Hi,

I'm trying to block p2p traffic via pf on OpenBSD 3.x.

Unfortunately, all new p2p-clients are able to use dynamic ports or even
(ab-)use http-ports etc. so blocking well known p2p-ports is not enough.

Apart from blocking ports I just see two possibilities:
- slow connections down very hard on well known
  p2p-ports, so the p2p-clients can connect but
  don't get speed at all (still, other dynamic
  ports could be used)
- try to look into each datagram and scan for
  typical p2p-stuff (what is "typical", this
  approach would cost to much computing time)

Any hints? Unfortunately, I didn't find a lot of stuff regarding this
exept the well known 'iptables-p2p' which is a match module for iptables
but hey, I love pf :-)

CU
  David

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