while on external HDMI-Monitor

I sometimes have network issues (no signal, slow upload, etc.) and I think I finally can reproduce them: I noticed a strange behavior between my wifi and my external HDMI port / monitor. Configuration ...
-2 votes
1 answer
37 views

How do I cut using the delimiter? [closed]

Can someone help me to use cut command to remove daemon.warning below? Jun 23 15:10:47 MC41241492 daemon.warning [vrrpd] VRRP:state_init Jun 23 15:10:47 MC41241492 daemon.warning [vrrpd] VRRP ID 255 ...
0 votes
1 answer
31 views

Connecting to multiple Windows RDP via Ubuntu Server

I'm sorry but i always trying to find solutions, search forums etc. but first time i'm lost. This should be easy :( but soo far i fail, maybe i can't comprehend some topics. I have Ubuntu Server 22.04 ...
71 votes
9 answers
242k views

How do I renew my DHCP lease?

Short of rebooting, how can I release and renew my DHCP lease? It would be useful to know a GUI and terminal method. I'd especially like to know if there is a means to do this without requiring admin ...
0 votes
0 answers
8 views

phpMyAdmin under natted port: how to avoid redirect to port 80?

Situtation We have a firewall exposing a 192.168.x.y:80 as public_ip:10080 We configured nginx to listen to 80. We created a domani pointing to public ip accessing to main domain at 10080 serves ...
0 votes
1 answer
13 views

Wifi Adapter not Found for Ubuntu 18.04 Lenovo v14-ADA

I have tried many approach to install driver for my laptop, but still nothing have worked. First I try to find my network controller by hitting lspci, then the output came as follows, Network ...
0 votes
0 answers
16 views

Ubuntu 22.04 hostname not detected from DNS

I have been having an issue with Ubuntu 22.04 not detecting the hostname from the DNS server. I have tried using both the networkd and NetworkManager backends and the server's hostname still appears ...
0 votes
1 answer
1k views

IPSEC/IKEv2 StrongSwan applies only the first route from split-include, the rest is ignored

I have an IPSEC/IKEv2 VPN server (on a MikroTik router) and I'm trying to connect to it from my Ubuntu 20.04.1 LTS system. The server uses x509 certificates and private/public key pairs for ...
4 votes
2 answers
4k views

Bridging LAN and WIFI using netplan not working and killing AP

I'm trying to extend my local LAN network via WiFi and would like all devices in the same network. The setup is as follows: DHCP/DNS server running inside the LAN separate PC linked to the LAN, with ...
0 votes
0 answers
15 views

any way to route IP to IP traffix in linux

source server has two IPs 192.168.100.1 192.168.100.2 And CS has 192.168.200.1 192.168.200.2 Route like this based on destination. 192.168.200.1 -> 192.168.100.1 192.168.200.2 -> 192.168.100.2
0 votes
1 answer
26 views

22.04 - macvlan module missing?

I am trying to copy some lxd containers from a raspberry pi running Ubuntu 20.04 to a raspberry pi running 22.04. The containers use macvlan, which produces the following error if I try to run the ...
3 votes
1 answer
6k views

How to use ASUS PCE-AX58BT wifi card on ubuntu server 18.04.3 with netplan?

UPDATE: The Asus supports final resolution is that the card only runs in PCIe x1 slots and not in x4, x8, x16. That does not make any sense to me but that is what they claim. Potentially related bug ...
1 vote
2 answers
288 views

22.04 802.11 (wifi) firmware failure

I just updated in place (no new harddrive, no new partitions) from 20.04LTS to 22.04LTS. Everything worked except that there is a firmware loading diagnostic (along with a separate failure to compile ...
0 votes
0 answers
15 views

Samba (failed to authinticate user)

Until resently i had no problem using samba server, but now it is glitching. I tried creating new user for samba, remounting drives on PC (windows 10) and i keep getting error 0x80070043 on windows ...
0 votes
0 answers
10 views

Avahi on multi-hop network

I have a multi-hop network and I need to discover the topology of the network from a system which is connected to one of the network elements. My question here is, can I use Avahi for such multi-hop ...
0 votes
0 answers
17 views

Where does systemd-networkd keep DHCP leases when acting as DHCPServer?

I've got an ubuntu 22.04 system as my home router/firewall, and I use systemd-networkd as the DHCP server for the LANs. I have pihole running in a container providing DNS, with the upstream DNS is a ...
2 votes
2 answers
9k views

Installing driver for TP-LINK Archer T9UH AC1900 on Ubuntu 18.04

Recently bought a WiFi booster to combat patchy WiFi in my uni dorm, works perfectly with Windows as driver installation was easy to follow, yet I can't seem to figure out how to install the Ubuntu ...
0 votes
0 answers
19 views

sub-interface on ubuntu 20.04

I would like to add a subinterface on ens192. I don't have a problem setting and using with 2nd or 3rd IP on the same interface. When I am trying to set a subinterface validation has passed on the ...
0 votes
0 answers
15 views

Lubuntu 22.04 no wifi [duplicate]

Firefox and chromium installed with various flavors of Ubuntu causes our old iMac to crash, except on Lubuntu which did not cause a crash. However, lo shows disabled through the nm-tray debug info. nm-...
0 votes
1 answer
50 views

What is the detailed process of bringing up a network interface in Ubuntu 20.04 Server?

Exactly what is the process on bringing up an interface in Ubuntu 20.04? i.e Which process manages this? (Is it systemd-networkd?) And what configuration data does it base this on? Note: I'm not ...
0 votes
1 answer
4k views

PCIe Network card not detected by Ubuntu

My TP-Link TL-WDN4800 wireless network adapter is not recognized by my Ubuntu system. I've run lspci in the terminal, but my results are as such: 00:00.0 Host bridge: Advanced Micro Devices, Inc. ...
0 votes
1 answer
164 views

PXE server - broadcast port restriction on boot client demand

I would like to setup my PXE server to attribute a correct IP-address, only for clients requesting network boot. Therefor I've configured my network adapter with 2 IP addresses on a different range. ...
0 votes
1 answer
81 views

Ubuntu 22.04 shared internet connection with multiple interfaces

I use Lubuntu 22.04 LTS with Cinnamon desktop to be precise. I have one network device with a single interface on my motherboard. enp5s0 is the one connected with my ISP-router, with fixed IP 192.168....
0 votes
2 answers
7k views

Ubuntu 16.04 browser won't connect to proxy server

I'm using Ubuntu 16.04 and access internet behind the college's proxy server which requires authentication credentials. The problem is, at certain places in my college I'm able to access internet, ...
7 votes
3 answers
8k views

How can I configure my firewall to work with Docker?

My computer is hosting an application on port 1234 that should never be accessible from anything but my machine. However, my Docker container (which is running Apache) should be able to access this. ...
0 votes
1 answer
31 views

Cannot access my localhost from any IP address while localhost and 127.0.0.1 can

I am very tired because after completing the web application, I can access it through 127.0.0.1 only. I have a VMware machine with Ubuntu 20.04 IP Address ens33: flags=4163<UP,BROADCAST,RUNNING,...
0 votes
0 answers
31 views

No network driver, ubuntu 20.04.4 server

I tried to install network driver on my newest motherboard, but unable to. Please help. Motherboard: ASUS PRIME Z690-P WIFI D4 Ubuntu: 20.04.4 server Picture of fault
1 vote
0 answers
158 views

Internet connection not working after updating nvidia drivers on kubuntu 21.10

I recently did a fresh install of Kubuntu 21.10 and everything has worked fine for weeks. Yesterday the second monitor suddenly was not recognized anymore, so I tried to update the nvidia drivers. It ...
1 vote
0 answers
40 views

Qualcomm Atheros QCA6174 on Samsung Galaxy Book 12 - No wifi

I've just installed Xubuntu 22.04 on a Samsung Galaxy Book 12 with Qualcomm Atheros QCA6174 and it doesn't work. (Also does not work with Kali 2022.2) the output of the commands are identical on both ...
4 votes
2 answers
5k views

PR_IO_TIMEOUT_ERROR on serveral unrelated sites

A few days ago, I got blocked from certain sites. At first I thought it was gov blocked me from using it. So I fake IP with VPN (use VPN-Gate service + OpenVPN client) to access those sites. However, ...
2 votes
1 answer
3k views

ap-hotspot not working after update to 15.04 (64 bit)

I have recently updated to Ubuntu 15.04 (64 bit). My `ap-hotspot' configuration was functional in the earlier installation. In the current scenario, the devices present around my computer are no ...

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