MN-500 port, isp, or security problem?

I have been using a MN-500 for about 1 1/2 years without
problems. This past week, I have been getting
intermittent connection problems. When I look at the MN-
500, the Modem light was not on. The DSL modem's LAN
connection light was blinking, but the ADL light that
indicates an Internet connection was solid on. When I
disconnected the cable from the MN-500 and connected the
modem directly to my PC, the LAN light on the modem
stayed solid. So I thought that maybe the MN-500 port
had died. During this week though, the same problem has
been occurring on a daily basis. This made me think that
the problem lies elsewhere. I have tried resetting the
modem, base station, all cables checked, and everything
else I could think of. I have run out of options to try,
and the problem is still happening, any help would be
appreciated. Below is a copy of part the event log from
two different events when the problem happened.

LOG #1

2004/11/10 12:45:00 Connection attempt to base station
from WAN blocked -- src:<68.164.155.182:4541>
dst:<68.164.224.41:445>
2004/11/10 12:45:03 Connection attempt to base station
from WAN blocked -- src:<68.164.155.182:4541>
dst:<68.164.224.41:445>
2004/11/10 12:47:08 Connection attempt to base station
from WAN blocked -- src:<68.164.235.13:3664>
dst:<68.164.224.41:445>
2004/11/10 12:47:11 Connection attempt to base station
from WAN blocked -- src:<68.164.235.13:3664>
dst:<68.164.224.41:445>
2004/11/10 12:49:05 Connection attempt to base station
from WAN blocked -- src:<68.164.236.10:3917>
dst:<68.164.224.41:135>
2004/11/10 12:49:08 Connection attempt to base station
from WAN blocked -- src:<68.164.236.10:3917>
dst:<68.164.224.41:135>
2004/11/10 12:50:08 AddPortMapping: ExternalPort:61176,
UDP, InternalPort:14945, InternalClient:192.168.2.39
2004/11/10 12:50:08 AddPortMapping: ExternalPort:24556,
TCP, InternalPort:11984, InternalClient:192.168.2.39
2004/11/10 12:50:08 DeletePortMapping:
ExternalPort:24556, TCP
2004/11/10 12:50:08 DeletePortMapping:
ExternalPort:61176, UDP
2004/11/10 12:50:41 PPPoE send PADI
2004/11/10 12:50:44 PPPoE send PADI
2004/11/10 12:50:47 PPPoE send PADI
2004/11/10 12:50:50 PPPoE send PADI
2004/11/10 12:50:53 Requested PPPoE service unavailable
2004/11/10 12:50:53 PPPoE send PADI
2004/11/10 12:50:55 PPPoE send PADI

LOG #2

2004/11/11 22:11:18 Connection attempt to base station
from WAN blocked -- src:<210.213.181.225:3691>
dst:<68.164.1.143:445>
2004/11/11 22:11:18 Connection attempt to base station
from WAN blocked -- src:<68.164.192.24:3954>
dst:<68.164.1.143:445>
2004/11/11 22:11:22 Connection attempt to base station
from WAN blocked -- src:<68.164.192.24:3954>
dst:<68.164.1.143:445>
2004/11/11 22:11:24 Connection attempt to base station
from WAN blocked -- src:<210.213.181.225:3691>
dst:<68.164.1.143:445>
2004/11/11 22:11:36 Connection attempt to base station
from WAN blocked -- src:<68.164.133.100:3158>
dst:<68.164.1.143:135>
2004/11/11 22:11:39 Connection attempt to base station
from WAN blocked -- src:<68.164.133.100:3158>
dst:<68.164.1.143:135>
2004/11/11 22:12:17 Connection attempt to base station
from WAN blocked -- src:<68.164.150.203:4856>
dst:<68.164.1.143:135>
2004/11/11 22:12:20 Connection attempt to base station
from WAN blocked -- src:<68.164.150.203:4856>
dst:<68.164.1.143:135>
2004/11/11 22:12:35 Connection attempt to base station
from WAN blocked -- src:<61.149.94.198:64454>
dst:<68.164.1.143:137>
2004/11/11 22:14:43 192.168.2.39 login successful