Hello,
You can define blocking and open ports, inbound and outbound connection defined o access groups, for further details, take a look to this link:
- http://www.cisco.com/c/en/us/support/docs/security/asa-5500-x-series-next-generation-firewalls/91970-PIXASAopenblockports.html
If you have any questions let me know,
Please don´t forget to rate and mark as correct the helpful Post!
David Castro,
Regards,