Questions tagged [lan]

A local area network, or LAN for short, is a computer network that connects computers in a small area.

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Can't get server to make use of 1000Mb/s

I've build my detain 11 home-server with a gigabyte b550 gaming x motherboard. On that board there is a realtek RTL8111/8168/8411 Lan chip. At home I've everywhere cat 6A cables and everywhere I can ...
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How to connect to the four Ethernet ports on a wireless router?

Let's say we are happy with our typical wireless router. But one day we notice it has four LAN ports. We connect an Ethernet cable from one of them to our computer. On our computer do we use: ...
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What is my LAN IP (ubuntu and missing eth0)?

Running 20.04 I am trying to figure out what my LAN IP is on my laptop. If I run ifconfig I get (trimmed down): $ ifconfig docker0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 inet 172....
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How to automatically update new hostnames inside local network?

I'm trying to make some simple decentralized DNS for my local network. The trouble is that every time I add a new machine, the other machines on the net can't find its name automatically because it ...
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Debian Router, UFW, WAN/LAN with IPoE ISP

I have a Debian Bullseye box setup as a router, NAS server, Asterisk PBX, and using PrivateInternetAccess (PIA) as my commercial VPN. Also have the box setup with PiHole to reduce unwanted ads. The ...
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How to connect a CUPS printer to a Fedora box through a firewall?

I have bought a new printer and connected it to my LAN/wifi with an Ethernet cable and I can access the printer from my phone. But when I try to add the printer to CUPS on a Fedora box that is also ...
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Raspberry Pi Wlan Connection Crash/ Multiple networks in parallel

I have a raspberry pi 3 model b which uses LAN to connect to my router (fritz box, internet, ...) and in parallel a wlan connection to a different wlan router (a tello drone providing a wlan network). ...
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mint mate 20.2 network stops working after restart since change

my system stopped working right, maybe last patch maybe i did something wrong. please look into it,and maybe somebody has a solution,what or how i can change it to get it working again the main isuse ...
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Unable To Access Port Forwarded Content via Domain Name/Public IP Address From Within LAN

I have iptables setup to forward Traefik ports 80 and 443 to WAN, and am able to view the content via my public IP address and registered domain name from outside of my LAN (tested on mobile with WiFi ...
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Is it possible to distinguish between needing a regular cable and crossover cable from the CLI?

The value of /sys/class/net/ethX/carrier can be used to determine if the computer is connected or not. Is it possible to make the destinction between being connected to a hub/switch are another ...
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udev without LAN access?

I am running a RPi 4b with Raspbian (Bullseye), Logitech Media Server (LMS) 8.2.0 and Squeezelite 1.9.9. For automated startup of the Squeezelite process whenever a certain USB device is connected, I ...
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How to connect Linux Mint to internet via Windows PC with USB modem on the same LAN?

So I have a setup like this: The windows PC is my work PC and has a USB tethering to the internet provided with a huavei box that has a sim card in it. For that connection, I have set up internet ...
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PHY (Backplane) doesn't link to my NIC

I need to find out something about the auto-negotiation because the PHY VSC8489 doesn't build a link with my NIC. Maybe this is because the auto-negotiation isn't successful regarding the supported ...
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How does ping command work internally

I have Ubuntu 18.04 and two network interfaces (eth0 & wlan0) attached to it. So, I have effectively two LAN's (say LAN1 and LAN2) When I fire a ping command simply like ping followed by some IPv4/...
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make socat listen for a packet from a specific mac adress

So not long ago I figured out how to make socat listen for a magic packet on a specified UDP port in order to trigger a script. You can find this post here. All that I did is described in detail. What ...
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make socat constantly listen for the magic packet

I have a RPi 1b+ v1.2 with Raspbery Pi OS June 2021. I'm using socat to trigger a bash script that wakes another pc in the network up. I use this command: sudo socat UDP-LISTEN:10 EXEC:scripts/pi-wol....
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When connected to Wifi I am unable to ping directly connected computer

I'm running the latest version of Pop! Os. I have a laptop connected to my main computer via an ethernet cable. The laptop IP is 169.254.83.40 and my main computer IP is 169.254.83.50 on the connected ...
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Connecting two different networks through wifi routers [closed]

I am trying to connect two different networks by using the following layout: On the network 1 I have a computer/laptop with ip address 10.0.0.2/24 connected by Ethernet interface (eth0) through a ...
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Bad Internet Causes Bad Local SSH connect

I'm running into an issue that has me scratching my head a bit and can't seem to find the right information online to clear things up for me. networking has never been strongest subject, but hopefully,...
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Trouble connecting to a LAN device

I have a measurement device (an Agilent frequency counter) that I want to communicate with directly via it's LAN interface. However, my Ubuntu 20.04 laptop does not seem to want to establish a ...
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How to deny traffic to and from all devices on LAN except Internet Gateway with UFW?

On a local network with range 192.168.0.0/24 and a router with fixed IP 192.168.0.1, how can you configure one specific computer (needs Internet access) to deny communication from and to all other ...
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Can I force router changes from linux CLI, like port forwarding with UPNP?

I have seen that I can use miniupnp to apply port forwarding on my router, and I would like to find another tool to apply DNS and/or DHCP settings on the router. Is this possible? My goal is to have a ...
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route traffic from LAN to the internet via a raspberry pi

I have a cluster of raspberry pis and I have one RPi acting as a NAT (called piNAT). The piNAT is connected to the internet and is also connected to the cluster of raspberry pis successfully. They are ...
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How is the LAN IP connected to the machine name?

I can't find how/where the LAN ip is connected to my machine name such that anyone typing the machine name (host name) will be directed to the IP. I know the machine name is under /etc/hostname/ but ...
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Share apt upgrade packages between systems on the same lan [duplicate]

I have a bunch of clusters of Raspberry with Raspberry OS installed, they have all the same configuration and the same packages installed. I want to keep them updated but they are connected to ...
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Can Access LAMP over LAN, CANNOT Access Sites

I can view a directory of my LAMP server running on Ubuntu 20.04 over my LAN using my mobile phone's web browser, when I type http://192.168.X.XXX. However, I can not access any of the sites/...
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How to know on which LAN a machine is connected?

I have two LANs (192.168.1.0/24 and 192.168.2.0/24) linked by VPN. I have one machine (RPI3b+) that I can be connected on the first or the second LAN (I move it). How can I know where is the machine ...
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How to measure entire! LAN load for example with ntopng?

Is it possible to measure LAN load in the same way as it possible to measure CPU usage with top, i.e. in percent? For example, if I have 1 gigabit network, then how to know, how much of these bits are ...
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lan intranet only Ubuntu 18.04.4 - wordpress under apache2 is not available to android or IOS but is completely available from WIN10 client

I have recently installed Apache2 on a stable installation of Ubuntu server 18.04.4 and completely installed a working version of wordpress which is working for internal development work. I can't ...
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Can't resolve hostname.local on LAN

I used to be able to ssh user@hostname.local between machines on my LAN but it is no longer working. I can ssh using the IP of course, but it's DHCP so it may change from time to time. Both machines ...
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dnsmasq behaving strangely: dig returns result for dns lookup, yet ping reports "host not found"

Since my router does not resolve hostnames of LAN devices, I setup my server to act as a DNS using DNSMASQ. DNS Server Specs ---------------- OS: Ubuntu Server LAN IP: 192.168.1.4 I have a ...
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Ehternet LAN not working at full speed

I have a PC and a Laptop connected with a ethernet cable. Using ethtool, i found that my speed is 1000Mb/s which is 125MB/s. But, when i am transferring 6GB file i get ~30MB/sec speed. How do i ...
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Cannot understand behaviour of ifup/ifdown and /etc/init-d/networking

I want to connect an IP camera to my laptop which runs Ubuntu. The set up looks like this: Once I have the physical connections, I change my /etc/network/interfaces file from: auto lo iface lo inet ...
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2 votes
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Debian 10 intel i211 LAN not working

I have a newly built computer with MSI MEG X399 CREATION Motherboard, which includes two Ethernet ports with Intel i211 Gigabit Ethernet. I am running Debian 10, but the Ethernet doesn't work. I can't ...
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Stream microphone audio to LAN IP/ PoE speakers?

I have several IP PoE speakers and regular speakers with IP converters connected to common network switch on LAN. What can I use or how can I set up my network so that microphone recorded audio from ...
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Sync multiple PCs every boot via home LAN (local files update old version on server)

I need your precious support and advices for a kind of setup for my home computing. So... I have two laptops and a desktop that I use same (or different) times. Every computer has a different distro (...
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1 vote
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If you ssh to another device in your LAN, can you accidentally connect through a less direct pathway (WAN)?

My question regards ssh, sftp, scp, rsync, etc. commands where you connect to another machine which can be in your Local Area Network (LAN) or at some remote location you would typically connect via ...
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Nginx Domain name setup for LAN

I have a web application running on my linux machine that is accessible at all other network machines via IP address x.x.x.x:3001. I want to use a domain name like myfun.fun so that it can be ...
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CentOS 7 : ip addresses in ifconfig and in network-script are different

Given the CentOS server-like machine: $ uname -a Linux labsm 3.10.0-693.21.1.el7.x86_64 #1 SMP Wed Mar 7 19:03:37 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux EDIT My initial problem was that local ...
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Disable Ethernet connection on Mac terminal

I am trying to write an alias for disabling ethernet connection and use the wifi using a command line. I can't access stackoverflow.com and other sites using ethernet due to corporate policies. Is ...
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How to access a device connected to local network with its hostname?

I tried accessing a webpage in a server within the local network with the hostname of the device followed by its folder path and the name of the file (it is a basic PHP-file). In the first system it ...
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How do I connect to a QNAP [closed]

BACKGROUND DETAILS: I've inhereted a QNAP TS-459U-RP. I currently have it connected to my home router via an ethernet/rj45 cable. My computer is connected to the same router. How do I access the ...
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LAN in Ubuntu server is not reconnected after rebooting modem

I have a computer with some home automation stuff connected to the router via LAN, and I only access the computer through SSH, samba shares, and a web interface that it's hosting. Whenever I power ...
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Get Wireless LAN IPv4 Address Of Device

I want to know the easiest way and I would perfer a single line command that works on most or all Linux distros. I want to get the devices IPv4 address. The reason why I want to know this is because ...
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dual NICs linux

my /etc/iproute2/rt_tables is 255 local 254 main 253 default 0 unspec 1 brain 2 strom I'm using below given /etc/network/interfaces allow-hotplug eth0 iface eth0 inet static hwaddress ...
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2 votes
2 answers
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dnsmasq is not resolving local hostnames

I have a local Linux server running dnsmasq for my LAN. It has been working without issues for the last several years. I keep the operating system and packages regularly updated. After yesterday's ...
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7 votes
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How can I limit engagement with a large office LAN?

I work in a large office building with hundreds of other computers on the same LAN. I don't have any reason to communicate with most of these computers, and when I do, it's always on an "opt-in" basis ...
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3 votes
1 answer
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Access LAN computers via VPN connection

I am wanting to put a VPN server on one of machines on my LAN and expose this VPN service to the internet. Once a client (laptop) is connected to my VPN service from outside my LAN I want to be able ...
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2 votes
3 answers
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How does ssh handle 2 computers on the local network with the same username?

For instance, if one wants to access the account bob on a machine on a local network behind a router, they would simply type: $ ssh -p xx bob@example.com` However, how does ssh handle the ...
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1 vote
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PF Rules to Block All But Accesses to VPN and LAN

The rule set to block all outgoing connections except for VPN access could be like this: block drop all pass on lo0 pass on utun0 pass out proto udp from any to xxx.yyy.zzz.ttt port pppp This works ...
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