If you're interested in developing/using security auditing tools, or if you want to know what I've been doing for the past year, you may like to read: ftp://coast.cs.purdue.edu/pub/doc/network/muffett-wanhack.ps.gz ...a paper which will be presented at this year's USENIX Security Symposium in Salt Lake City, June 4th..6th. - alec (followups to comp.security.unix) -- Alec Muffett "GARGLING WITH TCP" Sun Microsystems (UK) Network Security Group (speaking for himself, not his employers)