Before you get down to setting up a server, its better to test the upload speeds of your internet connection because the speed at which your visitors will be able to download from your server will depend upon the speed at which you will be able to upload. DSLreport is a good site to test the connection speed. If your upload speed is anything greater than or equal to 256 Kbps (or 32 KBps) it will do. If the speed is lower than that, don't worry, it will work too. But it will take longer time for the page to open. And if you have more than one visitor at the same time it could take even longer.
Tip: You should try to keep the size of your pages as small as possible to enable faster page loading. For this, upload all images on your website to an external server, i.e. any image sharing site.
Now lets get to the actual procedure. First download Abyss Webserver and install it. When you run the application it will start listening at port 80 which is the default port for all HTTP connection. Before you can start configuring the server, you have to create an Admin account for yourself. After you've created an account, login and you will be presented with this page.
Clicking on Configure (Hosts) will take you to this
As you can see there are tons of settings available. Each one of these options will take you to more settings for you to find tune your server. I will leave that for you to explore.
After you have installed and run the webserver, open your browser and type http://127.0.0.1. If you get the Abyss's default page you know that your server is up and running succesfully. Now all you have to do is replace the index.html file under \Abyss Web Server\htdocs\ with your own files.
Your website will now require a hostname so that others can access it. Since your home net connection is probably on a dynamic IP we will use a service which is known as dynamic DNS. No-IP is one which gives this service for free. Go to this site and register a hostname for yourself. Then download their client software. This software will monitor your IP address and immediately update their DNS server whenever your IP changes. So no matter how many times your IP address changes throughout the day, the DNS servers will always map your domain name with the current IP address.
We are almost done. If your DSL router is configured in the Pure Bridged mode than there is nothing else to be done. But if your router is not configured in the bridged mode and doesn't allow any service from the Internet to access your PC, you need to setup port forwarding. When you setup port forwarding the router will transfer all requests to your PC from the Internet to the port number you assign.
To setup port forwarding type http://192.168.1.1 (or http://192.168.0.1) in your browser to take you to the router's login page. Enter the username and password (usually both "admin" by default). Different routers have placed the port forwarding settings at different places. You will find it either under the NAT, or Virtual Server or simply Port Forwarding. In the port forward settings, do these.
# Enter the static IP address of your PC i.e. the Ethernet card's IP in the Private IP field.
# Set both Public and Private port as 80.
# Set Protocol as TCP and click Save.
If you have difficulties port forwarding than there are a lot of resources on Internet that will guide you through the process.
That's it!! Now you can test your site from another PC not sharing your internet connection. If everything is working right you should be able to open your site. You can also test whether your port 80 is visible from the outside world, which is essential in order to access your site, by going to http://canyouseeme.org and entering the required port number. Don't forget to open the port 80 in your Windows firewall, if its running.
Caution: Running a web server on your PC is risky because it opens up your PC to everybody on the Internet. Be sure to have an updated Anti Virus, a firewall and an up to date Windows.