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SYN Flooding
A SYN flood is a form of denial-of-service attack in which an attacker rapidly initiates a connection to a server without finalizing the connection. The server has to spend resources waiting for half-opened connections, which can consume enough resources to make the system unresponsive to legitimate traffic. The Packet (information technology), packet that the attacker sends is the SYN (TCP), SYN packet, a part of Transmission Control Protocol, TCP's three-way handshake used to establish a connection. Technical details When a client attempts to start a Transmission Control Protocol, TCP connection to a server, the client (computing), client and Server (computing), server exchange a series of messages which normally runs like this: #The client requests a connection by sending a SYN (''synchronize'') message to the server. #The server ''acknowledges'' this request by sending SYN-ACK back to the client. #The client responds with an ACK, and the connection is established. This is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tcp Normal
TCP may refer to: Science and technology * Transformer coupled plasma * Tool Center Point, see Robot end effector Computing * Transmission Control Protocol, a fundamental Internet standard * Telephony control protocol, a Bluetooth communication standard Medicine * TCP (antiseptic) * Tenocyclidine, an anesthetic drug * Toxin-coregulated pilus, a protein that allows ''Vibrio cholerae'' to adhere to enterocytes * Transcutaneous pacing Chemistry * 1,2,3-Trichloropropane, an industrial solvent * Thermal conversion process, a depolymerization process for producing crude oil from waste * Tocopherols, a class of methylated phenols * Tricalcium phosphate, an anticaking agent * Trichlorophenol, any organochloride of phenol that contains three covalently bonded chlorine atoms * Tricresyl phosphate, an organophosphate compound Organizations * Taiwan Communist Party, a political party in Taiwan * Text Creation Partnership, an archival digitization effort at the University of Michigan, US * T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IP Address
An Internet Protocol address (IP address) is a numerical label such as that is connected to a computer network that uses the Internet Protocol for communication.. Updated by . An IP address serves two main functions: network interface identification and location addressing. Internet Protocol version 4 (IPv4) defines an IP address as a 32-bit number. However, because of the growth of the Internet and the depletion of available IPv4 addresses, a new version of IP (IPv6), using 128 bits for the IP address, was standardized in 1998. IPv6 deployment has been ongoing since the mid-2000s. IP addresses are written and displayed in human-readable notations, such as in IPv4, and in IPv6. The size of the routing prefix of the address is designated in CIDR notation by suffixing the address with the number of significant bits, e.g., , which is equivalent to the historically used subnet mask . The IP address space is managed globally by the Internet Assigned Numbers Authority (IA ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Smurf Attack
A Smurf attack is a distributed denial-of-service attack in which large numbers of Internet Control Message Protocol (ICMP) packets with the intended victim's spoofed source IP are broadcast to a computer network using an IP broadcast address. Most devices on a network will, by default, respond to this by sending a reply to the source IP address. If the number of machines on the network that receive and respond to these packets is very large, the victim's computer will be flooded with traffic. This can slow down the victim's computer to the point where it becomes impossible to work on. History The original Smurf was written by Dan Moschuk (alias TFreak) in 1997 . In the late 1990s, many IP networks would participate in Smurf attacks if prompted (that is, they would respond to ICMP requests sent to broadcast addresses). The name comes from the idea of very small, but numerous attackers overwhelming a much larger opponent (see Smurfs). Today, administrators can make a network imm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ping Flood
A ping flood is a simple denial-of-service attack where the attacker overwhelms the victim with ICMP "echo request" (ping) packets. This is most effective by using the flood option of ping which sends ICMP packets as fast as possible without waiting for replies. Most implementations of ping require the user to be privileged in order to specify the flood option. It is most successful if the attacker has more bandwidth than the victim (for instance an attacker with a DSL line and the victim on a dial-up modem). The attacker hopes that the victim will respond with ICMP "echo reply" packets, thus consuming both outgoing bandwidth as well as incoming bandwidth. If the target system is slow enough, it is possible to consume enough of its CPU cycles for a user to notice a significant slowdown. A flood ping can also be used as a diagnostic for network packet loss and throughput issues. See also *INVITE of Death *Ping of death *Smurf attack A Smurf attack is a distributed denial-of-se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Internet Control Message Protocol
The Internet Control Message Protocol (ICMP) is a supporting protocol in the Internet protocol suite. It is used by network devices, including routers, to send error messages and operational information indicating success or failure when communicating with another IP address, for example, an error is indicated when a requested service is not available or that a host or router could not be reached. ICMP differs from transport protocols such as TCP and UDP in that it is not typically used to exchange data between systems, nor is it regularly employed by end-user network applications (with the exception of some diagnostic tools like ping and traceroute). ICMP for IPv4 is defined in RFC 792. A separate ICMPv6, defined by RFC 4443, is used with IPv6. Technical details ICMP is part of the Internet protocol suite as defined in RFC 792. ICMP messages are typically used for diagnostic or control purposes or generated in response to errors in IP operations (as specified in RFC 1122 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fraggle Attack
A Smurf attack is a distributed denial-of-service attack in which large numbers of Internet Control Message Protocol (ICMP) packets with the intended victim's spoofed source IP are broadcast to a computer network using an IP broadcast address. Most devices on a network will, by default, respond to this by sending a reply to the source IP address. If the number of machines on the network that receive and respond to these packets is very large, the victim's computer will be flooded with traffic. This can slow down the victim's computer to the point where it becomes impossible to work on. History The original Smurf was written by Dan Moschuk (alias TFreak) in 1997 . In the late 1990s, many IP networks would participate in Smurf attacks if prompted (that is, they would respond to ICMP requests sent to broadcast addresses). The name comes from the idea of very small, but numerous attackers overwhelming a much larger opponent (see Smurfs). Today, administrators can make a network immu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SYN Cookies
Syn or SYN may refer to: In arts and entertainment In music *The Syn, a band *Synyster Gates, lead guitarist of the band Avenged Sevenfold Fictional characters *Doctor Syn, in novels by Russell Thorndike Other uses in arts and entertainment *SYN Media, a youth media organization based in Melbourne, Australia In science and technology * Syn addition, in organic chemistry *Syn conformation in alkane stereochemistry *Synonym (taxonomy), a system of accepted alternative names for species *SYN (TCP), synchronise packet in transmission control protocol (TCP) * Synchronous idle ( ␖), one of the C0 and C1 control codes *SYN (OSC), a standardized namespace within Open Sound Control Other uses *Syn (goddess) In Norse mythology, Syn (Old Norse: , "refusal"Orchard (1997:157).) is a goddess associated with defensive refusal. Syn is attested in the ''Prose Edda'', written in the 13th century by Snorri Sturluson; and in kennings employed in skaldic poetry. ..., in Norse mythology * Coalit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
TCP Half-open
TCP may refer to: Science and technology * Transformer coupled plasma * Tool Center Point, see Robot end effector Computing * Transmission Control Protocol, a fundamental Internet standard * Telephony control protocol, a Bluetooth communication standard Medicine * TCP (antiseptic) * Tenocyclidine, an anesthetic drug * Toxin-coregulated pilus, a protein that allows ''Vibrio cholerae'' to adhere to enterocytes * Transcutaneous pacing Chemistry * 1,2,3-Trichloropropane, an industrial solvent * Thermal conversion process, a depolymerization process for producing crude oil from waste * Tocopherols, a class of methylated phenols * Tricalcium phosphate, an anticaking agent * Trichlorophenol, any organochloride of phenol that contains three covalently bonded chlorine atoms * Tricresyl phosphate, an organophosphate compound Organizations * Taiwan Communist Party, a political party in Taiwan * Text Creation Partnership, an archival digitization effort at the University of Michigan, US * T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Half-open Connection
{{disambiguation ...
Half-open may refer to: * Half-open file in chess * Half-open vowel, a class of vowel sound Computing and mathematics * Half-open interval, an interval containing only one of its endpoints * Half-open line segment, a line segment containing only one of its endpoints * TCP half-open, a TCP connection out of synchronization See also * Half-closed * Clopen In topology, a clopen set (a portmanteau of closed-open set) in a topological space is a set which is both open set, open and closed set, closed. That this is possible may seem counter-intuitive, as the common meanings of and are antonyms, but ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IP Address Spoofing
In computer networking, IP address spoofing or IP spoofing is the creation of Internet Protocol (IP) packets with a false source IP address, for the purpose of impersonating another computing system. Background The basic protocol for sending data over the Internet network and many other computer networks is the Internet Protocol (IP). The protocol specifies that each IP packet must have a header which contains (among other things) the IP address of the sender of the packet. The source IP address is normally the address that the packet was sent from, but the sender's address in the header can be altered, so that to the recipient it appears that the packet came from another source. The protocol requires the receiving computer to send back a response to the source IP address therefore spoofing is mainly used when the sender can anticipate the network response or does not care about the response. The source IP address provides only limited information about the sender. It may p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tcp Synflood
TCP may refer to: Science and technology * Transformer coupled plasma * Tool Center Point, see Robot end effector Computing * Transmission Control Protocol, a fundamental Internet standard * Telephony control protocol, a Bluetooth communication standard Medicine * TCP (antiseptic) * Tenocyclidine, an anesthetic drug * Toxin-coregulated pilus, a protein that allows ''Vibrio cholerae'' to adhere to enterocytes * Transcutaneous pacing Chemistry * 1,2,3-Trichloropropane, an industrial solvent * Thermal conversion process, a depolymerization process for producing crude oil from waste * Tocopherols, a class of methylated phenols * Tricalcium phosphate, an anticaking agent * Trichlorophenol, any organochloride of phenol that contains three covalently bonded chlorine atoms * Tricresyl phosphate, an organophosphate compound Organizations * Taiwan Communist Party, a political party in Taiwan * Text Creation Partnership, an archival digitization effort at the University of Michigan, US * T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Server (computing)
In computing, a server is a piece of computer hardware or software (computer program) that provides functionality for other programs or devices, called " clients". This architecture is called the client–server model. Servers can provide various functionalities, often called "services", such as sharing data or resources among multiple clients, or performing computation for a client. A single server can serve multiple clients, and a single client can use multiple servers. A client process may run on the same device or may connect over a network to a server on a different device. Typical servers are database servers, file servers, mail servers, print servers, web servers, game servers, and application servers. Client–server systems are usually most frequently implemented by (and often identified with) the request–response model: a client sends a request to the server, which performs some action and sends a response back to the client, typically with a result or acknowledg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
