[tor-relays] does it make sense to close unused ports at a tor relay with iptables ?

[Green Dream]

> The likes of GRC.COM <http://grc.com/> make you think that any port not
blocked... is bad.
> I wondered why if nothing there

Because there is a difference between a closed port and a filtered port.
Deny vs drop. The less of a fingerprint you offer to attackers, the better.
It's security by obscurity to an extent, but even a response from a closed
port can give away clues about the software, OS and network stack that's
running.
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