|
Packet Crafting
Packet crafting is a technique that allows network administrators to probe firewall rule-sets and find entry points into a targeted system or network. This is done by manually generating packets to test network devices and behaviour, instead of using existing network traffic. Testing may target the firewall, IDS, TCP/IP stack, router or any other component of the network. Packets are usually created by using a packet generator or packet analyzer which allows for specific options and flags to be set on the created packets. The act of packet crafting can be broken into four stages: Packet Assembly, Packet Editing, Packet Play and Packet Decoding. Tools exist for each of the stages - some tools are focused only on one stage while others such aOstinatotry to encompass all stages. Packet assembly Packet Assembly is the creation of the packets to be sent. Some popular programs used for packet assembly are Hping, NemesisOstinato [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Network Administrator
A network administrator is a person designated in an organization whose responsibility includes maintaining computer infrastructures with emphasis on local area networks (LANs) up to wide area networks (WANs). Responsibilities may vary between organizations, but installing new Computer hardware, hardware, on-site servers, enforcing licensing agreements, software-network interactions as well as network integrity and resilience are some of the key areas of focus. Duties The role of the network administrator can vary significantly depending on an organization's size, location, and socioeconomic considerations. Some organizations work on a user-to-technical support ratio, Network administrators are often involved in proactive work. This type of work will often include: * network monitoring. * penetration test, testing the network for weakness. * keeping an eye out for needed updates. * installing and implementing security programs. * in many cases, E-mail and Internet filters. * eva ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Communications Protocol
A communication protocol is a system of rules that allows two or more entities of a communications system to transmit information via any kind of variation of a physical quantity. The protocol defines the rules, syntax, semantics and synchronization of communication and possible error recovery methods. Protocols may be implemented by hardware, software, or a combination of both. Communicating systems use well-defined formats for exchanging various messages. Each message has an exact meaning intended to elicit a response from a range of possible responses pre-determined for that particular situation. The specified behavior is typically independent of how it is to be implemented. Communication protocols have to be agreed upon by the parties involved. To reach an agreement, a protocol may be developed into a technical standard. A programming language describes the same for computations, so there is a close analogy between protocols and programming languages: ''protocols ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Packet Sender
is an open source utility to allow sending and receiving TCP and UDP packets. It also supports TCP connections using SSL, intense traffic generation, HTTP(S) GET/POST requests, and panel generation. It is available for Windows, Mac, and Linux. It is licensed GNU General Public License v2 and is free software. Packet Sender's web site says "''It's designed to be very easy to use while still providing enough features for power users to do what they need.''". Uses Typical applications of Packet Sender include: * Troubleshooting network devices that use network servers (send a packet and then analyze the response) * Troubleshooting network devices that use network clients (devices that "phone home" via UDP, TCP, or SSL—Packet Sender can capture these requests) * Testing and development of new network protocols (send a packet, see if device behaves appropriately) * Reverse-engineering network protocols for security analysis (such as malware) * Troubleshooting secure connection ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Replay Attack
A replay attack (also known as a repeat attack or playback attack) is a form of network attack in which valid data transmission is maliciously or fraudulently repeated or delayed. This is carried out either by the originator or by an adversary who intercepts the data and re-transmits it, possibly as part of a spoofing attack by IP packet substitution. This is one of the lower-tier versions of a man-in-the-middle attack. Replay attacks are usually passive in nature. Another way of describing such an attack is: "an attack on a security protocol using a replay of messages from a different context into the intended (or original and expected) context, thereby fooling the honest participant(s) into thinking they have successfully completed the protocol run." Example Suppose Alice wants to prove her identity to Bob. Bob requests her password as proof of identity, which Alice dutifully provides (possibly after some transformation like hashing, or even salting, the password); meanwhil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Comparison Of Packet Analyzers
The following tables compare general and technical information for several packet analyzer software utilities, also known as network analyzers or packet sniffers. Please see the individual products' articles for further information. General information Basic general information about the software—creator/company, license/price, etc. Operating system support The utilities can run on these operating system An operating system (OS) is system software that manages computer hardware, software resources, and provides common services for computer programs. Time-sharing operating systems schedule tasks for efficient use of the system and may also in ...s. References {{Reflist Packet sniffers Network analyzers ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wireshark
Wireshark is a free and open-source packet analyzer. It is used for network troubleshooting, analysis, software and communications protocol development, and education. Originally named Ethereal, the project was renamed Wireshark in May 2006 due to trademark issues. Wireshark is cross-platform, using the Qt widget toolkit in current releases to implement its user interface, and using pcap to capture packets; it runs on Linux, macOS, BSD, Solaris, some other Unix-like operating systems, and Microsoft Windows. There is also a terminal-based (non-GUI) version called TShark. Wireshark, and the other programs distributed with it such as TShark, are free software, released under the terms of the GNU General Public License version 2 or any later version. Functionality Wireshark is very similar to tcpdump, but has a graphical front-end and integrated sorting and filtering options. Wireshark lets the user put network interface controllers into promiscuous mode (if supported by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Packet Capture
A packet analyzer, also known as packet sniffer, protocol analyzer, or network analyzer, is a computer program or computer hardware such as a packet capture appliance, that can intercept and log traffic that passes over a computer network or part of a network. Packet capture is the process of intercepting and logging traffic. As data streams flow across the network, the analyzer captures each packet and, if needed, decodes the packet's raw data, showing the values of various fields in the packet, and analyzes its content according to the appropriate RFC or other specifications. A packet analyzer used for intercepting traffic on wireless networks is known as a wireless analyzer or WiFi analyzer. While a packet analyzer can also be referred to as a network analyzer or protocol analyzer these terms can also have other meanings. Protocol analyzer can technically be a broader, more general class that includes packet analyzers/sniffers. However, the terms are frequently used interch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pcap
In the field of computer network administration, pcap is an application programming interface (API) for capturing network traffic. While the name is an abbreviation of ''packet capture'', that is not the API's proper name. Unix-like systems implement pcap in the ''libpcap'' library; for Windows, there is a port of libpcap named ''WinPcap'' that is no longer supported or developed, and a port named ''Npcap'' for Windows 7 and later that is still supported. Monitoring software may use libpcap, WinPcap, or Npcap to capture network packets traveling over a computer network and, in newer versions, to transmit packets on a network at the link layer, and to get a list of network interfaces for possible use with libpcap, WinPcap, or Npcap. The pcap API is written in C, so other languages such as Java, .NET languages, and scripting languages generally use a wrapper; no such wrappers are provided by libpcap or WinPcap itself. C++ programs may link directly to the C API or use an o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
TCP Packet
The Transmission Control Protocol (TCP) is one of the main protocols of the Internet protocol suite. It originated in the initial network implementation in which it complemented the Internet Protocol (IP). Therefore, the entire suite is commonly referred to as TCP/IP. TCP provides reliable, ordered, and error-checked delivery of a stream of octets (bytes) between applications running on hosts communicating via an IP network. Major internet applications such as the World Wide Web, email, remote administration, and file transfer rely on TCP, which is part of the Transport Layer of the TCP/IP suite. SSL/TLS often runs on top of TCP. TCP is connection-oriented, and a connection between client and server is established before data can be sent. The server must be listening (passive open) for connection requests from clients before a connection is established. Three-way handshake (active open), retransmission, and error detection adds to reliability but lengthens latency. Applicatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yersinia (computing)
Yersinia is a network security/ hacking tool for Unix-like operating systems, designed to take advantage of some weakness in different network protocols. Yersinia is considered a valuable and widely used security tool. As of 2017 Yersinia is still under development with a latest stable version number 0.8.2 available only aGitHub source code repository Attacks for the following network protocols are implemented: * Spanning Tree Protocol (STP) * Cisco Discovery Protocol (CDP) * Dynamic Trunking Protocol (DTP) * Dynamic Host Configuration Protocol (DHCP) * Hot Standby Router Protocol (HSRP) * IEEE 802.1Q * IEEE 802.1X * Cisco Inter-Switch Link (ISL) * VLAN Trunking Protocol (VTP) Yersinia was rated #59 aSecTools.Org: Top 125 Network Security Tools Similar Tools * Mausezahn a traffic generator for OSI layer two and above * Scapy an interactive Python Python may refer to: Snakes * Pythonidae, a family of nonvenomous snakes found in Africa, Asia, and Australia ** ''Pytho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
