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Questions tagged [subnet]

A subnetwork, or subnet, is a logically visible subdivision of an IP network. The practice of dividing a single network into two or more networks is called subnetting and the networks created are called subnetworks or subnets.

A subnetwork, or subnet, is a logically visible subdivision of an IP network. The practice of dividing a single network into two or more networks is called subnetting and the networks created are called subnetworks or subnets.

Subnetting provides a way to use the number of IPv4 addresses in an optimal way. The previous notation with classes caused a lot of IP's to remain. In the beginning this was not a problem, but these days IPv4 addresses have already depleted at the top level.

Source: wikipedia

Tutorial on subnetting

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How to configure Fedora 34 with three NICs and three subnets to route traffic?

I have a Fedora 34 linux and it has a physical ethernet interface (NIC3), a physical wifi interface (NIC2) and an USB/Ethernet interface (NIC1) (USB LTE Dongle). I would like to use the NIC3 to route all traffic to NIC1. And I would like to keep the…
supi007
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VPN tunnel IP is 172.16.4.2, how can I reverse shell to my local machine, from a box on an attached subnet?

This is the ifconfig: utun2: flags=8051 mtu 1340 options=6403 inet 172.16.4.2 --> 172.16.4.2 netmask 0xffffffff inet6…
Dr. Chocolate
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VPN tunnel IP is 172.16.4.2, how can I see what IP's/Subnets are on the other side?

This is the ifconfig: utun2: flags=8051 mtu 1340 options=6403 inet 172.16.4.2 --> 172.16.4.2 netmask 0xffffffff inet6…
Dr. Chocolate
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Binding to random IP from IPv6 subnet (/64) doesn't work

I got a scaleway.com server (DEV1-S) which offers me a /64 IPv6 subnet. I want to use an IP from this subnet to make a HTTP request (will use wget in the examples) but I can't get it to work. The request (with wget but also with other programs &…
003random
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How to configure VPC and subnet for EC2 Database accessible privately

I have an EC2 Postgres Database (not standard AWS RDS, but based on my own configured AMI) I have a load balancer, auto scaling group with 4 max servers in each AZ (us-west-2) My load balancer is attached with 4 public subnets (each in 1 AZ) My EC2…
Nirav Bhatt
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Single AD/DHCP/DNS Server - multiple subnets

I'm subnetting the small network of our business for management and security reasons. Prior to this I had: 172.16.1.0/24 And now I want this: 172.16.1.0/24 -> corporate LAN 172.17.0.0/24 -> management of servers 172.17.1.0/24 -> hosting - managed…
LeRouteur
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Do network acls block inter-subnet traffic as well?

I have VMs placed in different AZs on AWS. In order to be able to do this, you need a subnet in each AZ. If I'm creating a network acl for the entire setup (ie to be associated with all subnets) do I need to specify allow rules from all the subnet…
ndtreviv
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Issues with Ubuntu Network Setup

Please, someone tell me whats up here, I am going bonkers, I have used multiple calculators etc, everything tells me the details in the image are correct but ubuntu just will not accept.
Ron Appleton
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Multiple Subnets within ESXi host

I'm trying to create some subnets on an ESXi (version 6.7) host and have some VMs within these subnets with one or more that act as gateway between them. I'm trying to do this creating another VLAN on the same vSwitch but I can't find a solution…
Albyx97
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Connecting industrial devices to OPC server while keeping segregation

We have two industrial machines (let's call them Holding and Media) with configured network addresses 192.169.0.122 and 192.169.0.123 respectively. Currently they are isolated physically although logically in same subnet. There is no option to…
alexlev2004
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need help to understand tcpdump

Background: I have a web server hosted on 10.20.30.177:7000 and it should be accessible from 10.20.30.1 (m1) and 172.17.2.88 (m2). I am able to access from m1 and not from m2. I understand there can be 100 of reasons for this behavior and i am…
PKV
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Multiple subnets through VPN openvpn

I'm facing the following problem and after a huge amount of trial and errors i could use ask for some help. Situation: SiteA have LAN network: 192.168.101.0/24 while SiteB have LAN network 192.168.102.0/24. But on a Layer2 switch on SiteB there is…
MenInTheMiddle
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How do I set up multiple interfaces on Windows Server 2019?

I am working on setting up a small vm host cluster and I have the following setup : Windows server with multiple network interfaces Aruba 2930f switch Switch is connected to internet (gateway 192.168.0.1) I would like to configure multiple subnets…
CorinaLarksExtraMild
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Kuberenetes Node to Node Communication Not working as expected

Hello to All I do Have problem on My Kubernete Cluster Specification Cluster NAME STATUS ROLES AGE VERSION INTERNAL-IP EXTERNAL-IP OS-IMAGE KERNEL-VERSION CONTAINER-RUNTIME k8s-w02-prod Ready …
Rehan
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One IP address does not respond to ping

Ok so here's the situation: I have a DMZ subnet, x.x.x.x, and this IP address( x.x.x.63 | 255.255.255.0 | gateway x.x.x.1) fails every ping request by any other device in the network but still works and navigates. This is the network configuration:…
Cema Xeg
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