Hi Guys,
I have a d-link dsl-320T with v2.2 firmware. This connect to sky connect broadband. It works fine.
I now have a draytec router with dual wan. and want to use the dsl-320 as the adsl modem
Sky gives me a dynamic address of 90.x.x.x can i setup the v2.2 to bridge/pass to the draytech the 90.x.x.x address so i can avoid double natting.
Thanks
Paul
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- Newbie
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- Joined: Mon Apr 09, 2007 11:36 am
Not at the moment. You can use Dlink's own firmware which provides Zipb - this does pass the WAN IP but still appears to use NAT internally, and cause other problems - based on my own analysis and other comments on the net i.e.:-
http://www.csc.liv.ac.uk/~greg/projects/dlink.html
The RT 2.2 firmware already has the P2P friendly NAT optimizations and should work fine with double NAT. Just use a different subnet on the draytec, ie 192.168.1.x on the 320T, 192.168.0.y on the draytec.
You probably should also put the draytec WAN IP in the DMZ of the RT2.2 to allow incoming connections.
Note some VPN routers must get the WAN IP (to embed/encrpt inside messages?), most other protocols do seem to be NAT friendly.
http://www.csc.liv.ac.uk/~greg/projects/dlink.html
The RT 2.2 firmware already has the P2P friendly NAT optimizations and should work fine with double NAT. Just use a different subnet on the draytec, ie 192.168.1.x on the 320T, 192.168.0.y on the draytec.
You probably should also put the draytec WAN IP in the DMZ of the RT2.2 to allow incoming connections.
Note some VPN routers must get the WAN IP (to embed/encrpt inside messages?), most other protocols do seem to be NAT friendly.
-
- Newbie
- Posts: 2
- Joined: Mon Apr 09, 2007 11:36 am
Thats a bummer, and thanks for the link. That sounds like what my problem was and why i opted for the firmware upgrade.
Is this something that is in the pipeline for RT software ?
Anyway i shall stick with the double nat as the RT interface is much better and may show up why Sky ip address change almost daily.
Regards
Paul
Is this something that is in the pipeline for RT software ?
Anyway i shall stick with the double nat as the RT interface is much better and may show up why Sky ip address change almost daily.
Regards
Paul
If I find a good way to do the half-bridge then I will definitely share it here! - but can't see it as a priority for the RT team when they are supporting modems with multiple Ethernet ports and wireless connections themselves (not in an upstream router).
Changing IP addresses is another issue. The way most half-bridges manage this is to use short lease times which means your main router asks to update its IP address every 30 seconds or so, which is a waste of both processors and bandwidth - there doesn't seem to be a standard way of forced dhcp update. Even NTL cable modems have this problem - to reduce dhcp traffic their IP leases are now a week so if there is a major network change customers have to forcibly release and renew the IP lease (or reboot their PC which has the same effect!).
Please do let us know how you get on with double NAT - if its OK I think I can do the WAN IP transfer, I just can't do it with no-NAT!
Changing IP addresses is another issue. The way most half-bridges manage this is to use short lease times which means your main router asks to update its IP address every 30 seconds or so, which is a waste of both processors and bandwidth - there doesn't seem to be a standard way of forced dhcp update. Even NTL cable modems have this problem - to reduce dhcp traffic their IP leases are now a week so if there is a major network change customers have to forcibly release and renew the IP lease (or reboot their PC which has the same effect!).
Please do let us know how you get on with double NAT - if its OK I think I can do the WAN IP transfer, I just can't do it with no-NAT!