Re: Stripping MIME attachments at FW-1

[Darren Reed <darrenr () reed wattle id au>]

Whilst this has nothing at all to do with FW-1, it does have some
relevance for MIME "stripping".  I posted a full copy of smap.c to
fwtk-users, for those who don't read that (and still use smap :)
I've put patches at:

http://coombs.anu.edu.au/~avalon/smap.diff.txt

Darren

> Subject: Extensions to smap for MIME filtering.
> To: fwtk-users () tis com
> Date: Sat, 20 May 2000 16:13:42 +1000 (EST)
>
>
> Hi,
>    I've just spent a few hours hacking on smap to do MIME filtering.
> I will `erase' certain MIME content (replace it all with X's) or change
> MIME types from one to another.  There are also a bunch of extensions to
> do header stripping and provide protection from bounce attacks.  This is
> based on the original 2.1 - I've not really followed what others have
> done to avoid relaying.
>
>    The extensions are all accessible through the config file as follows:
>
> smap: localnet 192.168 10
> smap: erase-mime */badmime
> smap: convert-mime */badbad text/plain
> smap: localdomains local.com domain.com
>
> both erase-mime and convert-mime allow for wildcards in the MIME type
> (only * and ?) and are case insensitive.  Hosts connecting from networks
> which match "localnet" have "Received:" headers stripped.  parameters for
> "convert-mime" *MUST* be given in pairs!
>
>    BTW, I apologise in advance if this duplicates the work of others, I've
> been paying very little attention to this list, except with the 'd' key.
>
> Darren