Hello,

I have a dedicated FTTC line for my Polycom HDX device on a UK fibre service. It goes internet -> BT modem -> Draytek 2830 Wan 2 port -> Polycom HDX. Because no other device is going to use the connection and because the Polycom is so sensitive to any NAT, I want it to have a public IP or be under true DMZ. All of the traffic needs to go to Polycom without any NAT. I can't, however, select true DMZ on wan2, and I also can't seem to find the way to put it in bridge mode (so that I could program the public IP into the Polycom). Could anybody advise?

Thanks.

Hi - any reason that you're going via the Draytek? If you just plugged the Polycom straight into the BT Modem wouldn't that achieve what you're after?

Heya, the router is where the authentication information is stored. I need to log-in to the ISP, the Polycom doesn't have such option unfortunately. Yes, plugging it straight into the modem would be perfect for me. I need the router just to do the authentication. Literally. If that's not possible on the Draytek, do you know any routers that could do it?

I think your problem might be that as soon as you put whatever device into bridge mode, then you lose the ability to do the authentification (as it expects the device behind it to do it - in your case the Polycom) and any DMZ will involve using NAT. You could have a word with BT to see if they had any ideas, especially if they can remove the authentification requirement, but I suspect they'll not be able to help.

My only thoughts are:
1. Get BT to remove authentification requirement.
2. Get BT to allocate you further IP addresses and then run the router in "routing" mode rather than "NAT" mode. I'm not sure if the 2830 supports this, but my 2960 certainly does in PPPoE mode. That way the Wan port would take the first external IP address and the polycom the second. Static routes could then be configured to route everything from the Polycom via the router and everything that comes into the router on the second address to the polycom. I have no idea if this would work, but it sounds feasible.
3. Use IPv6 - this assumes that BT support it and all of the devices that you're tring to connect with use it - unlikely.

Hopefully some stuff to think about at least.

Ta John

Cheers John. The first thing I am going to try is to unlock the BT modem (HG612) as it can be used as a router once unlocked. This will allow me to connect the Polycom directly into modem Lan1 port. That router is much more simple and hopefully I will find some setting that works. I was reading the manual and there's something called DHCP transparent transmission which I think might do the job. I would then use modem Lan2 port for the Draytek (for wireless, etc.). If that doesn't help, I'll try one of your suggested methods. Thanks.