Storage Technology has announced the release of a new filter system in its Net Sentry security line, designed to prevent denial of service hacker attacks, such as the currently rampant ?Ping of Death?.
The majority of networked computers rely on an electric echo or ?ping? to discover whether another machine is operating. Once the ping has been returned the machine will proceed to communicate. A smart young cyber-terrorist discovered a flaw present in most computer systems and proceeded to publicise it to his fellow hackers. Having obtained the IP address of the target machine, the intruder sends a ping in excess of 65,536 bytes. This is more information than the victim can interpret and the machine will shut down.
Unix, Windows NT, Windows 95 and Macintosh systems have all been affected by this plague in recent weeks. It is the latest in a spate of denial of service attacks, which particularly afflict Internet service providers, and which most security and networking companies are seeking to address in new products.
Storagetek?s Network Systems Group has produced Net Sentry to filter out pings, or ICMP echoes, which are too large for the victim machines to handle.
The Net Sentry operates in a similar way to a traditional firewall surrounding the local network. It is offered as a package with existing Storagetek firewall and password products.
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