two NICs and speed issues

[sam at illawarra.org]

220.x.x.x   0.0.0.0         255.255.255.255 UH    0      0        0 ppp0
192.168.1.0     0.0.0.0         255.255.255.0   U     0      0        0 eth0
192.168.0.0     0.0.0.0         255.255.255.0   U     0      0        0 eth1
169.254.0.0     0.0.0.0         255.255.0.0     U     0      0        0 eth1
0.0.0.0         220.x.x.x   0.0.0.0         UG    0      0        0 ppp0

^i get the same slowdown when i am connected to the internet or not,
iptables is only activated when i am online, so do not see how this would
be relevant.