[framework] Bad Characters Filtering

[Danux]

Hi friends,

Some days ago i was testing an exploit but after many attempts i
realize a bad character on my payload was being filtered by the
application, googling for the public exploit a founded the bad
characters i need to avoid but obviously is very important to know how
to debug and detect bad chars in order to tell it to msfencoder

Could you please tell me if there are some tutorials on this issue?

Thanks in Advance.

-- 
Danux, CISSP
Chief Information Security Officer
Macula Security Consulting Group
www.macula-group.com