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I was under the impression the older WatchGuard devices had PPPoA support along side PPPoE, if they have dropped support that's a little shitty as we still have ISP's that rely on PPPoA at least here in the UK.

 

You can use the modem to perform the PPPoA connection and route traffic 1:1 to a WatchGuard device IP but this goes in to the 'double NAT' scenario which is best avoided as the firewall would have an Internal IP (ideally one on a different range to your local subnet).  This would depend entirely on the capability of the PPPoA modem to have this in the configuration, I know the HG612 from Huawei/BT which is a adsl/adsl2/vdsl capable modem can do this with a custom firmware.  I do something similar using pfSense instead of WatchGuard.

 

It would look a little something like this (crude example)

ISP > PPPoA Modem (External IP) > 1:1 NAT > WatchGuard (Internal IP) > Internal Subnet (Alternate Internal IP subnet(s)/range(s)

This can certainly be done and it would forward all traffic from the external IP via 1:1 NAT'ing to the internal IP of the WatchGuard device.  How the WG device handles this would depend on your requirements as terminating VPN's directly on the WG may be a problem.

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Just curious, what makes them think the Watchguard T10-D is so good as to not want to replace it with a more feature compliant device for your ISP?

 

Other than that I don't really have much to add compared to the last time we talked about this, still don't see what's wrong with using a Vigor 120 or a Cisco SMB router in bridge mode or route mode and not doing NAT on the firewall.

 

Maybe @Wombo can come up with something, doesn't look like he's logged in since Sept 13 but maybe he'll show up.

 

Edit: Also T10-D is supposed to be the DSL variant, shouldn't this natively support PPPoA?

 

Quote

Firebox T10-D supports all VDSL2 profiles (8a, 8b, 8c, 8d, 12a, 12b, 17a, 30a) and all ADSL standards (ADSL1/2/2+).

 

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