firewalking
(fīr´wâk-ing) (n.) Developed by Mike Schiffman and David Goldsmith, a technique for testing the vulnerability of a firewall and mapping the routers of a network that sits behind a firewall. Firewalking is a method of disguising port scans. In practical applications, firewalking is similar to tracerouting and works by sending into the firewall TCP or UDP packets that have a TTL set at one hop greater than the targeted firewall. If the packet makes it through the gateway, it is forwarded to the next hop where the TTL equals zero and elicits a TTL “exceeded in transit” message, at which point the packet is discarded. Using this method, access information on the firewall can be determined if successive probe packets are sent.
Other forms: firewalk (v.)
Read Also:
- Firewall (Firewall Techniques)
A firewall is a system designed to prevent unauthorized access to or from a private network. Firewalls can be implemented in both hardware and software, or a combination of both. How are Firewalls Used? Firewalls are frequently used to prevent unauthorized Internet users from accessing private networks connected to the Internet, especially intranets. All messages […]
- Firmware
Software (programs or data) that has been written onto read-only memory (ROM). Firmware is a combination of software and hardware. ROMs, PROMs and EPROMs that have data or programs recorded on them are firmware.
- First Sale Doctrine
A legal principle that limits a rightsholder’s rights to control content after it has been sold for the first time. According to first sale doctrine, lawful ownership of an item, such as a music CD or a book, is not the same as owning the copyright of the item. The owner of the item may […]
- firstplay
In video editing, firstplay is the first track played on a DVD video or film. Usually it is a short video clip displaying logos, such as Dolby Digital and other company logos, or an FBI warning. Contrast with extro, the last clip on a disc.
- fishbowl virtual reality
Fishbowl virtual reality or fishbowl VR refers to virtual reality environments that are viewed on a computer system, rather than projection or holographic displays. Analogous to users watching a computer monitor as one would watch a fishbowl. Also called desktop virtual reality or desktop VR.