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Operating System Fingerprinting
TCP/IP stack fingerprinting is the remote detection of the characteristics of a TCP/IP stack implementation. The combination of parameters may then be used to infer the remote machine's operating system (aka, OS fingerprinting), or incorporated into a device fingerprint. TCP/IP Fingerprint Specifics Certain parameters within the TCP protocol definition are left up to the implementation. Different operating systems, and different versions of the same operating system, set different defaults for these values. By collecting and examining these values, one may differentiate among various operating systems and implementations of TCP/IP. The TCP/IP fields that may vary include the following: * Initial packet size (16 bits) * Initial TTL (8 bits) * Window size (16 bits) * Max segment size (16 bits) * Window scaling value (8 bits) * "don't fragment" flag (1 bit) * "sackOK" flag (1 bit) * "nop" flag (1 bit) These values may be combined to form a 67-bit signature, or fingerprint, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Passive Figure
Passive may refer to: * Passive voice, a grammatical voice common in many languages, see also Pseudopassive (other), Pseudopassive * Passive language, a language from which an interpreter works * Passivity (behavior), the condition of submitting to the influence of one's superior * Passive-aggressive behavior, resistance to following through with expectations in interpersonal or occupational situations * Passive income, income resulting from cash flow received on a regular basis * Passive immunity, the transfer of active humoral immunity * Passive experience, observation lacking reciprocal interaction; and wrought with delusion of control. Science and technology * Passivation (chemistry), process of making a material "passive" in relation to another material prior to using the materials together * Passivity (engineering) a property of engineering systems, particularly in analog electronics and control systems * Passive solar building design, which uses (or avoids) sunligh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
FreeBSD
FreeBSD is a free-software Unix-like operating system descended from the Berkeley Software Distribution (BSD). The first version was released in 1993 developed from 386BSD, one of the first fully functional and free Unix clones on affordable home-class hardware, and has since continuously been the most commonly used BSD-derived operating system. FreeBSD maintains a complete system, delivering a kernel, device drivers, userland utilities, and documentation, as opposed to Linux only delivering a kernel and drivers, and relying on third-parties such as GNU for system software. The FreeBSD source code is generally released under a permissive BSD license, as opposed to the copyleft GPL used by Linux. The project includes a security team overseeing all software shipped in the base distribution. Third-party applications may be installed using the pkg package management system or from source via FreeBSD Ports. The project is supported and promoted by the FreeBSD Foundation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Attacks Against TCP
Attack may refer to: Warfare and combat * Attack (fencing) * Charge (warfare) * Offensive (military) * Strike (attack) Books and publishing * ''The Attack'' (novel), a book * '' Attack No. 1'', comic and animation * Attack! Books, a publisher * ''Attack!'' (publication), a tabloid publication of the National Alliance from 1969 to 1978 * ''Der Angriff'', a.k.a. ''The Attack'', a newspaper franchise * In newspaper headlines, to save space, sometimes " criticise" Films and television * '' Attack! The Battle of New Britain'', a 1944 American armed forces documentary film * ''Attack'' (1956 film), also known as ''Attack!'', a 1956 American war film * ''Attack'' (2016 film), a 2016 Telugu film * ''Attack'' (2022 film), a 2022 Hindi film * ''The Attack'' (1966 film), an Australian television play * ''The Attack'' (2012 film), a 2012 film directed by Ziad Doueiri * "The Attack" (''Australian Playhouse'') * "The Attack", a season 7 episode of ''Lego Ninjago: Masters of Spinj ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HTTP
HTTP (Hypertext Transfer Protocol) is an application layer protocol in the Internet protocol suite model for distributed, collaborative, hypermedia information systems. HTTP is the foundation of data communication for the World Wide Web, where hypertext documents include hyperlinks to other resources that the user can easily access, for example by a Computer mouse, mouse click or by tapping the screen in a web browser. Development of HTTP was initiated by Tim Berners-Lee at CERN in 1989 and summarized in a simple document describing the behavior of a client and a server using the first HTTP version, named 0.9. That version was subsequently developed, eventually becoming the public 1.0. Development of early HTTP Requests for Comments (RFCs) started a few years later in a coordinated effort by the Internet Engineering Task Force (IETF) and the World Wide Web Consortium (W3C), with work later moving to the IETF. HTTP/1 was finalized and fully documented (as version 1.0) in 1996 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HP Switch Protocol
HP may refer to: Businesses, groups, organisations * HP Inc., an American technology company ** Hewlett-Packard, the predecessor to HP before the 2015 split ** Hewlett Packard Enterprise, the other company created as a result of the split * HP Foods, British food products company * Handley Page, an aircraft company * Hindustan Petroleum, Indian petroleum company, subsidiary of Oil and Natural Gas Corporation * America West Airlines (1981–2006), an American airline (IATA code HP) * Amapola Flyg (2004–present), a Swedish airline (IATA code HP) * HP Books, an imprint of the Penguin Group * Populist Party (Turkey) (''Halkçı Parti''), a political party in Turkey between 1983 and 1985 Brands, products, items * Aero Adventure Aventura HP, an ultralight amphibian aircraft * China Railways HP, heavy freight train steam locomotive * Hilton-Pacey HP (car), a British 1920s 3-wheeled cyclecar automobile *HP Sauce, British sauce named after Houses of Parliament * Hy-Tek HP, a single-e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cisco Discovery Protocol
Cisco Discovery Protocol (CDP) is a proprietary protocol, proprietary data link layer protocol developed by Cisco Systems in 1994 by Keith McCloghrie and Dino Farinacci. It is used to share information about other directly connected Cisco equipment, such as the operating system version and IP address. CDP can also be used for On Demand Routing, On-Demand Routing, which is a method of including routing information in CDP announcements so that dynamic routing protocols do not need to be used in simple networks. Operation Cisco devices send CDP announcements to the destination MAC address , out each connected network interface controller, network interface. These multicast Frame (networking), frames may be received by Cisco network switch, switches and other networking devices that support CDP into their connected network interface. This multicast destination is also used in other Cisco protocols such as VTP, Virtual Local Area Network (VLAN) Trunking Protocol (VTP). By default, C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Network Access Control
Network access control (NAC) is an approach to computer security that attempts to unify endpoint security technology (such as antivirus, host intrusion prevention, and vulnerability assessment), user or system authentication and network security enforcement. Description Network access control is a computer networking solution that uses a set of protocols to define and implement a policy that describes how to secure access to network nodes by devices when they initially attempt to access the network. NAC might integrate the automatic remediation process (fixing non-compliant nodes before allowing access) into the network systems, allowing the network infrastructure such as routers, switches and firewalls to work together with back office servers and end user computing equipment to ensure the information system is operating securely before interoperability is allowed. A basic form of NAC is the 802.1X standard. Network access control aims to do exactly what the name implies— ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PacketFence
PacketFence is an open-source network access control (NAC) system that provides the following features: registration, detection of abnormal network activities, proactive vulnerability scans, isolation of problematic devices, remediation through a captive portal, 802.1X, wireless integration and User-Agent / DHCP fingerprinting. The company that develops PacketFence, Inverse Inc. was acquired by Akamai Technologies on February 1, 2021. PacketFence version 10 supports Red Hat Enterprise Linux 7 and its derivatives, notably CentOS, and Debian Stretch. Inverse Inc. has also been releasing a version of PacketFence dubbed the "Zero Effort NAC", which is a standalone Virtual Appliance that is preconfigured installation of PacketFence, making it easier than ever to deploy a NAC in your environment. PacketFence version 11 added support for Red Hat Enterprise Linux 8 and it's derivatives, notably CentOS, and Debian Bullseye. Further reading * * * * * * * * External linksP ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nmap
Nmap (Network Mapper) is a network scanner created by Gordon Lyon (also known by his pseudonym ''Fyodor Vaskovich''). Nmap is used to discover hosts and services on a computer network by sending packets and analyzing the responses. Nmap provides a number of features for probing computer networks, including host discovery and service and operating system detection. These features are extensible by scripts that provide more advanced service detection, vulnerability detection, and other features. Nmap can adapt to network conditions including latency and congestion during a scan. Nmap started as a Linux utility and was ported to other systems including Windows, macOS, and BSD. It is most popular on Linux, followed by Windows. Features Nmap features include: * Fast scan (''nmap -F arget') – Performing a basic port scan for fast result. * Host discovery – Identifying hosts on a network. For example, listing the hosts that respond to TCP and/or ICMP requests or have a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ettercap (computing)
Ettercap is a free and open source network security tool for man-in-the-middle attacks on a LAN. It can be used for computer network protocol analysis and security auditing. It runs on various Unix-like operating systems including Linux, Mac OS X, BSD and Solaris, and on Microsoft Windows. It is capable of intercepting traffic on a network segment, capturing passwords, and conducting active eavesdropping against a number of common protocols. Its original developers later founded Hacking Team. Functionality Ettercap works by putting the network interface into promiscuous mode and by ARP poisoning the target machines. Thereby it can act as a 'man in the middle' and unleash various attacks on the victims. Ettercap has plugin support so that the features can be extended by adding new plugins. Features Ettercap supports active and passive dissection of many protocols (including ciphered ones) and provides many features for network and host analysis. Ettercap offers four modes of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Linux
Linux ( ) is a family of open source Unix-like operating systems based on the Linux kernel, an kernel (operating system), operating system kernel first released on September 17, 1991, by Linus Torvalds. Linux is typically package manager, packaged as a Linux distribution (distro), which includes the kernel and supporting system software and library (computing), libraries—most of which are provided by third parties—to create a complete operating system, designed as a clone of Unix and released under the copyleft GPL license. List of Linux distributions, Thousands of Linux distributions exist, many based directly or indirectly on other distributions; popular Linux distributions include Debian, Fedora Linux, Linux Mint, Arch Linux, and Ubuntu, while commercial distributions include Red Hat Enterprise Linux, SUSE Linux Enterprise, and ChromeOS. Linux distributions are frequently used in server platforms. Many Linux distributions use the word "Linux" in their name, but the Free ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
