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Document the net.inet.ip.portrange.reserved{high,low} sysctl knobs

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added in sys/netinet/in_pcb.c 1.120.

Prodded by:	ru
This commit is contained in:
Crist J. Clark 2003-02-21 21:09:35 +00:00
parent d27daa276e
commit 718b17bb6a
1 changed files with 18 additions and 0 deletions
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18
share/man/man4/ip.4
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@ -202,6 +202,24 @@ This is adjustable through the sysctl setting:
and
.Sy net.inet.ip.portrange.lowlast .
.El
.Pp
The range of privileged ports which only may be opened by
root-owned processes may be modified by the
.Sy net.inet.ip.portrange.reservedlow
and
.Sy net.inet.ip.portrange.reservedhigh
sysctl settings.
The values default to the traditional range,
0 through
.Dv IPPORT_RESERVED - 1
(0 through 1023), respectively.
Note that these settings do not affect and are not accounted for in the
use or calculation of the other
.Sy net.inet.ip.portrange
values above.
Changing these values departs from Unix tradition and has security
concequences that the administrator should carefully evaluate before
modifying these settings.
.Ss "Multicast Options"
.Pp
.Tn IP