How can I use the CIDR block for managing IP address allocation?
I am currently engaged in a particular task that is related to configuring networking for a new data center that would host various services and devices. Try to explain to me how can I use the CIDR block to manage IP address allocation effectively and ensure proper routing within the network.
In the context of AWS, you can manage the IP address allocation and ensure proper routing within a network by using the CIDR block.
What is CIDR Block
CIDR is a tool that is used in the allocation and routing of the IP address. It helps allow the network administrator to allocate the IP address flexibly and effectively by specifying a network address and a subnet Mask.
Here are the steps given for how you can achieve your goal:-
Define subnets
# Define a CIDR block for a subnet
Subnet_cidr = “192.168.10.0/24”
Routing Configuration
# Add a route for a CIDR block via a specific gateway
Ip route add 192.168.20.0/24 via 192.168.10.1
Firewall rules
# Allow incoming traffic from a CIDR block on specific ports
Iptables -A INPUT -s 10.0.0.0/16 -p tcp –dport 80 -j ACCEPT
IP Address allocation