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Overview This article discusses how to query the TCP/IP protocol stack of a host to collect valuable information. FirstFirst, I enumerated several "classic" operating system identification methods outside the stack fingerprint. And thenI described

The internet is undoubtedly the greatest design in human history, connected with hundreds of millions of of computers and communication devices around the world, even when users on both ends of the globe can communicate in a single instant.It can be

The internet is undoubtedly the greatest design in human history, connected with hundreds of millions of of computers and communication devices around the world, even when users on both ends of the globe can communicate in a single instant.It can be

Document directory HTTP (Hypertext Transfer Protocol) FTP (file transfer protocol ): Email Service DNS (Domain Name System) TCP three-way handshake TCP broke up four times The application layer protocol defines how application processes in

Document directory TCP Packets UDP Packets UDP name server responses Tcpdump: Dump traffic on a network is used to intercept data packets on the network. Different data packets can be intercepted based on specified network interfaces. It will

The English original intention is the dump traffic on a network, namely intercepts the network the datagram, may intercept the different datagram according to the specified network interface . It outputs a description of the content of the report

Port Scan path:What is a scanner?A scanner automatically detects remote or local host security vulnerabilities.ProgramBy using a scanner, you can discover the distribution of various TCP ports on the remote server and the services provided and their

Recently, there has been a kind of voice, that is, "learning needs to be fragmented". The main consideration is that the pace of work and life is accelerating, and it is difficult to have a long period of time for special study. For this reason,

The following describes the usage of the tcpdump command in Linux. For more information, see dumptrafficonanetwork, different data packets can be intercepted based on the specified network interface. It will output the description of the report

I,DNS System 1. DNS authorization: The Network Information Center Nic is responsible for allocating the top polar domain and assigning authorization institutions to other designated regions. An independently managed DNS subtree is called a region.