Questions tagged [cidr]
Classless Inter-Domain Routing (CIDR) is a collection of IP standards designed to optimize the process of allocating IP addresses by forming unique identifiers.
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Was there supernetting before CIDR or were subnets restricted to their classes
Subnets before CIDR (introduced in 1993) sub-divided classful networks using subnets of class A, B and C.
With CIDR we can have arbitrary prefixes. For example, 192.0.0.0/7.
Could we have done that ...
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What does a CIDR mask mean in the context of "ip address add"?
I'm attempting to learn to set up Wireguard properly (not just by copy-pasting). I've come across this line on the quickstart page:
ip address add dev wg0 192.168.2.1/24
Reading the man page for ip, ...
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Adding more IP Addresses to a Subnet in AWS
I have a Subnet with CIDR 10.0.4.0/28 (15 IP addresses), which is now exhausted; so I want to add more IP addresses.
Is it possible to add more IP addresses to the subnet? I see that I can add a ...
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AWS CIDR Address is not within CIDR Address from VPC
In AWS have created VPC which CIDR is 10.0.0.24.I want to creates its two subnet.its public-subnet is in us-west-1a - IPv4 CIDR 10.0.0.0/24 thenwhen I create private subnet is in us-west-1b - ...
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How to update podCIDR for Kubernetes master node without recreating it
I have installed a Kuberntes system with one node,the node itself worked as both work node and master node,now I met a problem:
When the pod num exceed 255,Kubernetes will failed to deplopy it,after ...
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Check if IP Belongs to a CIDR
We have a list of CIDR's
1.10.10.0/24
5.154.0.0/16
5.181.219.0/24
23.90.68.0/24
31.40.214.0/24
I want to check if a IP for example : 23.90.68.56 belongs to any of the above CIDR's. If yes then we get ...
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AWS VPC Subnetting
I have a VPC created with a CIDR block of 10.10.0.0/16. I am trying to subnet that block into some /24's -- ie. 10.10.1.0/24
It wont let me. The error I get is:
CIDR Address overlaps with existing ...
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How do I route all public traffic through Wireguard but not local traffic?
I know there's a series of CIDRs that I can use to cover all public CIDRs and leave out local CIDRs, but I cannot find this anywhere and I don't recall where I found it a couple of years ago when ...
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Resource handler returned message: "The CIDR '10.0.1.0/22' is invalid
I'm getting this error while trying to create a VPC with a Subnet in CloudFormation.
Subnet CREATE_FAILED Resource handler returned message: "The CIDR '10.0.1.0/22' is invalid. (Service: Ec2, ...
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What does 0.0.0.0/0 mean?
For example in an 'allow' statement in BIND or in Chrony config files.
Does allow 0.0.0.0/0 mean allowing any clients or allowing no clients?
My question isn't about the specific programs, but just ...
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"AWS CIDR is not within the CIDR ranges of VPC", but it is?
many questions on this, but this time doesn't seem as obvious as the others.
I'm trying to split a VPC in two subnets.
I start with VPC 10.0.0.0/24, 254+1 IPs, from 10.0.0.1 to 10.0.0.255
I create the ...
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Is it possible to communicate between different CIDRs?
For example, there are two CIDRs in the same VPC on AWS. One of them is public and one is private. They are in the different segment.
# Public Subnet CIDR
10.124.42.0/27
# Private Subnet CIDR
10.124....
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Can fail2ban-client tell me if an ip from a CIDR range is in a jail? [duplicate]
If I have a CIDR like 13.54.63.128/26 can fail2ban-client tell me if there's an IP in this range that's currently banned?
Currently I'm doing:
CIDR="13.54.63.128/26"
nmap -sL -n $CIDR | awk '...
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Identifying subnet bits of network addresses with same CIDR [closed]
Say we have network addresses 10.10.10.252/30 and 10.10.255.252/30 and 10.255.255.252/30. They all have CIDR of 30.
I realize all three subnets have two usable hosts.
All three addresses have subnet ...
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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.
