Strange errors with nmap 4.68

[Nathan <nathan.stocks () gmail com>]

> From my server[1] that I'm running nmap[2] on I'm seeing lots of error
messages like the one below.  Can someone help me understand what's
going on?  If this error is harmless, then I'll ignore it, but if not
then I'd like to fix the problem on my server that's causing these
errors.  The task I'm trying to achieve is to periodically scan all
the tcp ports on a bunch of servers to make sure new services don't
get opened, and the amount of servers has increased lately, which may
or may not be part of the cause of the error.  I've tried googling the
error, but that's just turned up a bunch of posts of nmap output that
happen to contain the error, but the posts are discussing something
else unrelated to the error.

----
sendto in send_ip_packet: sendto(6, packet, 44, 0, A.B.C.D, 16) =>
Operation not permitted
Offending packet: TCP X.Y.Z.Z:57622 > A.B.C.D:36343 S ttl=38 id=64350
iplen=44  seq=3884235946 win=3072 <mss 1460>
----

[1] Linux myhostname 2.6.23-gentoo-r9 #2 SMP Wed Jul 9 14:34:31 MDT
2008 i686 Intel(R) Xeon(R) CPU X5355 @ 2.66GHz GenuineIntel GNU/Linux

[2] /usr/bin/nmap -sS -sV -T4 -p 1-65535 -oG myoutputfile -oX - -P0 A.B.C.D

~ Nathan

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