We describe the implementation of a custom Domain Name System (DNS) by using C socket programming for network communication, together with SQLite3 database for the storage of Internet Protocol (IP) for Uniform Resource Locator (URL). Then we provide a performance analysis of our implementation. Our code is available publicly [1].
Bangkok, in general, is a strange place to stay. Of course, it is warm there, rather cheap and some might find the cuisine interesting, along with the fact that about half of the world’s population does not need to apply for a visa in advance to get there. However, you still need to get acquainted with the smells, and the city streets are casting cyberpunk scenes more than anything else.
This post describes the steps needed for setting up automatic SSL certificates creation and renewal, using Let's Encrypt as the automated Certificate Authority, which provides a well-maintained API.
acme-dns-route53 is the tool to obtain SSL certificates from Let’s Encrypt using DNS-01 challenge with Route53 and Amazon Certificate Manager by AWS. acme-dns-route53 also has the built-in functionality for using this tool inside AWS Lambda, and this is what we are going to do.
