nmap 5.21, OS X 10.6.2 - doesn't work as root

["Daniel" <dt () 7oo7 net>]

Hi,

An old problem - I can run nmap as a plain ol' user:

================

[dt@localhost:~]$ nmap  -n -vvv -PN  10.0.1.7

Starting Nmap 5.21 ( http://nmap.org ) at 2010-03-29 09:20 EDT
Initiating Connect Scan at 09:20
Scanning 10.0.1.7 [1000 ports]
Discovered open port 135/tcp on 10.0.1.7
Discovered open port 139/tcp on 10.0.1.7
Discovered open port 445/tcp on 10.0.1.7
Completed Connect Scan at 09:20, 1.14s elapsed (1000 total ports)
Nmap scan report for 10.0.1.7
Host is up (0.00057s latency).
Scanned at 2010-03-29 09:20:17 EDT for 1s
Not shown: 997 closed ports
PORT    STATE SERVICE
135/tcp open  msrpc
139/tcp open  netbios-ssn
445/tcp open  microsoft-ds

Read data files from: /usr/local/share/nmap
Nmap done: 1 IP address (1 host up) scanned in 1.22 seconds

================

but not as root:

================

[dt@localhost:~]$ sudo nmap  -n -vvv -PN  10.0.1.7

Starting Nmap 5.21 ( http://nmap.org ) at 2010-03-29 09:21 EDT
Initiating ARP Ping Scan at 09:21
Scanning 10.0.1.7 [1 port]
Completed ARP Ping Scan at 09:21, 0.21s elapsed (1 total hosts)
Nmap scan report for 10.0.1.7 [host down]
Read data files from: /usr/local/share/nmap
Nmap done: 1 IP address (0 hosts up) scanned in 0.29 seconds
           Raw packets sent: 2 (84B) | Rcvd: 0 (0B)

================


I did a little research on this, and found a few other user's questions
about it, the most recent from 11/2009 where the user was told to
upgrade to 5.10BETA1, but I'm on 5.21 and it's still not working
properly - unless I'm doing something wrong.

I tried both building from src and installing from the Mac OS X binary
(.dmg) distribution.

Running OSX 10.6.2
Hardware:
  Model Name:     MacBook Pro
  Model Identifier:       MacBookPro5,1
  Processor Name: Intel Core 2 Duo
  Processor Speed:        2.8 GHz
  Number Of Processors:   1
  Total Number Of Cores:  2
  L2 Cache:       6 MB
  Memory: 4 GB
  Bus Speed:      1.07 GHz
  Boot ROM Version:       MBP51.007E.B05
  SMC Version (system):   1.33f8

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