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- Banner_grabbing abstract "Banner grabbing is a technique used to glean information about a computer system on a network and the services running on its open ports. Administrators can use this to take inventory of the systems and services on their network. However, an intruder can use banner grabbing in order to find network hosts that are running versions of applications and operating systems with known exploits.Some examples of service ports used for banner grabbing are those used by Hyper Text Transfer Protocol (HTTP), File Transfer Protocol (FTP), and Simple Mail Transfer Protocol (SMTP); ports 80, 21, and 25 respectively. Tools commonly used to perform banner grabbing are Telnet, which is included with most operating systems, and Netcat.For example, one could establish a connection to a target web server using Netcat, then send an HTTP request. The response will typically contain information about the service running on the host:[root@prober] nc www.targethost.com 80HEAD / HTTP/1.1HTTP/1.1 200 OKDate: Mon, 11 May 2009 22:10:40 ESTServer: Apache/2.0.46 (Unix) (Red Hat/Linux)Last-Modified: Thu, 16 Apr 2009 11:20:14 PSTETag: \"1986-69b-123a4bc6\"Accept-Ranges: bytesContent-Length: 1110Connection: closeContent-Type: text/htmlThis information may be used by an administrator to catalog this system, or by an intruder to narrow down a list of applicable exploits.To prevent this, network administrators should restrict access to services on their networks and shut down unused or unnecessary services running on network hosts.".
- Banner_grabbing wikiPageID "22816582".
- Banner_grabbing wikiPageLength "1783".
- Banner_grabbing wikiPageOutDegree "9".
- Banner_grabbing wikiPageRevisionID "694073060".
- Banner_grabbing wikiPageWikiLink Category:Computer_network_security.
- Banner_grabbing wikiPageWikiLink File_Transfer_Protocol.
- Banner_grabbing wikiPageWikiLink Host_(network).
- Banner_grabbing wikiPageWikiLink Hypertext_Transfer_Protocol.
- Banner_grabbing wikiPageWikiLink Netcat.
- Banner_grabbing wikiPageWikiLink Operating_system.
- Banner_grabbing wikiPageWikiLink Port_(computer_networking).
- Banner_grabbing wikiPageWikiLink Simple_Mail_Transfer_Protocol.
- Banner_grabbing wikiPageWikiLink Telnet.
- Banner_grabbing wikiPageWikiLinkText "service banners".
- Banner_grabbing wikiPageUsesTemplate Template:Orphan.
- Banner_grabbing subject Category:Computer_network_security.
- Banner_grabbing hypernym Technique.
- Banner_grabbing type TopicalConcept.
- Banner_grabbing comment "Banner grabbing is a technique used to glean information about a computer system on a network and the services running on its open ports. Administrators can use this to take inventory of the systems and services on their network.".
- Banner_grabbing label "Banner grabbing".
- Banner_grabbing sameAs Q4856937.
- Banner_grabbing sameAs m.063z8ky.
- Banner_grabbing sameAs Q4856937.
- Banner_grabbing wasDerivedFrom Banner_grabbing?oldid=694073060.
- Banner_grabbing isPrimaryTopicOf Banner_grabbing.