All routers such as Cisco RV340 For example have a total of 65536 ports, ranging from 0 to 65535. The IANA, the entity that oversees the global allocation of IP addresses and other resources related to Internet protocols, has established a standard for port allocation. This means that there are three groups of ports, and the ports in each of these groups have a specific function. These are the three categories:
Ports from 0 to 1023: These are the well-known ports, the ones reserved for your computer’s operating system, and the most important protocols for its operation. For example, port 21 is for FTP, 25 is for SMTP, and port 80 is for HTTP.
Ports from 1024 to 49151: These are the registered ports used by the applications and games you install on the computer. They will generally be configured automatically during your installation processes.
Ports 49152 to 65535: These are the dynamic or private ports, which correspond to the applications that need to connect to a server. It is in this range that P2P download clients are found, for example.
Why Open The Ports Of Your Router
Although they are generally configured correctly, if some error during the installation has caused that the dynamic port that an application need has not been configured correctly, you will start to have problems when using it, and you will need to open its port so that its speed connection or operation are as provided.
This happens because when it is not configured correctly, your computer will not know which port or door it should open to the data, nor will it know which application it should deliver it to. This will cause connection problems, such as the classic one that downloads are too slow or too much lag in a game or app.
When you have to get down to work, go to the configuration of your router and manually open the ports required by the application or game that is crashing. And why are the ports closed for defects and not open, so you don’t have to? Well, for the same reason you don’t leave the doors of your house open: security.
Ports should open when in use but should remain closed when no longer in use. If you leave the ports open, attackers could take advantage of them to access your network or computer. Hence, it is essential to open only the ports you will use and close them when you stop using the application you need. If the ports are correctly configured, your computer usually manages them, but it can be a problem if you open them manually.