port 80


Also found in: Dictionary, Thesaurus, Medical, Legal.

port 80

(1) The number that identifies network packets as Web transactions. All port numbers reside in the header of the packets, and requests that are marked port 80 are processed by the Web server (see TCP/IP port). Port 80 requests may activate any number of different server-side processes before a Web page or some other file is returned to the user. For a list of common port numbers, see well-known port. See port forwarding and HTTP.

(2) An input/output address (port 80h) in a PC that is used to send power-on codes. See POST code and PC I/O addressing.
Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.
References in periodicals archive ?
Once your computer locates the correct IP address, it'll try to communicate with the Web server at that address using HTTP (TCP port 80).
Web server traffic will be directed to the Web server IP address on TCP port 80. Any other traffic to the Web server is considered suspicious and can be directed towards a' honeypot.
Port 80 is reserved for acceptance of the hypertext transfer protocol (HTTP) requests.
Perhaps the fact that it spreads via the standard Internet HTTP (Hypertext Transport Protocol) port 80. This port is commonly left open on firewalls to allow access to company Web sites.
HOST:* -> COMPAR2/VIEZIT: X METHOD TCP PORT 80 This rule specifies only incoming TCP connections on port 80 are to be allowed, but not outgoing, connections (see Figure 2).
For example, Morris discusses setting up the Web server on a UNIX system at port 80 - the usual port.
Attack Traffic and Security: Port 80 overtakes Port 445 to become the most targeted port
For the first time since the inaugural State of the Internet Report (first quarter of 2008), Port 445 (Microsoft DS) was not the most targeted port for attacks, dropping to third place at 15 percent behind Port 443 (SSL [HTTPS]) at 17 percent and Port 80 (WWW [HTTP] at 24 percent.
It found that security and network managers who believe they can reduce most of their risk by focusing on analysing traffic flowing with port 80 are making a dangerous miscalculation.
The most important thing to realise about Web browser client software, he says, is that it is designed to access a variety of Web sites, typically using Port 80 for regular HTTP access, and Port 443 for HTTPS access.
The Linktivity software uses a port that is open to the Internet, port 80. Unless someone has blocked Internet access to their firewall, then you do not have any problems.
This allows the use of common browsers and Web-based clients at the agent level with no fussing around with firewalls--since HTTP (port 80) and HTTPS (port 443) don't require special programming and permissions from IT security experts.