[Esa-l] Re: Felix Navidad ... Stripping Attachments

John D. Hardin jhardin at wolfenet.com
Sun Dec 3 18:11:03 PST 2000

On Sat, 2 Dec 2000, John D. Hardin wrote:

> Okay, I'm going to release 1.124 this weekend with some minor fixes
> and the TNEF stripper. I also hope to clean up the home page a bit.

Done. What do you all think of the new web site?

> The stripper will be genericised. You will be able to specify a
> second list of filespecs, separate from the poisoned list.

Nope. I'm redesigning this a bit. Here's the idea:

There are four possible things to do to an attached file:
  Allow it to pass unchanged;
  Mangle the filename;
  Strip it off the message;
  Poison the message.

(Am I missing anything here?)

Policy files will allow you to associate a handling with a filespec,
and having multiple policy files processed in order will allow you to
do something like:

  poison double-extensions,
  poison known evil files,
  poison dangerous executable formats,
  allow documents,
  mangle executable filenames,
  accept the rest.

The first matching rule applies (an "attachment firewall"?)

Or, if you are really paranoid:

  accept specific extension (e.g. *.jpg),
  poison known evil files,
  mangle the rest.

This will make site customization much easier.


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