Geek help: static IP addresses

[ciphergoth]

Quick geek help sought with making sure I understand IP routing properly.

Zen have allocated me the static IP address block 82.68.129.72/29. Of these eight addresses, one is the network address, one is the broadcast address.

I've fitted an ADSL card to my main PC, saltationism. So it has two interfaces: an ADSL interface and a LAN one. That's two more addresses taken. So there are four left: I can give up to four more machines on the LAN static IP addresses.

The thing that worries me is that if the subnet for the LAN is 82.68.129.72/29, then can I assign an address from that subnet to the ADSL card? If I do, will my LAN be able to route to that address? If not, what should I do instead?

Comments

[stgpcm.livejournal.com]

what is the presentation of the card on your box? ppp or eth?

if it is ppp what is the other end?

you should be able to get away with having the same address on both interfaces - assuming the linux PPP stuff isn't completely braindead.

[ciphergoth.livejournal.com]

PPP, inet addr:82.68.129.78 P-t-P:62.3.83.3. If I can give both the same address that would rock - saves an IP from my very limited stock!

I guess the other solution would be to have two subnets on the same wire, and assign the LAN interface an address from the 192.168 subnet - can the two subnets talk to each other happily?

thanks muchly! (also thanks to drreagan who raised a similar point)