[en] nmap on a multihomed machine with "Linux advanced routing" -> fail

# nmap -sS scanme.insecure.org

Starting Nmap 5.21 ( http://nmap.org ) at 2010-06-19 18:34 CEST
nexthost: failed to determine route to scanme.insecure.org (64.13.134.52)
QUITTING!
# nmap -sT scanme.insecure.org

Starting Nmap 5.21 ( http://nmap.org ) at 2010-06-19 18:34 CEST
nexthost: failed to determine route to scanme.insecure.org (64.13.134.52)
QUITTING!
# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.4.2 0.0.0.0 255.255.255.255 UH 0 0 0 tun0
192.168.4.0 192.168.4.2 255.255.255.0 UG 0 0 0 tun0
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth2
192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1
81.57.108.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo
#