Scott, If I've understood you correctly, the comcast device is doing dhcp for all of the computers on the network, but the computers are actually connecting through the airport; you're wanting to make the comcast box act just as a modem and nothing else because of the airports ip reservation features? You're also having problems with the 2 nats and setting up vpn? I *think* the first problem would be quite easy to sort out. I'd start by turning dhcp off on the comcast box and just make the airport do it for the comcast box and all the other devices on the network; this should give you back the control that you don't have on the comcast box. As far as port forwarding through 2 nats, can both the comcast and airport do port forwarding? If so, assuming that every ip is static, have you tried forwarding the ports on the airport and then forwarding the ports on the comcast box so that when someone connects from the outside on the desired port, the chain would look like: some outside computer > the internet > your isp > comcast set to port forward to the airport > airport set to port forward to the machine?
Probably completely miss understood you, but hth. On 10/07/2011, Geoff Shang <[email protected]> wrote: > On Sun, 10 Jul 2011, Scott Howell wrote: > >> Here is the situation. I recently switched to Comcast business class. I >> was provided with a SMC Network cable modem. THis box is actually a >> switch consisting of four ports. Currently I have my AirPort router >> plugged into the SMC and thus I have a double nat situation. THe SMC is >> configured to handout DHCP addresses, which is how my AirPort gets its >> address, but I also am handing out addresses using DHCP to the devices >> on my private network. I actually am using DHCP reservations and for a >> specific reason. > > The best thing to do if you can is bridge the SMC and let the airport deal > with everything. Now, I don't know anything about airport routers, so I > don't know if they know anything about PPPoE/PPPoA, etc. So I don't know > if this would work. But it's the optimal solution for this situation. > > Usually, the best way to connect two routers together is to use LAN ports > on both of them. But this works better when it's the one which talks to > the world which should control everything. I recently set this up - I > connected two 4-port routers together which got me two more ports. > > Geoff. > > -- > You received this message because you are subscribed to the Google Groups > "MacVisionaries" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/macvisionaries?hl=en. > > -- You received this message because you are subscribed to the Google Groups "MacVisionaries" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/macvisionaries?hl=en.
