How to restrict access to the site by IP (cisco)?

Question

Cisco

Access to the site from the outside was opened in the cisco
ip nat inside source static tcp 192.168.50.3 80 external ip 80 extendable
How to restrict access from only 1-2 external IPs?

Answer 1

acl on the external interface
https://habr.com/en/post/121806/
permit tcp host eq http