Using the files from https://github.com/jaysoffian/eap_proxy these are the instructions to get a fully functional bypass using a EdgeRouter Lite and AT&T router.
Searching multiple places I could only find snippets and partial code. After piecing these together I got a working config.
Kudos to https://www.reddit.com/user/SScorpio/ that provided most if not all of the script from https://www.reddit.com/r/uverse/comments/9ii4t5/eli5_how_to_use_eaproxy_and_att_uverse/e9fbtoa?utm_source=share&utm_medium=web2x
I've used this only with a EdgeRouter Lite (ERL), but probably would work with most EdgeOS routers.
This guide configures the ERL ports with the following:
eth0 = WAN (the connection from the ONT)
eth1 = AT&T Router
eth2 = LAN
Record the MAC address of your AT&T router, this is needed in section 4
Factory reset your AT&T router (optional)
It's a good idea to also disable the WiFi on the AT&T router (optional)
Install WinSCP - To transfer files
Install Putty - To configure the router
From a factory reset ERL
Plug in a computer to eth0
Set IP of computer to 192.168.1.100, 255.255.255.0, 192.168.1.1 - How to: Change IP address in Windows
Login to the ERL EdgeOS by going to https://192.168.1.1 in your browser
Backup config of the ERL (System > Back Up Config) - Old firmware
Check www.ubnt.com/download to see if there is an updated firmware, download (if desired)
Upgrade firmware of device (if desired) (System > Upgrade System Image)
Backup config of the ERL (System > Back Up Config) - New firmware
Downloaded eap-proxy files from: https://github.com/jaysoffian/eap_proxy
Connect to ERL using WinSCP (IP address for the ERL is 192.168.1.1)
Copy using binary mode eap_proxy.sh to /config/scripts/post-config.d/
Copy using binary mode eap_proxy.py to /config/scripts/
Edit the eap_proxy.sh file that as just uploaded in WinSCP (Go to /config/scripts/post-config.d > Right-click on file > Edit)
Change the options as such (by default IF_ROUTER is set to eth2):
IF_WAN=eth0
IF_ROUTER=eth1
Connect to ERL with Putty
Change permissions of files for execution using the following commands
sudo chmod +x /config/scripts/post-config.d/eap_proxy.sh
sudo chmod +x /config/scripts/eap_proxy.py
Configure router using the below, this will setup the firewall, all interfaces and give you working IPv6
I typically run these sections in batches then type in "save;commit" as shown below. It's easier to troubleshoot if anything went wrong.
Remember to replace aa:bb:cc:dd:ee:ff in this line of the configuration section to reflect the mac address of your AT&T Router
set interfaces ethernet eth0 vif 0 mac 'aa:bb:cc:dd:ee:ff'
In Putty, type "configure" then Enter to get into the configure prompt
Then, copy & paste the following:
set firewall all-ping enable
set firewall broadcast-ping disable
set firewall ipv6-name IPv6_WAN_IN default-action drop
set firewall ipv6-name IPv6_WAN_IN description 'IPv6 packets from the Internet to LAN'
set firewall ipv6-name IPv6_WAN_IN rule 1 action accept
set firewall ipv6-name IPv6_WAN_IN rule 1 description 'Allow established sessions'
set firewall ipv6-name IPv6_WAN_IN rule 1 state established enable
set firewall ipv6-name IPv6_WAN_IN rule 1 state invalid disable
set firewall ipv6-name IPv6_WAN_IN rule 1 state new disable
set firewall ipv6-name IPv6_WAN_IN rule 1 state related enable
set firewall ipv6-name IPv6_WAN_IN rule 2 action drop
set firewall ipv6-name IPv6_WAN_IN rule 2 state established disable
set firewall ipv6-name IPv6_WAN_IN rule 2 state invalid enable
set firewall ipv6-name IPv6_WAN_IN rule 2 state new disable
set firewall ipv6-name IPv6_WAN_IN rule 2 state related disable
set firewall ipv6-name IPv6_WAN_IN rule 5 action accept
set firewall ipv6-name IPv6_WAN_IN rule 5 description 'Allow ICMPv6'
set firewall ipv6-name IPv6_WAN_IN rule 5 log disable
set firewall ipv6-name IPv6_WAN_IN rule 5 protocol icmpv6
save;commit
set firewall ipv6-name IPv6_WAN_LOCAL default-action drop
set firewall ipv6-name IPv6_WAN_LOCAL description 'IPv6 packets from the Internet to the router'
set firewall ipv6-name IPv6_WAN_LOCAL rule 10 action accept
set firewall ipv6-name IPv6_WAN_LOCAL rule 10 description 'Allow established sessions'
set firewall ipv6-name IPv6_WAN_LOCAL rule 10 log disable
set firewall ipv6-name IPv6_WAN_LOCAL rule 10 state established enable
set firewall ipv6-name IPv6_WAN_LOCAL rule 10 state invalid disable
set firewall ipv6-name IPv6_WAN_LOCAL rule 10 state new disable
set firewall ipv6-name IPv6_WAN_LOCAL rule 10 state related enable
set firewall ipv6-name IPv6_WAN_LOCAL rule 20 action drop
set firewall ipv6-name IPv6_WAN_LOCAL rule 20 description 'Drop invalid state'
set firewall ipv6-name IPv6_WAN_LOCAL rule 20 log disable
set firewall ipv6-name IPv6_WAN_LOCAL rule 20 state established disable
set firewall ipv6-name IPv6_WAN_LOCAL rule 20 state invalid enable
set firewall ipv6-name IPv6_WAN_LOCAL rule 20 state new disable
set firewall ipv6-name IPv6_WAN_LOCAL rule 20 state related disable
set firewall ipv6-name IPv6_WAN_LOCAL rule 50 action accept
set firewall ipv6-name IPv6_WAN_LOCAL rule 50 description 'Allow ICMPv6'
set firewall ipv6-name IPv6_WAN_LOCAL rule 50 log disable
set firewall ipv6-name IPv6_WAN_LOCAL rule 50 protocol icmpv6
set firewall ipv6-name IPv6_WAN_LOCAL rule 60 action accept
set firewall ipv6-name IPv6_WAN_LOCAL rule 60 description 'Allow DHCPv6'
set firewall ipv6-name IPv6_WAN_LOCAL rule 60 destination port 546
set firewall ipv6-name IPv6_WAN_LOCAL rule 60 protocol udp
set firewall ipv6-name IPv6_WAN_LOCAL rule 60 source port 547
save;commit
set firewall ipv6-receive-redirects disable
set firewall ipv6-src-route disable
set firewall ip-src-route disable
set firewall log-martians enable
save;commit
set firewall name WAN_IN default-action drop
set firewall name WAN_IN description 'WAN to internal'
set firewall name WAN_IN rule 10 action accept
set firewall name WAN_IN rule 10 description 'Allow established/related'
set firewall name WAN_IN rule 10 state established enable
set firewall name WAN_IN rule 10 state related enable
set firewall name WAN_IN rule 20 action drop
set firewall name WAN_IN rule 20 description 'Drop invalid state'
set firewall name WAN_IN rule 20 state invalid enable
save;commit
set firewall name WAN_LOCAL default-action drop
set firewall name WAN_LOCAL description 'WAN to router'
set firewall name WAN_LOCAL rule 10 action accept
set firewall name WAN_LOCAL rule 10 description 'Allow established/related'
set firewall name WAN_LOCAL rule 10 state established enable
set firewall name WAN_LOCAL rule 10 state related enable
set firewall name WAN_LOCAL rule 50 action drop
set firewall name WAN_LOCAL rule 50 description 'Drop invalid state'
set firewall name WAN_LOCAL rule 50 state invalid enable
save;commit
set firewall receive-redirects disable
set firewall send-redirects enable
set firewall source-validation disable
set firewall syn-cookies enable
save;commit
set interfaces ethernet eth0 description WAN
set interfaces ethernet eth0 duplex auto
set interfaces ethernet eth0 firewall in ipv6-name IPv6_WAN_IN
set interfaces ethernet eth0 firewall in name WAN_IN
set interfaces ethernet eth0 firewall local ipv6-name IPv6_WAN_LOCAL
set interfaces ethernet eth0 firewall local name WAN_LOCAL
set interfaces ethernet eth0 speed auto
save;commit
set interfaces ethernet eth0 vif 0 address dhcp
set interfaces ethernet eth0 vif 0 description 'WAN VLAN 0'
set interfaces ethernet eth0 vif 0 dhcp-options default-route update
set interfaces ethernet eth0 vif 0 dhcp-options default-route-distance 210
set interfaces ethernet eth0 vif 0 dhcp-options name-server update
set interfaces ethernet eth0 vif 0 dhcpv6-pd pd 0 interface switch0 host-address '::1'
set interfaces ethernet eth0 vif 0 dhcpv6-pd pd 0 interface switch0 prefix-id 1
set interfaces ethernet eth0 vif 0 dhcpv6-pd pd 0 interface switch0 service slaac
set interfaces ethernet eth0 vif 0 dhcpv6-pd pd 0 prefix-length /60
set interfaces ethernet eth0 vif 0 dhcpv6-pd rapid-commit enable
set interfaces ethernet eth0 vif 0 firewall in ipv6-name IPv6_WAN_IN
set interfaces ethernet eth0 vif 0 firewall in name WAN_IN
set interfaces ethernet eth0 vif 0 firewall local ipv6-name IPv6_WAN_LOCAL
set interfaces ethernet eth0 vif 0 firewall local name WAN_LOCAL
set interfaces ethernet eth0 vif 0 mac 'aa:bb:cc:dd:ee:ff'
save;commit
set interfaces ethernet eth1 description 'AT&T Router'
set interfaces ethernet eth1 duplex auto
set interfaces ethernet eth1 speed auto
save;commit
set interfaces ethernet eth2 address 192.168.2.254/24
set interfaces ethernet eth2 description LAN
set interfaces ethernet eth2 ipv6 dup-addr-detect-transmits 1
set interfaces ethernet eth2 ipv6 router-advert cur-hop-limit 64
set interfaces ethernet eth2 ipv6 router-advert link-mtu 0
set interfaces ethernet eth2 ipv6 router-advert managed-flag false
set interfaces ethernet eth2 ipv6 router-advert max-interval 600
set interfaces ethernet eth2 ipv6 router-advert other-config-flag false
set interfaces ethernet eth2 ipv6 router-advert prefix '::/64' autonomous-flag true
set interfaces ethernet eth2 ipv6 router-advert prefix '::/64' on-link-flag true
set interfaces ethernet eth2 ipv6 router-advert prefix '::/64' valid-lifetime 2592000
set interfaces ethernet eth2 ipv6 router-advert reachable-time 0
set interfaces ethernet eth2 ipv6 router-advert retrans-timer 0
set interfaces ethernet eth2 ipv6 router-advert send-advert true
set interfaces ethernet eth2 mtu 1500
set interfaces ethernet eth0 speed auto
set interfaces loopback lo
save;commit
set port-forward auto-firewall enable
set port-forward hairpin-nat enable
set port-forward lan-interface eth2
set port-forward wan-interface eth0.0
save;commit
set service dhcp-server disabled false
set service dhcp-server hostfile-update enable
set service dhcp-server shared-network-name LAN2 authoritative enable
set service dhcp-server shared-network-name LAN2 subnet 192.168.2.0/24 default-router 192.168.2.254
set service dhcp-server shared-network-name LAN2 subnet 192.168.2.0/24 dns-server 192.168.2.254
set service dhcp-server shared-network-name LAN2 subnet 192.168.2.0/24 lease 86400
set service dhcp-server shared-network-name LAN2 subnet 192.168.2.0/24 start 192.168.2.5 stop 192.168.2.200
set service dhcp-server static-arp disable
set service dhcp-server use-dnsmasq disable
save;commit
set service dns forwarding cache-size 150
set service dns forwarding listen-on eth2
set service dns forwarding name-server 68.94.157.1
set service dns forwarding name-server 68.94.156.1
set service dns forwarding name-server 12.127.17.71
set service dns forwarding name-server 12.127.16.67
save;commit
set service gui http-port 80
set service gui https-port 443
set service gui older-ciphers enable
save;commit
set service nat rule 5010 description 'masquerade for WAN'
set service nat rule 5010 outbound-interface eth0.0
set service nat rule 5010 type masquerade
set service nat rule 6000 description 'MASQ all networks NTP to WAN'
set service nat rule 6000 log disable
set service nat rule 6000 outbound-interface eth2
set service nat rule 6000 outside-address port 1024-65535
set service nat rule 6000 protocol udp
set service nat rule 6000 source port 123
set service nat rule 6000 type masquerade
set system offload ipv4 vlan enable
save;commit
set service ssh port 22
set service ssh protocol-version v2
set service unms disable
save;commit
set service upnp
set service upnp2 acl rule 9000 action deny
set service upnp2 acl rule 9000 description 'Deny All'
set service upnp2 acl rule 9000 external-port 0-65535
set service upnp2 acl rule 9000 local-port 0-65535
set service upnp2 acl rule 9000 subnet 0.0.0.0/0
set service upnp2 listen-on eth2
set service upnp2 nat-pmp enable
set service upnp2 secure-mode enable
set service upnp2 wan eth0.0
save;commit
Once everything returns and committed then "exit" from the configure mode
Enter the following in putty to monitor the data:
sudo /usr/bin/python /config/scripts/eap_proxy.py eth0 eth1 --restart-dhcp --ignore-when-wan-up --ignore-logoff --ping-gateway
Plug in cable in from ONT to eth0
Plug in cable in from AT&T router to eth1
Plug in cable out to LAN from eth2
In you should see EAPOL start with a whole bunch of communication
Log into the EdgeOS (https://192.168.2.254/) to see everything setup with:
WAN (eth0) as 192.168.1.1
WAN VLAN 0 (eth0.0) with WAN IP
AT&T Router (eth1) has no IP
LAN (eth2) as 192.168.2.254
Example of what it should look like:
Good idea to backup your ERL configuration if everything is in working order.