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Questions tagged [subnet]

A part of the IP address identifying the whole local network (high bits as defined by netmask). The remainder of the IP address (host id) identifies devices that are connected to this network. Can also mean the local network itself, if addressed by IP address in a described way.

Read more on wikipedia: https://en.wikipedia.org/wiki/Subnetwork

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How do I allow SSH access to a range of IP's in AWS ec2 Security groups

I want to allow access from 181.49.80.0 to 181.49.100.255 But amn't usre how to do this using CDIR notation. (without explicitly allowing 181.49.80.0/24, 181.49.81.0/24 etc...) Many thanks, Danny.
Danny Browne
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What happen to TCP connection when user changes network

User 1 is connected to a TCP/IP server(in different subnet) from a wireless access point A. what will happen to TCP/IP connection when User 1 will move to another wireless access point B in same network. What will happen to TCP/IP connection when…
NecessaryDevil
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Attempting to setup static IP block with ATT Uverse and IP Passthrough to ASUS router

I am trying to accomplish the following setup: NVG599 <> ASUS RT-AC88U <> Static device I have an Ubuntu Server running Apache which has been configured to use an internal address 192.x.x.x as well as one of the static IP addresses. I know…
Martin
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Clarifying 1-to-many Subnet/VLAN Configurations

I'm exploring alternate multiplicities between IP subnets and VLANs, outside the recommended 1-to-1 implementation. My understanding is as follows: Multiple subnets to a single VLAN (connected via a switch): Hosts across both subnets would receive…
powrHouse
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Can it be a wrong given CIDR?

Am given some homework about creating 4 sub-nets out of a network address of 198.77.48.0/23. Clearly this is a class C address but can it even be possible to have a CIDR /23? We took it otherwise and thought our tutor might have errored. That in…
Hakim Marley
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what is benefit of CIDR?

What is the basic usage of CIDR in networking and also give me the benefit over SubNetting.
JavaUser
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how can I connect to an ec2 instance which is running on a private subnet?

how can I connect to an EC 2 instance running in a private subnet using putty. I don't understand what it needs to get connected as I am new to it
user3501639
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Subnet Mask /23 till second octect 255.255.254.0

I am currently getting subnet Mask /23 till second octect 255.255.254.0. My ip address is 10.11.17.111, and broadcast ip is 10.11.17.254. So while pinging the server, is it correct, if we are pining on 10.11.16.255. Since it is not broadcast ip.
Ankit Thakur
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AWS VPC Subnetting Methodology

I am an AWS Architect. I recently walked into an account that had some major design flaws with apps currently getting currently integrated onto the system. In my opinion, the subnets were just way too large, with a one size fits all mentality that…
Anthony Esper
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How to find out a http request is sent by a local network computer or by an internet client?

I need a structure which check if a request is sent by a local network computer or is sent by a remote client via internet. Is it possible to get this using httprequest object or ip address? IF client is a local network computer DO 1 IF Client is…
Babak Behzadi
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Number of IP-addresses in practice when paired with subnet masks: Should IP-addresses paired with different subnet masks be seen as distinct?

Number of IP-addresses in practice when paired with subnet masks: Should IP-addresses paired with different subnet masks be seen as distinct? I know an IP-address is represented as 4 octets, i.e. using 32-bits. The total is 2^32 different…
Shuzheng
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Debian netinstall with ip and gateway from different subnets on XenServer

How to setup Debian netinstall with ip and gateway from different subnets on XenServer?
Just do It
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Is subtracting 2 from subnet ID necessary?

The address of a class B host is to be split into subnets with a 6-bit subnet number. What is the maximum number of subnets and the maximum number of hosts in each subnet? 62 subnets and 262142 hosts. 64 subnets and 262142 hosts 62 subnets and 1022…
user4791206
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IP Address range with subnetmask

I'm quite new to how subnetmask is calculated. We have a requirement to whitelist the range of IP addresses on our asp.net website. 199.83.128.1 - 199.83.135.254 198.143.32.1 - 198.143.63.254 149.126.72.1 - 149.126.79.254 103.28.248.1 -…
Nil Pun
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Get all Ipv6 Addresses from CIDR prefix?

I found many information how to get all addresses from ipv4 cidr subnet, but nothing helpful for ipv6. Have php any libaries to calculate that? What i need is an array of all addresses from a ipv6 cidr subnet. For example all addresses from this…
mk2015
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