Questions tagged [networking]

Managing and using network connectivity on a Ubuntu system

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Cannot Access Network Manager

I followed the instructions at: https://openzfs.github.io/openzfs-docs/Getting%20Started/Ubuntu/Ubuntu%2022.04%20Root%20on%20ZFS.html The only modifications I made were to add partitions for SLOG, and ...
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Network interface intermittently cuts out

I recently re-imaged my 2014 Mac mini to run Ubuntu Server 22.04 and Plex. I've done similar things with earlier Mac mini models and Ubuntu 18.04 and 20.04 over the years, with zero issues. However, ...
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Ubuntu 20.04: Wireless Disappears Randomly

A while after getting a new router, I started experiencing a problem with wireless networking on my Ubuntu 20.04 laptop. When I turn it on, it detects my wireless network and connects to it. However, ...
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Bluetooth not working with Intel AX200 on Ubuntu despite Wifi working

My self-built computer won't detect any Bluetooth devices although it can connect with Wifi. My AX200 uses this PCIe adapter. On the adapter, the light signaling Wifi is working is on but the ...
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wifi not working on fresh ubuntu 22.04 installation

linux kernel - 5.15.0-37-generic ubuntu 22.04 inxi -Nazy: Network: Device-1: Realtek RTL8822CE 802.11ac PCIe Wireless Network Adapter vendor: Hewlett-Packard driver: N/A modules: rtw88_8822ce ...
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Driver for AX88179 Gigabit Ethernet

I have the following Ethernet to USB-C adapter: $ lsusb | grep Ethernet Bus 002 Device 003: ID 0b95:1790 ASIX Electronics Corp. AX88179 Gigabit Ethernet When plugged into the USB-C port, it may work ...
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VPN routing to another subnet

I have Wifi router TP-Link Archer C7, which configured as Gateway and OpenVPN server: GW 192.168.33.1, Mask 255.255.128.0 I have switch with connected 3 devices with static IP: 192.168.1.200, 192.168....
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impossible to repair/reinstall resolve.conf

the link of my /etc/resolve.conf is broken (screen resolve.conf missing), i try to reinstall it but i cant (error when i try to reinstall it) i also try to install it by using wget but my dns missing ...
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Ubuntu server vlan configure

Hi guys new to vlan on Ubuntu server. Do you need to bridge the vlan to the nic port. I have never set up a vlan on Ubuntu server on yaml
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Can ping and resolve DNS, but no internet access

I have Ubuntu 20.04 on a VPS. Just two days ago, i was wondering why both my websites went offline (Cloudflare gives error 522). Upon SSHing into it I immediately figured out some weird issue that ...
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Slow speed downloads on wsl2 ububntu [closed]

I am very new to wsl2. It was working perfectly fine for about 3 days, and then any network downloads, updates, repository cloning, it crawls at about 45kb. Windows is screaming fast. to my knowledge ...
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how to connect from lan to same lan indirectly through the internet

odd question here, but testing this might help me out with something diffent. I have a LAN, on this lan i have a laptop (dual boot) and a nas (linux based) to which i have access through the internet ...
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Not access to Dashboard remotely (BTFS Node)

I have a VPS - Ubuntu 20.04, located in Germany, i installed BTFS script v. 2.1.3 - BTTC on it, working without issues. I log to the server through PUTTY on my Windows machine - setting a tunnel L5003 ...
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How to install ELK(elasticsearch, Logstash, Kibana) on a ubuntu 22.04 vm running on remote server without internet?

So I am brand new to both ubuntu and ELK and have to set up a Elasticsearch cluster using multiple VMs now i am stuck at how do I install ELK on those VMs without having internet access any help or ...
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How do I port forward from my host to docker container?

I am running netmaker which is a wireguard mesh VPN service on a Docker container, and I need port 9981 to be reachable from the Docker container, so that I can access port 9981 via my Wireguard WAN. ...
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Activation of network connection failed after connection drops

Similar to this question: Activation of network connection failed, but I have the following issue. The machine boots and connects to wifi on bootup, but if the connection drops (for any reason), then ...
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Ubuntu Server Error in network definition: expected scalar / Identation error?

Trying config de network in Ubuntu Server i use nano text: network: version: renderer: networkd ethernets: ens160: dhcp: no adresses: [172.00.000.000/24] gateway: [172....
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Printing to a network printer kyocera taskalfa from ubuntu 20.04

I managed to connect a kyocera taskalfa 2201 printer on network to an ubuntu 20.04 pc, unforunately I am not able to print. Print is getting spooled, but later a message comes "printing stopped&...
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Can't connect to ethernet with ubuntu server 22.04

I recently did a clean install of Ubuntu server 22.04, but ethernet doesn't work. During installation, it shows the ethernet controller but I can only choose "continue without network". ...
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X55 Qualcomm Snapdragon ESIM setup on Ubuntu 22.04

Can't find an answer to this anywhere so in case it's already been answered I apologize. I wish to use ESIM with my lenovo laptop and have installed the x55 Qualcomm Snapdragon and activated the ESIM ...
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Firewall allows only port 22 but I can still curl via http. Need help

I am struggling to get the Ubuntu firewall working as desired. I have set up a Database on an Ubuntu 20.04.3 LTS. I would like to be able to block request such as curl -G --data-urlencode "...
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GNS3 Ubuntu virtual machine NGINX server does not ping devices

I have created a network topology in GNS3 and my purpose was to install my flask app on the Ubuntu Desktop Guest 20.10 and run it from there. My app should connect to the devices via ssh that I have ...
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Surfshark and OpenVPN redirects

On the request below someone wants to redirect the inquiries for the local network so that when trying to connect to other systems within same network and have that system also able to be connected to ...
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Multiple IPs shown when only one exists possibly causing random/temporary Internet loss

I don't believe I made any changes recently, so thinking maybe an apt update somewhere plays a role. When logging in, my WAN IP WAS the only one displayed as expected. Recently, we've had random WAN ...
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Issues Realtak ethernet driver ubuntu 20.04, kernel 5.4 building rtl r8101-1.037.01 driver

I have Realtek RTL 810xE PCI Express Fast Ethernet controller for my Laptop running on Ubuntu 20.04, Kernel version 5.4.0-1074-gke. When i try to update ubuntu this driver is missing and i downloaded ...
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Ubuntu docker daemon sets default policy as drop breaks networkmanager "shared to other computers feature" until a reboot

About I am currently running ubuntu 22.04 running Network Manager: version 1.36 I am looking to share my wifi interface which is connected to the internet with the device connected on eth0 ethernet ...
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Unable to receive UDP packets

I am trying to send UDP packets from Network Simulator 3 (NS-3) to a Multi-threaded python server(Using UDP socket) but I am unable to receive the packet on the server-side. From the host machine, I ...
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sudo apt update problem [duplicate]

valenton@valenton:~$ sudo apt update E: Conflicting values set for option Signed-By regarding source https://dl.winehq.org/wine-builds/ubuntu/ jammy: /usr/share/keyrings/winehq-archive.key != /usr/...
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How to delete bridge permently

I use sudo brctl delbr br0 but its back after reboot. I also tryd sudo brctl delif br0. But it always back after rebooting. cat /etc/network/interfaces # interfaces(5) file used by ifup(8) and ifdown(...
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Macbook pro 2017 15' won't connect to WIFI

I downloaded Ubuntu 22.04 on my 2017 15' Mac but I can't seem to get the WIFI to work. I checked my internet driver and found out that it was BCM43602. After some searching online, I found out that I ...
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how to connect cloudflared and adguardhome (custom dns resolver)?

How do I make {cloudflare-warp, cloudflared} on one side and adguardhome on the other? adguardhome works instead of resolvd. so i have systemd-resolved muted by design. signs of a problem: status bar ...
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Can't connect to internet anymore on Ubuntu 22.04

Everything worked well until yesterday; suddenly, my screen froze. After a couple of minutes, it unfroze, but I don't have a network connection (neither Ethernet nor WIFI) anymore. The problem does ...
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Ubuntu 22.04 Activation of Network Connection Failed

I have tried all the methods I have found but nothing works. The connection I am trying to get to work is wired ethernet, the cable goes to the wall socket, back to a tp-link tl-sg108, which takes the ...
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UFW blocking allowed traffic

I added 3 ports to ufw config (via ufw allow <port>): 22 (and ufw allow ssh) 1234 4444 running curl <ip>:1234 returns the expected JSON response from a running python flask server and is ...
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How to unset proxy in ubuntu?

when I installing ubuntu server 20.04, I set a proxy.when I use apt-get update, there have a error(Could not connect to 192.168.0.116:10809 (192.168.0.116). - connect (111: Connection refused)).How ...
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Wifi is disabled after a time of being unused

I have this problem occasionally on Ubuntu 20.04. After a period of not using the computer, I get 'unable to load - check spelling' response from internet pages (or something similar). It turns out ...
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bluetooth not working in ubuntu 22.04

rfkill status: ID TYPE DEVICE SOFT HARD 0 wlan hp-wifi unblocked unblocked 1 bluetooth hp-bluetooth unblocked unblocked 2 wlan ...
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How to bring up Broadcom NetXtreme 57504 Quad-Port Interfaces?

I'm setting up a Cluster of servers. They're Dell R650 with an Intel CPU. There are 2 network cards per server. Two builtin 1G ports and a 4-port Broadcom card with 25GBs with SFP28-Slots. We bought ...
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Wifi adapter not recognised on ubuntu 22.04 on alienware X15 r2

I recently bought Alienware X15 r2, hoping to dual boot Ubuntu on a separate SSD (with windows 11) and leverage the GPU for ML work. I was able to install Ubuntu 22.04 LTS, the basic version however ...
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Rapid 7 scan documentation or report for Ubuntu

Is there any Rapid 7 scan documentation or report for Ubuntu? There are few things like Partition Mounting Weakness, ICMP redirection enabled, No password for Grub, UPnP SSDP Traffic Amplification ...
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ubuntu 18.04 -> 20.04 ; internet fails after sleep

I have upgraded my laptop from 18.04 to 20.04. Every thing works fine - wifi up and running, internet browsing ok. But after a sleep period - even if Wifi is on, and despite IP address has been ...
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Continued issue with kex_exchange_identification: Connection closed by remote host

I've recently set up an ubuntu server on an old Dell Optiplex. I can remote in via ssh when on the same network. However, when I try to ssh in from a different network using the public IP, I get the ...
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Get EHOSTUNREACH for registry.npmjs.org IPv6 address

My laptop is running 22.04, and my DSL router allows for IPv6 addresses on the LAN. There is not a public IPv6 address for my network, only an IPv4 address. I am able to reach all kinds of addresses ...
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Low performance with ethernet bridge

I have an Ubuntu 20.04 server with 2 NICs, both of which are part of (separate) bridges and one of them also handles VLANs. It connects to a managed switch and finally into a trunk port on my firewall ...
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Ubuntu 20.04.4 LTS ethernet sudden stop working - network UNCLAIMED

I have a PC and just installed ubuntu for about 1 month. Everything worked will until now, the internet stopped. My router lights are on indicates that cable is connected in the device but the Network ...
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Cannot access internet from second ubuntu machine on virtualbox

I have two virtual machines: ubuntu-gateway: connected to a NAT interface (IP: 10.0.2.15/24) and a host-only network (192.168.56.104/24) ubuntu-vm-1 (another vm): connected to the host-only network (...
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How can I find the IP of my NTP server on Ubuntu 22.04?

I tried to do both of the methods [here][1] to find the IP of my NTP server, but I was unable to do so successfully. In fact, the second method does not list the NTP server. Ironically, I need to find ...
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Proxychains error ubuntu 20.04

When i try connect to VPS I get error sudo proxychains ssh –D 127.0.0.1:8181 root@91.162.112.54 [sudo] пароль для noname: [proxychains] config file found: /etc/proxychains.conf [proxychains] ...
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DHCP test script

I would like to write a simple test script which can test the DHCPD. Below are my settings. interface=eth0 dhcp-range=192.168.100.2,192.168.100.11,255.255.255.0,192.168.100.255,86400s dhcp-option=...
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Ubuntu 20.04 TP-LINK TL-WN725N Nano USB Wireless N adapter issue

I've successfully compiled and installed the drivers as following: sudo apt-get update sudo apt-get install linux-headers-$(uname -r) build-essential git git clone https://github.com/lwfinger/...
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