On Sat, 1 Mar 2008, Fernando Gont wrote:
Folks,
This patch changes the default ephemeral port range from 49152-65535 to
1024-65535. This makes it harder for an attacker to guess the ephemeral ports
(as the port number space is larger). Also, it makes the chances of port
number collisions smaller.
(http://www.ietf.org/internet-drafts/draft-ietf-tsvwg-port-randomization-01.txt)
There are a number of commonly used ports above 1000, such as nfs and x11.
I think OpenBSD uses 10000-65535, maybe that's a safer choice to go with.
-Mike
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