[Snort-sigs] Snorting gzip encoded http source code
Jason.Haar at ...651...
Mon Aug 30 16:44:21 EDT 2004
On Mon, Aug 30, 2004 at 06:58:09PM +0000, Abe Use wrote:
> I suppose I'll have my users connect through a proxy, and I'll have it
> strip or replace the "accept encoding gzip" portion of the header- so that
> I can match content plain-text. Would be cool though if snort was able to
> inflate the gzip'd stream, and look through the content... or save the
> stream and I could use something else to parse through it...
Yes - that feature makes NIDS increasingly useless for Web traffic. Similar
problem to HTTPS - and I think your solution mis similar to how we handle
HTTPS (put in a reverse proxy and sniff the unencrypted side). However
it'll mean you don't get any of the performance benefits of compressed
traffic - which is a pity...
A "uncompressor" preprocessor would be nice - but I have no idea what the
performance impact would be...
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