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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Stopping ip range scans
On Mon, 29 Dec 2003 [email protected] wrote: > Recently (this year...) I've noticed increasing number of ip range scans > of various types that envolve one or more ports being probed for our > entire ip blocks sequentially. At first I attributed all this to various What ports are being probed? SOP for script kiddies for at least 10 years has been find a box you can hack root on, install a vulnerability scanner for the remote-root vulnerability d'jour, fire it up, and come back in a day or so to see what you've found. Then hack the newly found vulnerable boxes, install the scanner on each of them, and repeat the process. Some of these packages have done things like download the .com zone (back when F allowed this) and scan all NS's for bind vulnerabilities. Others just pick a random IP and scan sequentially higher IPs. More recently, some packages have combined the scanning and hacking. If you don't want the scans, block everything you don't want at your router. Otherwise, just make sure your systems are up to date. A common OS with unpatched known remotely exploitable holes doesn't last long on an unfiltered internet connection. ---------------------------------------------------------------------- Jon Lewis *[email protected]*| I route Senior Network Engineer | therefore you are Atlantic Net | _________ http://www.lewis.org/~jlewis/pgp for PGP public key_________
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