Questions tagged [networking]

For questions on connecting devices together so that they can communicate with each other, as well as questions on networking equipment such as routers and switches.

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Ubuntu 20.04 Hyper V Unable to Connect to Internet

I have a dedicated Server and i got 2 ip address in different subnets xxx.xxx.33.116 xxx.xxx.38.127. I have configured a Hyper V Virtual External Switch for the Ubuntu Vm. I have put the Static ip ...
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Best way to share wireless connection to multiple wired machines

In my small company (15 machines), we currently have a router which has the WAN connection. A switch is then connected to this router. And all other machines are wired to this switch. It works fine. ...
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Use a Wi-Fi Range Extender with a network switch? [duplicate]

Most Wi-Fi Range Extenders advert that the embedded Ethernet port allows to connect wired devices, such that the Extender works as a "wireless adapter". E.g.: connect a wired TV to a ...
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Single IP left subnet and routing traffic through tunnel in strongswan

I must set up an ipsec tunnel to use an external service provided by another company (so I have no control on the other side and can't change anything there). Let's say that: 192.168.0.0/24 is my ...
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2 votes
1 answer
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Ethernet doesn't have a valid IP configuration

I got a new modem and router, same manufacturer, did my research spoke with my isp and got my modem activated and configured. My entire setup is hardwired. coax from pole to modem, cat5 from modem ...
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Add a IP to another rule matching hex in iptables linux

iptables -t raw -A PREROUTING -p udp --dport 4578 -m string --hex-string '|fefffffffffffffffff77f12|' How can I whitelist the IP having the above hexx string automatically on Iptables. I'll be ...
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Ubuntu 20.04 - Realtek RTL8723BE - No Networks shown in Wifi Select A Network

The onboard Ethernet does not detect a network cable plugged in. The onboard Wireless 'functions' but does not list wireless networks. Opening 'Select a network' shows 'No Networks'. Wireless is ...
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Setup two (or more) routers in a single network as 1 big network

I'm sure this question was asked before in different shapes but even with my basic understanding of networking terms, I'm still struggling to solve this simple task.. So I have 2 routers in my home ...
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1 answer
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Traceroute output : what is the correct path?

I am trying to understand and draw network path from traceroute output. An example output looks like below: Suppose I want to draw the path between 3rd and 4th hop. Is it right to assume that there ...
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1 vote
1 answer
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Can't ping VirtualBox guest IP, but can access services via port forwarding

I have VirtualBox set up with two network interfaces (one NAT and one host-only). I've been using this VM to do web development for a long time. Recently upon booting it up, I'm no longer able to ping ...
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How can I make Android Studio run the app on the phone plugged into the local computer over a remote connection?

I am remoting into another PC on my home network and want to be able to run my app on the phone that I plug into my laptop. How can I accomplish this? I've already tried sharing the drives via the RDP ...
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How to do "source-MAC based routing" with nftables

(This is a simplified version of this: Can Linux do "source MAC based routing?") I have an appliance that needs to route egress packets back to the MAC interface where the ingress packets ...
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How do auto-switch to normal network if openvpn connection drops?

I have an Raspberry pi 4 that needs to be online all the time. It provides this connection with openvpn, but in rare cases it cannot access the vpn server on openvpn. Is there a setting that can ...
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1 vote
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Why does network traffic stop on one switch port, when the box on a different port is turned off?

Problem background I have a router that functions fine. I get about 100MB/s, this is bog standard TCP/IP that I feed into a Netgear 8-port Prosafe Gigabit switch. The router output feeds into port 1 ...
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2 answers
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Unable to setup port-forwarding through Dynamic DNS (DDNS)

I am trying to enable the ability to connect to my router from outside my network through a Dynamic DNS and I am stuck on port forwarding. I have setup a Dynamic DNS through my router with url X.ddns....
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Xfinity Wifi not listed on available networks

I have two laptops each with a 2.4 ghz frequency (only) internal wireless adapter as well as an old (2007) USB 2.4 wireless adapter that I can use but is large and clunky. The newest internal adapter (...
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1 answer
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How does Tor's second node know the key to decript the second layer?

I was watching this video explaining how tor works: https://youtu.be/QRYzre4bf7I It explains it with the example of 3 intermediate nodes between client and server. It says that each of the nodes can ...
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Web browsers unreliable in WSL2 + xfce4 + xrdp

I'm running an xfce4 desktop in WSL2 via xrdp from my local machine (I'm running Windows 10, so I can't use WSLg). This mostly works fine, except that web browsers (I've tried Firefox and Chromium) ...
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Nokia G-0425G-A GPON duplicates wifi networks

A few days ago I changed my ISP and the new one does not allow using my own GPON router or media converter. The provider wants their device to be the the one, connected to the optic cable, so I ...
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Accessing SSH on multiple devices connected to the same home-router (Port-forwarding solution)

So, I have multiple devices connected to my router via ethernet cables. All devices have some kind of SSH-service running and are reachable over the WAN/Internet via "ssh user@public.ip.adress&...
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Subnetting with VLSM

Hello I am new to networking and I am a bit confused. I need to subnet this with VLSM, I think I need 6 subnets if I'm not mistaken. I don't really know how to determine all the hosts needed in each ...
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2 answers
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sftp/ssh connection works on network but not from outside

Okay, this is a weird one. I normally don't ask questions here, but I'm about 5 hours in and my brain is melting. I have set up a sftp server on my network with the following attributes in my ...
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New ftp user created and now I can't access website over my wifi network

I have created a new FTP user and now I can't access my website over my wifi address. I have checked if it is banned/blocked in Cpanel or in the application and everything was good. As soon as I go ...
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How to turn off MAC Address Broadcast

My router detects a MAC address broadcast from my computer every two minutes. I checked Wireshark and found out that my PC sends a MAC address broadcast to the network every two minutes. This ...
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How to troubleshoot Android connected device (Better Together) enrollment issues on Chromebook (CrOS)?

I've posted this up on the Chromebook Support community forum, but have not received a single answer in three days. I'll copy & paste it here just in case the original thread breaks: I have a T-...
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How can I RDP to a Hyper V virtual machine with Windows server 2022 standard

I have a dedicated server at CloudSouth running Windows server 2019. I have several dedicated IP addresses (virtual IP addresses) on my host machine for SSL purposes. I created a virtual machine ...
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Using my second computer as proxy

I'm on Windows 10. I want to use my second computer as a proxy. I have to set this command in my cmd: netsh winhttp set proxy 10.10.10.10:1111. My question is which IP address and port number do I ...
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A wrongly configured network

There are allegedly six mistakes in the following network: I was able to identify four: Host A4's IP address 192.168.10.40 is subnet A's broadcast address. Host A5's IP address 192.168.10.39 is ...
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Why does Windows 7's Resource Monitor indicate 12 Mbps of Network I/O while it also indicates ~10MB/s of Network Activity?

I saw the following: Why does Windows 7's Resource Monitor indicate 12 Mbps of Network I/O while it also indicates ~10MB/s of Network Activity?
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How to decapsulate tunnel and forward inner packets

I am trying to decapsulate tunneled packets arriving at port eth0 and forward them decapsulated to another port eth1 on a Ubuntu 20.04 machine like this: ____________ ...
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Cant ping over direct fiber connection using static ip addresses win10 to ubuntu 20.04

So far have not been able to get my pc direct connected to my server and I am hoping someone can see where I have gone wrong or what I have missed. I have searched through many posts and spent some ...
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Connect two networks by WAN port, not vpn

I got a job in a big company as IT manager. Because some problems in the past they had, I want to separate each sector with a different network. But I want to each computer from specific network see ...
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CentOS/RHEL: How to disconnect established connection and prevent subsequent connections until reboot?

I'm trying to test a system that uses multiple interconnected hosts, with one of the hosts randomly selected as the leader and the others being members. The members connect to the leader on a specific ...
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Can Linux do "source MAC based routing?"

I'm looking for a way in Linux to perform source-MAC based routing. My goal is to have a router with the following routing: echo 100 inbound >> /etc/iproute2/rt_tables ip rule add iif eth0 ...
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Putty warning host key does not match

I rebooted my AWS EC2 instance, and now when I try to connect via SSH or FTP, I get the putty warning about a potential security breach and that the host key doesn't match the one cached in the ...
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iperf speed slow in one direction

I have a Lenovo ThinkCentre M910q running Ubuntu 20.04 with an onboard Intel I219-LM Gigabit ethernet interface connected to Netgear R7000 router via Cat5e. I also have a Windows 11 PC with a Realtek ...
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Upgrading OpenVPN 2.4.7 to 2.5.6 results in frequent disconnects

When using OpenVPN 2.4.7 on my server (Ubuntu Server 20.04) and connecting from a 2.5.6 client (also Ubuntu 20.04), I can connect with no issue. However, when I try to use OpenVPN 2.5.6 on the server, ...
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Is it anyhow possible to use QoS with DSCP in Windows10 Home?

I know gpedit.msc is not available in Windows10 Home versions in general. However I have came across to an article which let me install this policy editor (and I believe all required components too): ...
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Can you connect 2 networks from 2 different providers to 1 motherboard?

I was unhappy with the reliability of the broadband offered by my mobile service provider, but they've made it so there isn't a TV plan I'm happy with w/o broadband, so I'm still connected to them. I ...
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WSL2 connect to host without disabling the windows firewall

I simply want to connect from my WSL2 Ubuntu installation to my host windows on port 8529. What I tried: Disabled my public firewall. This works but is no option. I added bash, wsl, and the ubuntu ...
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Port ownership when accessing an Internet address

Let's say we're accessing the google.com:443 server. Port 443 is used here, is it an internal port that is issued by the operating system to the google server, or is it the port of the router that, ...
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Do multiple SSIDs provide additional security?

I am trying to learn more about home networking and have been experimenting with a Netgear Nighthawk R8000P Router. I noticed that it offers different SSIDs, and initial searches seemed to suggest ...
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What is personal-agent on port 5555 and How can I use one? [closed]

A port 5555 is running in my router? After googling, I found that the port is used for personal-agent service? I want to know for what is this service for? If it is useful how can I use it?
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samba share access from windows to ubuntu with Microsoft account

I want to access a samba share folder hosted on my ubuntu machine from my windows machine using file explorer. If I create a local windows account using the same username as the ubuntu machine it ...
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Servers health check using python [closed]

I want to check using Python the servers health (fans, temperature, memory and etc) in our DC. I want to know what is the best way to do this. I found, for example, a python package that gives me this ...
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-1 votes
1 answer
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Isolating my work computer

My employer has supplied me with a work computer, a MacBook, which contains classified/proprietary information. I would like to connect it to my home network, but am worried that a) My employer could ...
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Why pinging ipv6 host does not work in this script

I wrote this script to simulate source->router->destination network in both ipv4 and ipv6. The ipv4 works, but the ipv6 does not. Can someone please help me figure out why it is not working? #!/...
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How to get Gbps Connection on multiple LAN ports

My office setup has 1 Server and 1 Proxy server (Windows Server 2008 R2 and Windows 10 respectively). All of our applications are hosted on the Main Server. The proxy server has 2 LAN ports, one on-...
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Device can ping, but not TFTP/GET from the server

I am trying to set up device with GNS3 by using my company cloud site, and I am blocked by tftp service. First of all, here are 2 Cloud Instances I have generated on this cloud site. As listed in this ...
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How to check proxy server speed

I have list with proxy servers: server1 server2 server3 If it possibly to check which proxy server is the fastest (or least loaded)? I look for bash command to check this and have output with some ...
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