# HTTP - Audio over HyperText Transfer Protocol (RFC 2616)# Pattern attributes: good notsofast notsofast subset# Protocol groups: streaming_audio document_retrieval ietf_draft_standard# Wiki: http://protocolinfo.org/wiki/HTTP# Copyright (C) 2008 Matthew Strait, Ethan Sommer; See ../LICENSE## Usually runs on port 80## Contributed by Deepak Seshadri <dseshadri AT broadbandmaritime.com>## This pattern has been tested and is believed to work well.## To get or provide more information about this protocol and/or pattern:# http://www.protocolinfo.org/wiki/HTTP# http://lists.sourceforge.net/lists/listinfo/l7-filter-developers## If you use this, you should be aware that:## - they match both simple downloads of audio/video and streaming content.## - blocking based on content-type encourages server# writers/administrators to misreport content-type (which will just make# headaches for everyone, including us), so I would strongly recommend# shaping audio/video down to a speed that discourages use of streaming# players without actually blocking it.## - obviously, since this is a subset of HTTP, you need to match it# earlier in your iptables rules than HTTP.httpaudiohttp/(0\.9|1\.0|1\.1)[\x09-\x0d ][1-5][0-9][0-9][\x09-\x0d -~]*(content-type: audio)