how to block certain ip addresses

In many cases, you may need to block IP addresses under Linux. For example, as an end user, you may want to be immune from spyware or IP tracking. Or when you're running the peer software. You may want to filter the Internet links for anti-peer

Network Layer 2 (IPv4 and IPv6 addresses and related protocols) IP (internet protocol) protocol is the core protocol of the TCP/IP protocol family and the network layer of the internet. The current version number is 4, also known as IPv4. The next

I. IntroductionIf the "Millennium Bug" problem is a major hidden danger in the development of computer technology, the problem of IPv4 address insufficiency is a "stumbling block" in the Development of China's IP technology ". The difference is that

Basic skills for IP address planning in Enterprises: With the development of networks in enterprises over the years, more and more enterprises have established internal LAN, to achieve efficient and low-cost operations and management such as

Five, IP address planning method(1) Basic steps for IP address planningNetwork address planning needs to be done in the following 6 steps:a) Determine the user's demand for the number of networks and hosts;b) Calculate the basic network address

The IP address is like a phone number, but the area code is required for dialing a phone number from another country. The subnet mask is required for accessing other network segments in the network. The IP address must be classified as if the IP

IP Sub-network Divisionn IP address and subnet maskThe IP address is made up of 32-bit binary numbers, which are generally expressed in dotted decimal notation.1. Classification of IP addressesThe IP address consists of two parts: the network

Common IP nat command syntax: ip nat {inside | outside} no ip nat {inside | outside} this command is used to set the Intranet and Internet interfaces of NAT. Use the no option to stop the interface from applying NAT. Parameter: inside: indicates

Analysis of TCP/IP packet based on JPCAPOriginal: Zhao HuiDirectoryChapter One structure of Ethernet and TCP/IP1.1 Structure of the Ethernet1.1.1 Ethernet based on network architectureData exchange of 1.1.2 Ethernet1.1.3 Structure of Ethernet frames1

Cisco router ip nat command ip natip nat inside destination ip nat inside source list ip nat inside source static ip nat outside source list ip nat outside source static ip nat pool ip nat translation ip nat Syntax: ip nat {inside | outside} no ip