In one of earlier posts on DNS, we looked at the basic functionality provided by the DNS service and some of the important concepts related to the DNS protocol. AWS Route 53 is a distributed managed service that provides both the public and private DNS lookup service with a very high availability and scalability. It makes it … Continue reading AWS DNS Service – Route 53
Category: Networking
AWS Elastic Load Balancer
A load balancer is a device that acts as a reverse proxy and distributes the application traffic across multiple servers. This results in increased capacity and greater reliability of the applications running behind the load balancer. Generally load balancers are grouped into 2 types Layer 4 load balancer - Acts on the data available in network … Continue reading AWS Elastic Load Balancer
Domain Name System – An Overview
Domain Name System (DNS) is a networking protocol that converts the human friendly domain name to an IP address. IP addresses (IPv4 or IPv6) uniquely identify the devices connected to the internet and helps in routing the network packets from the source to destination. DNS server can be thought as a directory that maintains the list of … Continue reading Domain Name System – An Overview
AWS VPC Network Security
One of my earlier post on AWS Virtual Private Cloud described the basics of VPC including some of the security features it offers to control which packets move in and out of the VPC. In this article let's look at the VPC network security in further detail. Following diagram shows an example of how the security groups and … Continue reading AWS VPC Network Security
AWS VPC – NAT Instances and NAT Gateway
NAT Overview Network Address Transaction (NAT) is a technique of assigning a public IP address to a host or a group of hosts within a private network such that all egress network packets have the same public source IP address. NAT helps in limiting the number of public IP addresses required for a private network to … Continue reading AWS VPC – NAT Instances and NAT Gateway
AWS Virtual Private Cloud
AWS Virtual Private Cloud (VPC) is a web service that allows provisioning of a logically isolated infrastructure in the public cloud with its own IP address range, subnets, internet gateway, ACLs and route table configuration. It can be thought of as an isolated data center in AWS. VPC does all the heavy lifting and makes it … Continue reading AWS Virtual Private Cloud
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