Alan Freedman -- The Computer Language Company - Computer Desktop Encyclopedia
Computer Desktop Encyclopedia
Longest-Running Tech Reference on the Planet

A CDE Definition

You'll love The Computer Desktop Encyclopedia (CDE) for Tech Term of the Day (TTOD)


DNS pinning

See DNS rebinding.

DNS rebinding

A method for obtaining unauthorized access to the local network by fooling the Web browser into switching IP addresses from the Web server to a local computer. It is used to steal company information, compromise unprotected client machines and hijack IP addresses for spam, click fraud and other malevolent purposes.

When a user requests a Web page from an attacker's site, the attacker's DNS server returns the IP address of its Web server with an extremely short time to live (TTL). The page that gets downloaded contains malicious code that binds the local IP address to the hostname of the attacker's site. The next query to the attacker's site becomes a query to the local machine. See TTL.

DNS Pinning
A function built into most Web browsers, DNS pinning ignores the TTL returned from the DNS server and keeps the Web server IP address "pinned" to the original hostname for up to several minutes. However, active technologies such as Java and Flash are also vulnerable to DNS rebinding. They use separate pin databases and have their own access to the network.

Personal Use Only

Before/After Your Search Term
DNP3DNS poisoning
DNRDNS rebinding
DNSDNS records
DNS cache poisoningDNS server
DNS failureDNS Service Discovery
DNS hijackingDNSBL
DNS nameDNSSec
DNS name resolutionDNT
DNS parkingDNT browser

Terms By Topic
Click any of the following categories for a list of fundamental terms.
Computer Words You Gotta KnowSystem design
Job categoriesUnix/Linux
Interesting stuffPersonal computers
InternetIndustrial Automation/Process Control
Communications & networkingAssociations/Standards organizations
HistoryDesktop publishing
ProgrammingHealthcare IT
System design