OT networking (Cisco VPN) question

[jsf]

Hi everyone,

WIsh I'd seen the MythTV presentation. That's something I'm planning
on doing sometime this year.

Meanwhile... here's my issue..

I work at Columbia University in NYC.

I can reach most of the *nix boxen I need to get to via the ssh
gateway and kerberos auth.

There are some files stored on Windows Servers that I need to work on
from time to time.  They provided me a pre-configured Cisco VPN client
to run on my MacBook pro.  They provided it to me last Tuesday night.
I went from work to the climbing gym in westchester where my daughter
climbs and where they have WiFi (presumably either from optonline
cable service or Verizon DSL).  I fired up the VPN client and
everything worked... i was able to get to the servers at work i needed
to get to and everything else (browser, mail client, etc.) continued
to work fine.

Now, at home, I have Verizon FiOS and a DL 604 router.  I have a
Linksys WRTG54 connected to it bridging the DHCP server on the DL604..
basically, the Linksys is just a WiFI extension of the DL 604.. it
doesn't have a separate IP of its own (afaict) and is only providing
WiFI service.

The first time I tried to run the VPN client from home it didn't work.
 I went into the DL 604 config and set up port forwarding on the IPSec
port (udp500) for the inside IP address of the DL 604 (192.168.10.1).
now things get interesting:

If my laptop uses a static internal IP address, (say 192.168.10.107)
that i've defined, the VPN client won't  connect even if i change the
setting on the DL 604 to be 192.168.10.107.

If my laptop uses a DHCP assigned IP address (say it's 192.168.10.101)
that the DL604 assigns it, the VPN (and i have the port forwarding for
192.168.10.1) then the VPN client will connect to the VPN server BUT
nothing works!  The only things I can ping at that point are my
localhost, my DL604 and the linux boxes I also have on the network
which have static internal IP addresses.

I've tried all sorts of things which I won't go into here but
basically something that was effortless on someone else's WiFI
network, which is connected to an ISP other than Verizon FiOS is now
proving to be pretty challenging on my home WiFI network.

I know that nothing worked here until I set up the IPSec port 500
forwarding.. but at that point, all it did was enable me to login to
the VPN server at Columbia via the VPN client on my laptop.  But, if I
give my laptop a static IP, even that doesn't work. I'm lost. Any
advice, any suggestions of what to try would be greatly appreciated.

Thanks!

Joshua