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Common Log Format
For computer log management, the Common Log Format, also known as the NCSA Common log format, (after NCSA HTTPd) is a standardized text file format used by web servers when generating server log files. Because the format is standardized, the files can be readily analyzed by a variety of web analysis programs, for example Webalizer and Analog. Each line in a file stored in the Common Log Format has the following syntax: host ident authuser timestamp request-line status bytes The format is extended by the Combined Log Format with referer and user-agent fields. Example 127.0.0.1 ident alice 1/May/2025:07:20:10 +0000"GET /index.html HTTP/1.1" 200 9481 A field set to dash () indicates missing data. * is the IP address of the client (remote host) which made the request to the server. * is the RFC 1413 identity of the client, if supplied. * is the userid of the person requesting the document. Missing unless HTTP authentication is used. * is the request timestamp. Her ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Log Management
Log management is the process for generating, transmitting, storing, accessing, and disposing of log data. A log data (or ''logs'') is composed of entries (records), and each entry contains information related to a specific event that occur within an organization's computing assets, including physical and virtual platforms, networks, services, and cloud environments. The process of log management generally breaks down into: * Log collection - a process of capturing actual data from log files, application standard output stream (Standard streams, stdout), network Network socket, socket and other sources. * Logs aggregation (centralization) - a process of putting all the log data together in a single place for the sake of further analysis or/and retention. * Log storage and retention - a process of handling large volumes of log data according to corporate or regulatory policies (compliance). * Log analysis - a process that helps operations and security team to handle system performa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ident Protocol
The Ident Protocol (Identification Protocol, Ident), specified iRFC 1413 is an Internet protocol that helps identify the user of a particular TCP connection. One popular daemon program for providing the ident service is identd. Function The Ident Protocol is designed to work as a server daemon, on a user's computer, where it receives requests to a specified TCP port, generally 113. In the query, a client specifies a pair of TCP ports (a local and a remote port), encoded as ASCII decimals and separated by a comma (,). The server then sends a response that identifies the username of the user who runs the program that uses the specified pair of TCP ports, or specifies an error. Suppose host A wants to know the name of the user who is connecting to its TCP port 23 (Telnet) from the client's (host B) port 6191. Host A would then open a connection to the ident service on host B, and issue the following query: 6191, 23 As TCP connections generally use one unique local port (619 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Data Logging
A data logger (also datalogger or data recorder) is an electronic device that records data over time or about location either with a built-in instrument or sensor or via external instruments and sensors. Increasingly, but not entirely, they are based on a digital processor (or computer), and called digital data loggers (DDL). They generally are small, battery-powered, portable, and equipped with a microprocessor, internal memory for data storage, and sensors. Some data loggers interface with a personal computer and use software to activate the data logger and view and analyze the collected data, while others have a local interface device (keypad, LCD) and can be used as a stand-alone device. Data loggers vary from general-purpose devices for various measurement applications to very specific devices for measuring in one environment or application type only. While it is common for general-purpose types to be programmable, many remain static machines with only a limited number o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Web Counter
A web counter or hit counter is a publicly displayed running tally of the number of visits a webpage has received. Web counters are usually displayed as an inline digital image or in plain text. Image rendering of digits may use a variety of fonts and styles, with a classic design imitating the wheels of an odometer. Web counters were often accompanied by the date it was set up or last reset, to provide more context to readers on how to interpret the number shown. Although initially a way to publicly showcase a site's popularity to its visitors, some early web counters were simply web bugs used by webmasters to track hits and included no visible on-page elements. Counters were popular in the 1990s, but were later replaced by other web traffic measures such as self-hosted scripts like Analog, and later on by remote systems that used JavaScript, like Google Analytics. These systems typically do not include on-page elements displaying the count. Thus, seeing a web counter on a mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Log Management And Intelligence
Log management is the process for generating, transmitting, storing, accessing, and disposing of log data. A log data (or ''logs'') is composed of entries (records), and each entry contains information related to a specific event that occur within an organization's computing assets, including physical and virtual platforms, networks, services, and cloud environments. The process of log management generally breaks down into: * Log collection - a process of capturing actual data from log files, application standard output stream (stdout), network socket and other sources. * Logs aggregation (centralization) - a process of putting all the log data together in a single place for the sake of further analysis or/and retention. * Log storage and retention - a process of handling large volumes of log data according to corporate or regulatory policies (compliance). * Log analysis - a process that helps operations and security team to handle system performance issues and security incidents ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extended Log Format
{{No footnotes, date=July 2023 Extended Log Format (ELF) is a standardized text file format that is used by web servers when generating log files. In comparison to the Common Log Format (CLF), ELF provides more information and flexibility. Example #Version: 1.0 #Date: 12-Jan-1996 00:00:00 #Fields: time cs-method cs-uri 00:34:23 GET /foo/bar.html 12:21:16 GET /foo/bar.html 12:45:52 GET /foo/bar.html 12:57:34 GET /foo/bar.html See also * Common Log Format For computer log management, the Common Log Format, also known as the NCSA Common log format, (after NCSA HTTPd) is a standardized text file format used by web servers when generating server log files. Because the format is standardized, the fil ... Sources Extended Log File Format*as described in the documentation of the World Wide Web consortia webserver ( W3C httpd). Log file formats ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Byte
The byte is a unit of digital information that most commonly consists of eight bits. Historically, the byte was the number of bits used to encode a single character of text in a computer and for this reason it is the smallest addressable unit of memory in many computer architectures. To disambiguate arbitrarily sized bytes from the common 8-bit definition, network protocol documents such as the Internet Protocol () refer to an 8-bit byte as an octet. Those bits in an octet are usually counted with numbering from 0 to 7 or 7 to 0 depending on the bit endianness. The size of the byte has historically been hardware-dependent and no definitive standards existed that mandated the size. Sizes from 1 to 48 bits have been used. The six-bit character code was an often-used implementation in early encoding systems, and computers using six-bit and nine-bit bytes were common in the 1960s. These systems often had memory words of 12, 18, 24, 30, 36, 48, or 60 bits, corresponding t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HTTP Status Code
Hypertext Transfer Protocol (HTTP) response status codes are issued by a server in response to a client's request made to the server. It includes codes from IETF Request for Comments (RFCs), other specifications, and some additional codes used in some common applications of the HTTP. The first digit of the status code specifies one of five standard classes of responses. The optional message phrases shown are typical, but any human-readable alternative may be provided, or none at all. Unless otherwise stated, the status code is part of the HTTP standard. The Internet Assigned Numbers Authority (IANA) maintains the official registry of HTTP status codes. All HTTP response status codes are separated into five classes or categories. The first digit of the status code defines the class of response, while the last two digits do not have any classifying or categorization role. There are five classes defined by the standard: * ''1xx informational response'' – the request was rece ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hypertext Transfer Protocol
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 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. It evolved ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HTTP Authentication (other)
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HTTP authentication may refer to: * Basic access authentication * Digest access authentication Digest access authentication is one of the agreed-upon methods a web server can use to negotiate credentials, such as username or password, with a user's web browser. This can be used to confirm the identity of a user before sending sensitive info ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
User-agent
In computing, the User-Agent header is an HTTP header intended to identify the user agent responsible for making a given HTTP request. Whereas the character sequence User-Agent comprises the name of the header itself, the header value that a given user agent uses to identify itself is colloquially known as its user agent string. The user agent for the operator of a computer used to access the Web has encoded within the rules that govern its behavior the knowledge of how to negotiate its half of a request-response transaction; the user agent thus plays the role of the client in a client–server system. Often considered useful in networks is the ability to identify and distinguish the software facilitating a network session. For this reason, the User-Agent HTTP header exists to identify the client software to the responding server. Use in client requests When a software agent operates in a network protocol, it often identifies itself, its application type, operating system, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
