Ошибка Nmap "операция не разрешена"

Я запускаю CentOS 5.3 в контейнере openVZ и получаю сообщение об ошибке "операция не разрешена" из Nmap.

[root@test nmap-5.21]# ./nmap scanme.nmap.org

Starting Nmap 5.21 ( http://nmap.org )
at 2010-12-12 17:03 MSK

Warning: File ./nmap-services exists,
but Nmap is using
/usr/local/share/nmap/nmap-services
for security and consistency reasons. 
set NMAPDIR=. to give priority to
files in your local directory (may
affect the other data files too).

sendto in send_ip_packet: sendto(4,
packet, 28, 0, 64.13.134.52, 16) =>
Operation not permitted

Offending packet: ICMP 127.0.0.1 >
64.13.134.52 echo request (type=8/code=0) ttl=46 id=49000
iplen=28 sendto in send_ip_packet:
sendto(4, packet, 40, 0, 64.13.134.52,
16) => Operation not permitted


Offending packet: ICMP 127.0.0.1 >
64.13.134.52 Timestamp request (type=13/code=0) ttl=49 id=23010
iplen=40

sendto in send_ip_packet: sendto(4,
packet, 40, 0, 64.13.134.52, 16) =>
Operation not permitted

Offending packet: ICMP 127.0.0.1 >
64.13.134.52 Timestamp request (type=13/code=0) ttl=56 id=36657
iplen=40

sendto in send_ip_packet: sendto(4,
packet, 28, 0, 64.13.134.52, 16) =>
Operation not permitted

Offending packet: ICMP 127.0.0.1 >
64.13.134.52 echo request (type=8/code=0) ttl=51 id=43181
iplen=28

Note: Host seems down. If it is really
up, but blocking our ping probes, try
-PN Nmap done: 1 IP address (0 hosts up) scanned in 3.15 seconds

У меня нет набора правил iptables.

Как я могу заставить это работать?