How to open a port on Cisco?

Question

Cisco

Hello.
Tell me how to open / close / open from the desired IP on the Cisco 1900
Close:
access-list 100
deny udp any any port XXXX
Open:
access-list 100
permit udp any any
Open from a specific IP:
I don’t know how to write here
Please tell me where the errors are , because cat in working order and downtime will cost me nerves

Answer 1

Help by sign "?" output.
permit protocol host source host destination eq port.

Answer 2

https://m.habrahabr.ru/post/147996/
Read here, everything is detailed and clear