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2.0 DSLR Port Scans
It is implemented as a java applet that simply reports back the results of a port scan done by the server. This scan simply reports on a few common vulnerabilities.
The slightly more extensive scan system has a queue, as each test can take a while. There are usually a few people 'waiting' in this queue so the scan is not instant.
If you requested 'ping of death' tests, then some ping of death packets are sent to your machine, to see if this will crash your operating system.
If you have a Cisco router, it is probed to see if the IOS is protected or not.
None of these default tests will damage anything. It is possible, but only remotely, that the 'ping of death' tests could cause disk corruption since the OS may freeze in the middle of writing a file. If you are not using your PC for something else, this is extremely unlikely. (Turn off your defragger if you run that overnight though!).
If a request is logged, this releases the scan. Therefore, if your scan has gone into hold status, you must find some way of running an FTP or Telnet request to this site to release it.
Why? Because we want to publish summaries of the security vulnerabilities we fiind. At no time will we reveal your IP address associated with the security scan results. Even the email of results do not reveal your IP address.
Simple things like turning off file sharing can be enough while you do some further reading.
That said, if you use IRC and ICQ a lot, and tread on the toes of strangers online, then you should probably at least run a software firewall. It is also highly recommended that you install some type of virus scanner and keep its virus definitions updated. You can find more information to help in the Security Forum.
Zonealarm for Windows platforms is popular and has a free version.
An ipchains firewall script in your startup is recommended for Linux.
Netbarrier seems to show a lot of information for Macintosh users.