Firewall Wizards mailing list archives

Re: Variations of firewall ruleset bypass via FTP


From: Carson Gaspar <carson () taltos org>
Date: Thu, 10 Oct 2002 23:00:11 -0400



--On Thursday, October 10, 2002 10:40 PM -0400 "Paul D. Robertson" <proberts () patriot net> wrote:

One of the things that makes FTP such a bad case is that protecting the
server means going to active FTP and protecting the clients means going
to  PASV mode.  So there's not a natural protection point that allows
both to  be satisfied.

An application proxy that does PASV->PORT translation achieves exactly this. Trivial to do (and was done in FWTK ftp-gw years ago).

--
Carson
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