ACLs Filtering Locally Generated Traffic
ACLs filter incoming or transient traffic. They do not filter any traffic that is generated by the local router:
If you want to filter traffic that is generated by the router, it's best to use Control Plane Policing (CoPP) (CoPP).
Links:
https://forum.networklessons.com/t/standard-access-list-example-on-cisco-router/889/70?u=lagapidis
https://forum.networklessons.com/t/standard-access-list-example-on-cisco-router/889/22?u=lagapides