How to obtain public IP? Public IP application and usage skills sharing

In today's increasingly diverse digital office and personal network needs, scenarios such as remote access to home devices, building personal websites or private clouds are becoming more and more common, and the realization of these needs is often inseparable from the support of public IP. Many users are not familiar with the concept, acquisition methods and usage skills of public IP, and often encounter obstacles in operation. This article will systematically explain the relevant knowledge of public IP, from acquisition channels, application skills to use optimization, and provide users with practical guidance in an all-round way to help everyone smoothly realize various network needs.

What is the difference between public IP and intranet IP?

to obtain and use public IP smoothly, it is first necessary to clarify the core differences between public IP and intranet IP to avoid confusion between the functions and application scenarios of the two IPs.

1, address range and uniqueness

public IP is assigned uniformly by the Internet Assigned Numbers Authority and is unique worldwide. Any public IP can be directly accessed by other devices on the Internet. The intranet IP is the private address assigned by the router to the devices in the local area network. The common range is 192.168.x.x, 10.x.x, etc., which is only valid in the local area network. Different local area networks can use the same intranet IP.

2, access rights and application scenarios

public network IP support devices directly interact with the Internet, suitable for building external services, remote access and other needs; intranet IP can only communicate in the local area network, if you want to access the Internet through the NAT conversion function of the router, the intranet IP mapping can only be achieved after the public network IP, can not be directly accessed by external devices.

What are the channels for obtaining public IP?

clear the role of public IP, then understand the mainstream access channels of public IP, users can choose the appropriate way according to their own needs.

1, apply to the operator for a fixed public network IP

this is the main channel for individual users to obtain public IP, home broadband users can directly contact the local operator customer service to apply for changing the dynamic IP to fixed public IP. Some operators may charge a certain service fee, and some areas provide free services for home users, subject to the local operator policy. After the application is successful, the operator will bind the user's broadband line to the fixed public IP and restart the router to take effect.

2, buy Cloud as a Service to get public network IP

If users need to build external services, they can obtain public network IP by purchasing Cloud as a Service. Mainstream Cloud as a Service providers such as Alibaba Cloud and Tencent Cloud will automatically assign public network IP when users purchase Cloud as a Service. Some service providers also support the separate purchase and binding of elastic public network IP. Users can adjust the bandwidth and usage time of public network IP according to business needs, which is more flexible.

3 Replacing public networks with dynamic domain name resolution IP

cannot apply for a fixed public IP, users can use dynamic domain name resolution service to indirectly achieve public network access effect. This service can bind the dynamically changing public IP to the fixed domain name, even if the public IP changes, users can still access the target device through the domain name, which is suitable for individual users who do not require extremely high network stability.

What are the practical skills of public IP application?

many users encounter rejection when applying for public IP, master some practical application skills, can improve the success rate of public IP applications.

1, clear and reasonable application reasons

when applying for public IP to operators, it is necessary to provide reasonable and specific application reasons, such as teleworking access to home computers, building personal private cloud storage, etc., to avoid using vague expressions. Operators will review the application for public IP, and it is easier to pass the approval if there is a reasonable demand. In some areas, users may also be required to sign relevant agreements.

2, choose the appropriate application channel

apply for public IP, the operator's official customer service hotline or offline business hall is preferred. Compared with online self-service channels, manual communication can express the needs more clearly. If the first application is rejected, you can politely ask the reason for the rejection and try to supplement the relevant materials. Apply again. Some operators also support submitting public IP applications through the official APP, and users can choose according to their own situation.

4. What are the optimization skills for the use of public network IP?

successfully obtain the public IP, master some optimization skills, can improve the use of public IP experience and security.

1, open the public IP protection settings

public IP is directly exposed to the Internet and vulnerable to network attacks, it is necessary to turn on the firewall function of the router, close unnecessary ports, and regularly update the router firmware to fix security bugs. If you use the public IP of Cloud as a Service, you need to configure the security group rules and only open the necessary server level ports to avoid the risk of irrelevant port exposure.

2, optimize the network stability of public IP

if you obtain a dynamic public IP, you can open the DHCP fixed allocation function in the router to avoid changes in the IP of the internal network affecting the mapping effect. At the same time, regularly check the connectivity of the public IP. If there are frequent drop-offs or IP changes, you can contact the operator to check the line problem and ensure the network stability of the public IP.

In summary, the public IP is to achieve cross-network access, build the core foundation of external services, users need to clear the difference between public IP and intranet IP, and then through the operator application, Cloud as a Service purchase and other channels to obtain public IP, while mastering reasonable application skills and use optimization methods, not only to improve the success rate of public IP applications, but also to ensure the use of public IP security and stability, better meet the needs of various networks.