Hi Mahesh,
Essentially the "inactive" means that the rule is configured on the ASA but its disabled and isnt used.
This is for example situation where you dont want to remove the ACL rule but just want to temporarily disable it.
The rule being greyed out in the ASDM means the same. Its present in the configurations but is disabled so the ASA should consider this rule when traffic is coming through the ASA.
I have not really configured any ACL rules as "inactive" myself. I tend to remove them completely and re-enter something if there is a need.
Here is the explanation of the parameter "inactive" from the ASA Command Reference
inactive (Optional) Disables an ACE. To reenable it, enter the entire ACE without
the inactive keyword. This feature lets you keep a record of an inactive
ACE in your configuration to make reenabling easier.
- Jouni
