What is IP blocking

IP blocking means that the firewall maintains an IP blacklist. Once a request packet sent to an address in the blacklist is found, it will be discarded directly. This will result in the source host not receiving a timely response from the target host. A timeout is triggered to achieve the purpose of blocking access to the target host.

#The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

What is IP blocking?

IP blocking means that the firewall maintains an IP blacklist. Once a request packet sent to an address in the blacklist is found, it will be blocked directly. Discarding it will cause the source host to not receive a timely response from the target host and cause a timeout, thus achieving the purpose of blocking access to the target host.

Definition

IP blocking is a form of Internet censorship. IP blocking means that the firewall maintains an IP blacklist. Once a request packet sent to an address in the blacklist is found, it will be discarded directly. This will cause the source host to not receive a timely response from the target host and cause a timeout, thus achieving The purpose of blocking access to the target host.

The server that provides the service may also use a similar method to control the scope of access. Usually, a whitelist can be set to only allow IP access from a certain network segment or a certain country. You can also set Blacklist to prohibit IP access from a certain network segment or certain countries. For example, some online game operators or online video services only allow domestic IP connections to ensure the rights and copyright restrictions of domestic players.

Disadvantages

This kind of filtering mechanism that uses a blacklist for banned websites instead of a whitelist for websites that are allowed to access will inevitably slip through the net. The presence.

Common Situations

Block IP - When a computer or system is attacked by an external party, the administrator can resist the attack by blocking the attack source IP address. Through firewall and router configuration, you can block an IP and prohibit connections to it, thereby resisting attacks. But in fact, for most attacks, administrators don't have time to react at all, and the system usually crashes after reacting.

1. Publish abusive and insulting remarks many times;

2. Publish a large number of commercial advertisements or useless posts (i.e. "explode")

3. Other serious Violation of Tieba regulations.

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