On Thu, 14 Jan 1999 07:54:44 +0200 Arik Sudman <[EMAIL PROTECTED]> scribbled: this has probably come up before and practically, whether there are products that claim to do this or not... you will not be able to guarantee your filtering will succeed 100% of the time. why ? because all somebody has to do is encrypt their outbound email.. but if you really insist upon doing it ... just setup a special mail-server and modify the sources to smap/sendmail or whatever smtp daemon you use and then filter the mail queue before relaying it.... or even quick and dirty scripts..ie grep -i -l -f keywords.txt /var/spool/mqueue/df* but even _if_ you were able to decrypt outbound encrypted email, you would fail to catch those who are using a pre-arranged substitution system using keyphrases to indicate to their accomplices restricted information.... hope this helps. /Norman | We have got a requirement from our security officer to have content | filtering on our outgoing internet mail. | I believe what they want is something that may block business | sensitive data | going out. | So what is needed basically is a software that will filter and trap | messages | by filtering data in | email and attachments - based on keyword and phrases. | | While doubting the merits of such a product (how to define data base | to | describe biz sensitive data?) | does anyone knows of a product that do so? | interfacing with either FW-1 or Exchange server? -- -------------------------------------------------------------- Paladin Corporation Pty Ltd. ACN 081 191 611 N�rman W�dders NW296-AU Ph: +612 9835-4782 Fax: +612 9864-0487 Anti-Spam links at: http://www.paladincorp.com.au/spam.html - [To unsubscribe, send mail to [EMAIL PROTECTED] with "unsubscribe firewalls" in the body of the message.]
