How to Configure ASA 5505 with ATT DSL

Make sure that you connect the ethernet cable from your ATT router to the E0/0 port of the ASA 5505.

Get into global configuration mode and enter the following:

1. vpdn group ATT request dialout pppoe
2. vpdn group ATT localname xyz@att.net
3. vpdn group ATT ppp authentication pap
4. vpdn username xyz@att.net password *******
5. interface Vlan1
6. nameif inside
7. ip address x.x.x.x 255.255.255.0 >>> this is your clients ip default gateway to the internet
8. interface Vlan2
9. nameif outside
10. pppoe client vpdn group ATT
11. ip address pppoe setroute
12. interface Ethernet0/0
13. switchport access vlan 2
14. no shutdown
15. interface Ethernet0/1
16. no shutdown
    
17. interface Ethernet0/2
    no shutdown
    
18. interface Ethernet0/3
    no shutdown
    
19. interface Ethernet0/4
    no shutdown
    
20. interface Ethernet0/5
    no shutdown
    
21. interface Ethernet0/6
    no shutdown
    
22. interface Ethernet0/7
    no shutdown
    
23. exit
    
24. nat (inside) 1 0.0.0.0 0.0.0.0
    
25. global (outside) 1 interface
    
26. end
    
27. write