Can not use Syn-scan or any root scan with MacOSX 10.4.11, Nmap 4.76

[Myshkin LeVine <myshlev () verizon net>]

Hello All,
             I am using Nmap v4.76 on MacOSX 10.4.11. I searched the  
mailing-list archives and found several reports of my kind of  
problem, but did not find any solution. When running nmap I cannot  
use the Syn-scan nor run any scan as root. When I try the Syn-scan I  
get an error message: "WARNING: Unable to find appropriate interface  
for system route to 10.5.67.1" That address is my router/DSL modem. I  
can however run scans as root when scanning localhost.
            After reading all the related posts I see that  
troubleshooters will ask for the output of both nmap --iflist &  
ifconfig -a. I have seen other posters offer also the output of  
netstat -rn so below is the output of all 3 of those commands:

myshlevs-computer:~ myshlev$ nmap --iflist

Starting Nmap 4.76 ( http://nmap.org ) at 2008-11-28 23:43 EST
************************INTERFACES************************
DEV  (SHORT) IP/MASK            TYPE        UP MAC
lo0  (lo0)   127.0.0.1/8        loopback    up
ppp0 (ppp0)  141.153.157.101/16 point2point up

WARNING: Unable to find appropriate interface for system route to  
10.5.67.1
WARNING: Unable to find appropriate interface for system route to  
10.5.67.1
WARNING: Unable to find appropriate interface for system route to  
10.5.67.1
WARNING: Unable to find appropriate interface for system route to  
10.5.67.1
WARNING: Unable to find appropriate interface for system route to  
10.5.67.1
WARNING: Unable to find appropriate interface for system route to  
10.5.67.1
WARNING: Unable to find appropriate interface for system route to  
10.5.67.1
WARNING: Unable to find appropriate interface for system route to  
10.5.67.1
**************************ROUTES**************************
DST/MASK     DEV  GATEWAY
10.5.67.1/32 ppp0 141.153.157.101
127.0.0.1/32 lo0  127.0.0.1
127.0.0.0/8  lo0  127.0.0.1

myshlevs-computer:~ myshlev$
myshlevs-computer:~ myshlev$
myshlevs-computer:~ myshlev$
myshlevs-computer:~ myshlev$
myshlevs-computer:~ myshlev$ ifconfig -a
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
        inet 127.0.0.1 netmask 0xff000000
        inet6 ::1 prefixlen 128
        inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1
gif0: flags=8010<POINTOPOINT,MULTICAST> mtu 1280
stf0: flags=0<> mtu 1280
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        ether 00:0a:95:cf:ea:c0
        media: autoselect (100baseTX <full-duplex>) status: active
        supported media: none autoselect 10baseT/UTP <half-duplex>  
10baseT/UTP <full-duplex> 10baseT/UTP <full-duplex,hw-loopback>  
100baseTX <half-duplex> 100baseTX <full-duplex> 100baseTX <full- 
duplex,hw-loopback> 1000baseT <full-duplex> 1000baseT <full-duplex,hw- 
loopback> 1000baseT <full-duplex,flow-control> 1000baseT <full- 
duplex,flow-control,hw-loopback>
en1: flags=8822<BROADCAST,SMART,SIMPLEX,MULTICAST> mtu 1500
        ether 00:0d:93:7d:b9:df
        media: autoselect (<unknown type>) status: inactive
        supported media: autoselect
fw0: flags=8822<BROADCAST,SMART,SIMPLEX,MULTICAST> mtu 4078
        lladdr 00:0a:95:ff:fe:cf:ea:c0
        media: autoselect <full-duplex> status: inactive
        supported media: autoselect <full-duplex>
ppp0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1492
        inet 141.153.157.101 --> 10.5.67.1 netmask 0xffff0000
myshlevs-computer:~ myshlev$
myshlevs-computer:~ myshlev$
myshlevs-computer:~ myshlev$
myshlevs-computer:~ myshlev$
myshlevs-computer:~ myshlev$ netstat -rn
Routing tables

Internet:
Destination        Gateway            Flags    Refs      Use  Netif  
Expire
default            10.5.67.1          UGSc        7       16   ppp0
10.5.67.1          141.153.157.101    UH          8        0   ppp0
127                127.0.0.1          UCS         0        0    lo0
127.0.0.1          127.0.0.1          UH          9   239717    lo0
141.153            ppp0               USc         0        0   ppp0

Internet6:
Destination                              
Gateway                         Flags      Netif Expire
::1                                      
link#1                          UHL         lo0
fe80::%lo0/64                           fe80::1% 
lo0                     Uc          lo0
fe80::1%lo0                              
link#1                          UHL         lo0
ff01::/32                               :: 
1                             U           lo0
ff02::/32                               :: 
1                             UC          lo0
myshlevs-computer:~ myshlev$

What can I do about this? I would be happy to provide any additional  
information.
                        Take care,
                                  Myshkin LeVine


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