I didnt understand the exact function of default inpsection class in ASA or fixup in PIX. ( ftp,tftp,smtp,sip etc .). Why these particular protocols are added in this class and in global policy map?
do these change ports dynamically is that the reason? What about those protocols those do not appear in this list.
It is very basic ASA conf, but still i didnt get it.
Please share the experience.
Any link on cisco.com?
Thanks in advance.