PPPOE dialer issue on Cisco C2811

Tue Nov 29 14:23:06 UTC 2011

Hey folks
please can someone see this issue
i'm veery stuck on that:
i have a C2811 with ADSL line
created a dialer interface
assigned to a fast ethernet (fe0/0)
connected sucsessfully
nated my lan network (172.28.0.0/24)
the dialer is outside and my fe0/1 is inside
but i can access (ONLY) google services!
i guess is that a MTU issue?
if yes what should i use ?
tried 1492
1480
1500 and 1504
same hell at all.
here's my config:

    Meftah Tayeb
IT Consulting
http://www.tmvoip.com/ 
phone: +21321656139
Mobile: +213660347746

__________ Information from ESET NOD32 Antivirus, version of virus signature database 6671 (20111130) __________

The message was checked by ESET NOD32 Antivirus.

http://www.eset.com

-------------- next part --------------
A non-text attachment was scrubbed...
Name: c2800-confg
Type: application/octet-stream
Size: 2529 bytes
Desc: not available
URL: <http://mailman.nanog.org/pipermail/nanog/attachments/20111129/25738b49/attachment.obj>