Network - Server

About

A network server is a service that listens on a socket for inbound connections.

This server receives packets and returns packets

Example

Web/HTTP server

A Web/HTTP Server listens for TCP connection on the HTTP/HTTPS port (80) and expects to receive in the body of the packet a HTTP request in a text format.

SMTP Server

A SMTP server listens for TCP connection on the submission port (25,487, 587) and expects to receive in the body of the packet a SMTP command, the EHLO command as first.

Create a server

NetClient

To create a simple server that will listen and write to the standard output, you can use NetClient such as:

• Netcat
• OpenSSL

Computer Language

With computer language, you can use a library that manages the wire for you. ie:

• presents you with the body (known as buffer), not the packet
• manage TLS/SSL (and handshake)

Example: https://netty.io/