check dns propagation status

From the 07 of the Estonian DDoS information war, to this year Guangxi Nanning 30 internet cafes suffered from DDoS ransomware, and then to the Sina network suffered a DDoS attack can not provide external services for more than 500 minutes. DDoS

Computer network Summary Note (I) this log will be summarized in the fourth edition of "Computer Network-top-down method and Internet features. Because the original book is in English, this summary may be very slow. Or enable the reserved bit first.

3 Outlook-- The mountains are high and the months are small.The greatest truths are no more than two, three, and four. However, in my opinion, only those who follow up the memory, stare at the registers, and get frustrated by inexplicable problems

Solaris system management commands and Related Technologies A Bytes ----------------------------------------------------------------------------------- Ab2admin-command line interface for AnswerBook2 Management Ab2cd-run the AnswerBook2 server from

(1) What is a "zombie" computer?The so-called "zombie" computer is simply a computer remotely controlled by others. When your computer is controlled by others, it is like the meat on the chopping board of others. what others want to eat is what they

# About Kong# # BackgroundWhen we provide API or microservices, we usually use openresty nginx for traffic forwarding or adding some rules or functions, but as the number of services and references increase, complex network environment,Making

The relationship between Iptables and NetFilter:NetFilter the code in the kernel space completes the analysis and disposition of the packet according to the Rules in table. However, the specific firewall rules in these table must be written

Overview iptables overview iptables basic iptables syntax iptables instance case description Firewall Overview firewall refers to a combination of components set between different networks or network security domains, it enhances the security of the

Firewall refers to a combination of components set between different networks or network security domains, which enhances the security of the internal network of the organization. It uses the access control mechanism to determine which internal

Summary and application of Linux iptablesFirst, firewall, Iptables introduction1, the firewall is used for the implementation of Linux access control functions, it is divided into hardware or software firewall two kinds. Regardless of the network in