Expand the CAVEAT section to more fully describe the behaviour of

the -uz combination.

This diff stems from a diff by brynet@ sent to tech@

help from jmc@ regarding wording.

1 files changed, 13 insertions, 6 deletions

diff --git a/src/usr.bin/nc/nc.1 b/src/usr.bin/nc/nc.1
index d249aa18b1..75d1437580 100644
--- a/src/usr.bin/nc/nc.1
+++ b/src/usr.bin/nc/nc.1
@@ -1,4 +1,4 @@
-.\"     $OpenBSD: nc.1,v 1.59 2011/10/04 08:34:34 fgsch Exp $
+.\"     $OpenBSD: nc.1,v 1.60 2012/02/07 12:11:43 lum Exp $
 .\"
 .\" Copyright (c) 1996 David Sacerdote
 .\" All rights reserved.
@@ -25,7 +25,7 @@
 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd $Mdocdate: October 4 2011 $
+.Dd $Mdocdate: February 7 2012 $
 .Dt NC 1
 .Os
 .Sh NAME
@@ -449,8 +449,15 @@ Original implementation by *Hobbit*
 Rewritten with IPv6 support by
 .An Eric Jackson Aq ericj@monkey.org .
 .Sh CAVEATS
-UDP port scans will always succeed
-(i.e. report the port as open),
-rendering the
+UDP port scans using the
 .Fl uz
-combination of flags relatively useless.
+combination of flags will always report success irrespective of
+the target machine's state.
+However,
+in conjunction with a traffic sniffer either on the target machine
+or an intermediary device,
+the
+.Fl uz
+combination could be useful for communications diagnostics.
+Note that the amount of UDP traffic generated may be limited either
+due to hardware resources and/or configuration settings.