how to answer this?

Question

Suppose you decide to open your own business in Kansas.  You wish to have a public web server that describes your business and products/services. Naturally, you would like the entire world to be able to visit your Web site in order to learn about your exciting products and services.  You have a computer system that you can use for a web server, but nothing else (no internet). Describe the general network focused steps you would you take to put your web server on the internet and make sure that someone in Italy named "Alice" can access your site?  Describe how the routers in Alice's network become aware of your new network.

Answer 1

A diagram will be submitted in video post later. That diagram has been broken up into functional components that would need to be configured as described in the following post. Please note several of these functions could/would be housed in a single device.

Assuming you wish to use the server you own you would need to acquire and configure the following

1) Contract with an ISP for Internet/DIA service (with 1 or more public IP addresses)

2) Acquire and Configure Network equipment.

a) Internet router to connect to ISP

b) External/DMZ firewall

- Permit appropriate traffic toward internal devices.

Use 1 Public IP for NAT.

- Permit WWW traffic to WEB Server.

You could use another Public IP to direct traffic toward the DMZ/Website

Or use a single IP with port forwarding (though this is better suited for home use)

c) DMZ Switch (May be ports on a common device)

d) Web Server

e) Internal firewall (May be a firewall rule on a common device)

- Permit appropriate traffic to internal devices

f) Internal Switch (May be ports on a common device)

3) Register the Public IP used to access the Web Server with a Domain Name Service Provider

4) Verify Access

Once your Web Server's IP address is registered with a Domain Name Service Provider any client. i.e. Alice in Italy can query the domain name and gain access to your website.

When Alice enters your website address in her browser her browser performs the following actions.

1) Does a DNS lookup with her service providers DNS server

The DNS server does a lookup of the name queried and returns the Public IP address registered with your Domain Name Service provider

2) Connects to your website using the returned Public IP address.

Assuming Alice is typical home user

a) Her router would forward traffic destined to your web servers address to her default gateway

b) Her service provider would then route the traffic using bgp/ISIS, etc, toward your ISP

1. Note there may be several providers in the path

c) Your ISP would use their routing protocols to direct traffic toward your subnet (Public IP's)

d) Your router would then forward traffic toward your web server

e) Your website would reply and the reverse path would be followed.