Questions tagged [subnet]

A subnetwork, or subnet, is a logically visible subdivision of an IP network.

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Access devices on different subnet on another router - ER-X

Current Network Map My noob question is why any device on network 192.168.10.0/24 can ping any device on network 192.168.1.0/24 and the opposite doesn't work? I need to be able to connect to my ...
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Make a remote host have a local IP address with ARP capability(Steam Link)

Currently I have two subnets in the 10.0.0.0/16, which are 10.40.20.0/24, let's say that's A and 10.32.80.0/24, B. My PC is in the subnet A and what I'm going to do is use Steam Link, Oculus Air Link ...
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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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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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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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Given the IP address 22.181.0.0/21, create subnets starting from this address

Given the IP address, 22.181.0.0/21, subnet the network for the following offices, based on the number of devices for them (The first two columns are given. I've calculated third, fourth and fifth ...
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No internet with DHCP assigned IP and subnet, but works when router configured to static WAN

Trying to configure my Netgear Nighthawk (AT&T) to serve as a modem to my (DD-WRT latest) Buffalo router set as gateway. A YouTube vid instructed me to configure the Nighthawk as IP-passthrough ...
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How do you properly allow two devices on separate subnets to communicate (PFSense)?

I'm trying to figure out how to get 192.168.0.22 to properly ping/be able to transfer files with 192.168.77.10. Firstly, is this a dumb setup? I'm mainly using it right now just for educational ...
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How to correctly set the subnet mask installing Linux Ubuntu 20.04 server? ERROR: '172.16.182.216' is not contained in '255.255.255.0/24'

I am not a system engineer or a network expert (I am more a software developer) I am trying to install an Ubuntu Server using static IP address. I am using the information provided by a collegue. ...
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Subnet cross-access with three routers

I am trying to build a home network with three routers and one switch. My search here and on the internet didn't yield much, partly due to every question being very specific and also me being a novice ...
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Linux Router Middlebox Failing to Initialize Internet Connection

I'm trying to configure a Linux machine as a "middlebox router" that allows a connecting client machine to use the internet connection of the machine itself. It has two physical ethernet ...
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Accessing SMB service on a router other than the one I am connected to

I have two routers, one that also acts as a modem (coax cable,ISP provided,primary router, 192.168.0.1) and one (secondary router,192.168.1.1) that has a USB port to run an SMB service. My problem is ...
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Remote device not accessible from VPN even if under the same subnet

I set up a point-to-point tunnel VPN using a FritzBox between my network and a remote machine. My goal is to reach the remote devices like they are inside my local network. Here the network ...
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how to configure samba to be visible in another subnet

I have a subnet 192.168.1.0/24 and in it I have a smbd/nmbd server The samba server is for example: 192.168.1.25 the gateway/router here is 192.168.1.1 in this subnet there is a cascading router 192....
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Create an additional IP address from the 10.42.12.0/24 subnet on Linux Kali

First of all I'm connected via OpenVPN with another machine. My network configuration looks like this: 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 ...
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Discrepancy when calculating hosts

Background I'm studying subnetting and find my answer to a question does not match that of the instructor. NOTE: This is something I have chosen to learn about myself. Not a course I am required to ...
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Can't access Windows Laptop localhost on Android Phone in same local net

Disclaimer: I know there are a few variants of this problem on this site but none of them helped me solved my problem -- Believe me I'd be more than happy if I didn't have to post another one. Follow-...
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Access IPs who's subnets differ

I have one system that is on 10.0.x.21 and another that is on 10.0.y.21 Is there a simple way to allow those two IPs to communicate? I am trying to create a setup where X and Y can both potentially ...
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How to link two networks together through a windows 10 laptop

I have two networks with subnets 10.0.0.0/24 and 192.168.1.0/24 and I want to link them together so 192.168.1.2 can ping 10.0.0.2 without going through a proxy I do not have access to either router ...
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How to connect to 3 devices on the same subnet with a network adapter card

I have assembled 1 PC with Ubuntu version 20.04.3.LTS. That PC needs to be used to connect to 3 cameras which are sending their data via an ethernet connection using TCP protocol for configuration and ...
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Can't configure Hitron CODA cable modem/router with 192.168.100.x LAN subnet

I had to factory reset this cable modem/router due to some unexplained connectivity issues. For some reason, I cannot provide it a LAN IP on 192.168.100.x. It just fails with this weird engrish ...
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How can I set up two sub networks that can communicate by LAN but where only one has internet?

I have two consumer ISP routers: Virgin Hub 3.0 (connected to the internet) and BT Smart Hub 2, connected to Virgin Hub 3.0 by Ethernet cable. I would like to set up a network where devices connected ...
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Routing of a public IP network

Given a (public) network 198.51.100.0/24 that is routed to HostA and I want to route a subnet of it (say, 198.51.100.16/28) to HostB. HostA and HostB are connected over some sort of point-to-point ...
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Packet filter (firewall) for a /29 network

My ISP routes a /29 network (8 IP addresses). The first and the last is of course network and broadcast address and the second is assigned to the modem by the ISP. The modem has an ethernet LAN port ...
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Cannot access devices on other subnet

I have searched for solution, tried many, but failed. I need your help. This is my network: I have simple network with two subnets : 192.168.2.0/24 and 192.168.5.0/24 Each one is using the same ...
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VPN Client conflict between local IP and VPN IP subnets - Macos NAT layer as solution?

My office is setup with a few subnets. My runabout computer can typically connect to the office over an L2TP VPN connection (setup in the network tab of Macos System Preferences) and access all of the ...
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My IP addresses changed from 192.168.2.xxx to 192.168.1.xxx. I can't reach the switch anymore

My connection is now on fiber and since that was realized, all my IP addresses shifted from 192.168.1.xxx to 192.168.2.xxx. I have tried to revert them back to 192.168.1.xxx, but without luck. Now for ...
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Incoming datagram with source IP from different subnet

Let's assume two PCs connected to each other with ethernet cable: PC1: 192.168.0.1/24 PC2: 192.168.0.129/25 What is the expected behaviour of PC2 in case of getting IP datagram from PC1? If I ...
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Different subnet masks

Let's assume simple topology. PC-1 <-------> PC-2 PC-1: 192.168.0.1/24 PC-2: 192.168.0.129/25 No switches, no routers, just two PCs with static configuration. From PC-1 perspective PC-2 should ...
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subnetting qemu virtual machine

I state that I am a beginner. I have a machine at a datacenter with one public IP assigned and Ubuntu 18.04. I installed kvm-qemu to have a VM with windows. How can I do to have on this VM an address ...
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1 vote
1 answer
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Broadcast to all subnets

Does usage of network broadcast address will imply broadcasting all subnets? For instance, if my network broadcast address is 192.168.0.255 and I have four subnets, will sending a message utilizing ...
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How is the default subnet mask value calculated?

The default subnet masks are three subnet masks that correspond to the standard Class A, B, and C address assignments. Class Binary Dotted-Decimal Network Prefix A ...
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Can one split up a /29 network into two /30 networks?

I have a network from an ISP consisting of eight IP addresses (/29). Let's say it's 1.1.1.0/29. The ISP's gateway is 1.1.1.1. This network should be splitted up so that it can be used by two different ...
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Connect 2 LANs with 1 router

I have a small business with 3 Windows 10 PCs, 2 NVRs, and several cameras. My NVRs cannot monitor more than 16 cameras so I separated the initial single LAN into two LANs by using different IP ...
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Subnetting - 192.168.20.29/28 Valid Host Addressses

I'm in the process of practicing subnetting and came across this question, which I cannot find an explanation online. The question: Given the address 192.168.20.19/28, which of the following are ...
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Why isn't 255.255.249.0 a valid subnet mask?

I was just wondering about this question above and I would greatly appreciate it if someone can explain why 255.255.249.0 isn't a valid subnet mask.
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Does CIDR Notation do away with matching IP/Subnet masks?

With CIDR notation, do IPs and subnet masks need to match? For example, 192.168.0.0 = 255.255.0.0? Or does CIDR do away with this entirely? How does a network know if the host IP address is on the ...
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How many subnets and hosts per subnet can you get from the network 172.31.0.0/19? [closed]

How many subnets and hosts per subnet can you get from the network 172.31.0.0/19?
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Additional Subnet IPs for Hyper-v VM- VSwitches

i recently bought a dedi server from hetzner to use with hyper-v VMs, for the first 6 additional IPs hyper-v worked fine with default(auto) Virtual switch, i just created VMs, attached unique mac ...
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Home network 2 subnets

Network noob here. This is my current home network situation: So I have two ISPs, one VDSL the other over TV cable. Each one has a router with WiFi and an ethernet switch attached to it. Several ...
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What mask for a LAN with two routers / subnets?

I have a main-router connected to ISP and most devices connected to it. It has IP 192.168.0.1 and it's connected clients get IPs in range of 192.168.0.X A second-router connected to this one, will ...
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Device discovery across subnets

I segmented my home network into 2 separate subnets LAN/IoT so that IoT devices cannot attack my PCs and smartphones if compromised. Personal devices get assigned IPs in the range 10.1.1.1 - 10.1.1....
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Is it possible to reach a computer on a network with a static ip that doesn't belong to the subnet?

Let's say I have a router at 192.168.0.1. Let's say it's a /16, so it's routing for 192.168.x.x. I have a desktop on this network at 192.168.0.2. Let's say someone attaches a new system to the network ...
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Is this a valid assignment (made by professor) about dividing hosts into two subnets?

I quote the assignment: "Consider an organization with 4000 hosts. Divide the hosts into two subnets containing 1000 and 3000 hosts. Choose network ID's and define the subnet masks so that the ...
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Establishing Connection to Ethernet Switch

I am trying to configure a basic network for a LAN. The LAN consist of only devices and an Ethernet switch. The devices are using Ubuntu. To configure a basic network, the computers must be on the ...
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1 vote
1 answer
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Assigning subnet IPs to OpenVPN clients in AWS

I have a working OpenVPN server installed on the EC2 instance inside my VPC. It's used to allow remote users to access services inside private subnet. It's been a sufficient solution so far but ...
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OpenVPN - can't connect to clients on a new subnet

I run a server with lots of clients connected to it via OpenVPN and the number of clients slowly grew until it reached over 255 a few days ago. When I was initially setting up the VPN, I had this in ...
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Device category between router and firewall (subnetting but nothing more)

In our office building we are eight small independent offices. In the future we would like to share one internet connection. In order to make sure that we do not access the network of each others we ...
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How exactly is a subnet mask used when determining where to send a packet to?

If you have the subnet mask 255.255.255.0 and a class A IP address, the first octet specifies the network, the last is the individual host. So do the middle 2 octets specify the subnet? And this is ...
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How to setup a virtual subnet?

Ubuntu 20.04 is installed on my machine. A network cable connect it to a network camera. I've installed three virtual machines via VirtualBox on it, one Windows XP and two Ubuntu 12.04. What I need is ...
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