The difference between public and private IP and who is security

Learn the difference between public and private IP and who is the best

This is a topic of general interest, because we all have internet at home. If you use it to watch Netflix, YouTube, social media, and download music and movies, you’ll probably be happy with your current ISP. And by ISP I mean the “Internet Service Provider” or simply the company that provides you with Internet service.

However, if you have a Play Station at home, play online on your computer, have security cameras or plan to install them in the near future, you may not be completely satisfied with your current ISP. Usually, residential internet plans are not prepared to optimally handle some of these situations, and this is usually due to the fact that these plans have a private IP address, and have internet level restrictions, which is not the case with public IP which is usually delivered in internet plans of companies.

An IP address is a set of numbers that identifies a computer or device on a network. More precisely, it is the logical or “virtual” identifier of the network card of this computer. The public IP address is the computer’s identifier across the Internet. This means that it can be seen and on its website. In contrast, the private IP address is not visible on the Internet but only within a particular private network, and therefore it has Internet connection restrictions.

In the case of ISPs, they can provide Internet service to their subscribers by assigning them a public or private IP address. Currently the most normal case is the second case in order to reduce costs and due to the limitations of public IP addresses. In any case, whatever IP type, it will be associated with the subscriber’s router.

Since the public IP address can be seen or located on the Internet, it has a direct connection or free connection to any device or service over the Internet. Since there are no intermediaries involved, there are no issues with connecting to the Internet. This is not the case with private IP, which although it gives subscribers Internet access and will generally not have problems in normal use, there are instances when it will be a problem.

  • ports

This is where the issue of ports comes in. When two computers establish a connection, for example a subscriber router (or a device on your network that will communicate to or from outside through that router) and a server on the Internet, they do so through communication channels called ports. These ports must be open or free so that there are no connection problems. When an ISP assigns a private IP address to a subscriber, that IP address is assigned by a server that controls that connection and becomes a wall or barrier between the subscriber and the Internet. This is known as Strict NAT or CG NAT.

If the ports on the ISP server are blocked, there is a firewall or a free connection restriction, which is something that always happens, even if you open the ports on your router, you will have problems with the services, especially with regard to remote access. ISPs do this in order to protect outside attacks on their network and computers, as well as on their customers.

  • How do I know if I have a public IP address?

To find out if you have a public IP, you should check the IP address that appears in the WAN information on your ISP’s router or modem. Public IP addresses can contain from 1 to 191 in the first octet (except for IP addresses whose first numbers start at 10.0.0 and 172.16.0). Here are several examples of public IP addresses:

98.137.11.163

157.240.6.35

172.67.138.108

The first eight of all these IP addresses, 98, 157, and 172, fall within the indicated range, and are therefore public IP addresses.

  • How to get a public IP

The traditional thing is to order it from your ISP. Some can assign it to their residential or home internet plan for an additional monthly value.