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Setting up UTM9 with AT&T U-Verse

I'm trying to setup Sophos UTM 9.4 on a QOTOM J1900 Mini-PC with dual NICs in conjunction with AT&T U-verse DSL.

I have a PACE 2Wire 5031NV series modem in DMZplus mode which simulates a bridged mode. I also have a Netgear WNDR3700 wifi router configured with my DSL authentication information, and these devices have been working solid for the past couple of years. The 2Wire modem passes the DSL dynamic IP address to the Netgear which handles all the layer 3 & layer 4 traffic for me.

My intention is to insert the new UTM firewall in place of the Netgear WNDR3700 , and have it become my new router. I will then reconfigure my Netgear to be simply a layer 2 device on the internal network.

Goal is:

PACE 2Wire 5031NV (Simulate bridged mode) ------ Sophos UTM9.4 (acting as router & FW) ----------- Netgear WNDR3700 (Layer 2 WAP)

Unfortunately, I cannot seem to figure out how to make this work. I have completely reset the 2Wire modem, and have selected the Sophos UTM9.4 device as the primary unit in DMZplus. I have configured the ethernet port on the Sophos UTM to use PPPOE, and have entered my credentials, but when in PPPOE mode, it shows my ethernet link as down. If I switch the NIC to use standard ethernet, rather than PPPOE, it does get my external IP Address passed to it from the 2Wire modem, and does show a link status of Up.

Obviously when set to standard ethernet, it does not authenticate me on AT&T's network, so I have no internet. I have tried this multiple times, and cannot figure out what else to do. I have completely reset the modem at least four times. I have reinstalled Sophos UTM9.4 three times. I have setup Sophos to use Ethernet 0 for U-Verse and also tried Ethernet 1 for U-Verse. I have tried MTU sizes od 1500, 1492, and 1468, all with no success.

The netgear WNDR3700 has been completely removed from the network during this time, and will not be reintroduced until I can get the UTM9.4 up and running stable for a few days.

Any help or guidance would be greatly appreciated!

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0 Stephen Dyer over 7 years ago

Is there anyone out there using AT&T U-verse with UTM9?

If so, are you able to have the UTM9 receive your public facing IP address, and have it perform your routing?

Please just let me know if this is even possible. Thank you.
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0 Eric Lawson over 7 years ago in reply to Stephen Dyer

I used the instructions found here for setting up the Uverse modem: https://community.ubnt.com/t5/EdgeMAX/Getting-static-IPs-working-with-Uverse-Pace-modem-and-EdgeRouter/td-p/1462249
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0 Eric Lawson over 7 years ago in reply to Stephen Dyer

I used the instructions found here for setting up the Uverse modem: https://community.ubnt.com/t5/EdgeMAX/Getting-static-IPs-working-with-Uverse-Pace-modem-and-EdgeRouter/td-p/1462249
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0 Stephen Dyer over 7 years ago in reply to Eric Lawson

Eric, thanks for your response. Unfortunately the PACE 5268 must have a completely different interface than my 5031NV does. The closest thing to a "secondary network" option is the DMZplus mode which I have already been trying to use. I also do not have a static address from AT&T.

Crazy part is that when I set the modem to use DMZplus, it does pass my external IP of 107.195.x.x to my UTM9 device when I have the UTM9 WAN set to normal ethernet. The UTM9 device actually shows this external address next to the WAN ethernet interface, but I do not get internet access since there is no authentication on AT&T's network occurring. When I switch the WAN interface of the UTM9 device to PPPOE, the link always shows as down.
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