Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Allocation starts with the first number and ends with the second number.
Note that these should not conflict with the ports used by masquerading
(although the case is handled).
-Also arbitrary choices may cause problems with some firewall packet
+Also, arbitrary choices may cause problems with some firewall packet
filters that make assumptions about the local ports in use.
First number should be at least greater than 1024,
or better, greater than 4096, to avoid clashes