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Port Forwarding Guide – All The Answers To The Laymen Questions

Port Forwarding, also known as port mapping, is the application of Network Address Translation (NAT). NAT directs and redirects communication requests from one set of IP addresses and port number to another. It does this all while traveling through a network gateway, such as a router. With port forwarding, you can connect an internal network to an external network by remapping the destination IP address and port number to an internal host. Our port forwarding guide explains all the important bits you need to know.

On a standard TCP/IP network, data is transmitted via different means. However, data is always broken down into different packets to simplify its transportation. Each packet has relevant information about where it is eventually headed and they travel between network devices via routers that send and determine routes of all packets. It doesn’t matter if it’s an Asus router, a Comcast one, Netgear or a TP-Link one, they all access the packet information to determine these destinations and routes.

What It Does

Port forwarding intercepts these packets while they’re in transit. A router collects the packets and notes that the communication request is being directed to a specific port on the device. At this point, it evaluates whether there are any rules in place to redirect the traffic to an assigned device. If a port forwarding rule is defined, then the packet will be sent to that device. If not, then it will be collected by the device that receives all the packets as visible on the public internet. 

For example, when you try to access a remote security camera that is not on the cloud and is only accessible via a specific port on your local network. If you’ve enabled port forwarding on the network the camera is connected to, you can easily access the camera’s footage whenever you want. Such as 123.45.67.89:2921, where 2921 references the port number. Otherwise, you’ll only be able to access the port from the local network (e.g. 192.168.1.1:2921).

Types of Port Forwarding

The three most common kind of port forwarding techniques include:

Local Port Forwarding: This is the most common form of port forwarding. It is used to send data from one client app to another within one system. This is extremely helpful in sidestepping local firewalls and accessing certain blocked web pages, for example.

Remote Port Forwarding: This is mostly used for server-side applications on SSH to access data and devices on the client-side. For instance, if a company’s employee has a File Transfer Protocol (FTP) server at their home and wants to give other employees access to it. They can set up port forwarding on the company’s internal computers using the FTP server’s address and port numbers.

Dynamic Port Forwarding: This is most commonly used to bypass NAT by creating a tunnel for secure connections. For example, if you’re sitting at a coffee shop, you can use Dynamic Port Forwarding as a way to protect your data. You can also use it to bypass firewalls that restrict your access to external sites, such as on corporate networks.

Why Port Forwarding?

You’ll find port forwarding to be extremely useful in addition to being safe. It is an excellent way to protect servers and clients from unwanted access. Moreover, it “hides” servers available on a network, and limit access to or from a network. It is entirely transparent for the end-user while adding a potent layer of security to networks. 

In other words, it is tremendously helpful in keeping unwanted traffic off networks. This way you only get traffic from the ports you open and not from all 65,535 ports available. Here at Port Forwarding Hub, we aim to cover an intensive list of games, routers, and software whose performance can be enhanced thanks to port forwarding. You’ll find a detailed port forwarding guide on every major subject. This includes why you should choose port forwarding, setting it up on all the popular routers for as many games as possible, and how safe it is. Think of Port Forwarding Hub as your one-stop destination for all your queries related to port forwarding. We’ve got you covered. If we’re missing something you need, hit us up here.

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