Depends on your threat model. Freenet traffic clearly doesn't look like these 
without proper stego transport plugins, and the connections between nodes 
definitely don't look like them, unless what you are imitating is purely peer 
to peer, in which case you need to look at the other nodes' connections as 
well and/or the timing. Also, we can't use TCP at the moment.

On Saturday 16 May 2009 23:52:15 Arne Babenhauserheide wrote:
> Hi, 
> 
> It would be nice, if I could tell freenet to use standard ports for 
> communication - especially for connections inside a LAN (where the 
possibility 
> that an admin is watching all used ports might be a bit higher than on the 
> internet). 
> 
> I'd think it would be useful to just test a list of ports normally used for 
> communication (ideally encrypted), so that encrypted data wouldn't draw 
> suspicions (and so we don't need to implement full steganography at once, 
but 
> can move towards it). 
> 
> Maybe the option could include a list with the note "Only select services 
you 
> DON'T want to run!"
> 
> Some ideas, not all encrypted: 
> 
> - 2190/UDP  TiVoConnect Beacon
> - 2593/TCP,UDP  RunUO—Ultima Online server
> - 3723/TCP,UDP  Used by many Battle.net Blizzard games (Diablo II, Warcraft 
> II, Warcraft III, StarCraft)
> - 3724/TCP,UDP  World of Warcraft Online gaming MMORPG
> - 4000/TCP,UDP  Diablo II game
> - 6619/TCP,UDP  odette-ftps, Odette File Transfer Protocol (OFTP) over 
TLS/SSL
> - 6891–6900/TCP,UDP  Windows Live Messenger (File transfer)
> - 6901/TCP,UDP  Windows Live Messenger (Voice)
> - 28910  Nintendo Wi-Fi Connection
> 
> (all information from 
> http://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers 
> I'm sure there are more...)
> 
> Is tehre any danger in using known ports? 
> 
> Best wishes, 
> Arne

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