Further reading
The following links are recommended for additional reading:
- Configuring IP access lists: https://www.cisco.com/c/en/us/support/docs/security/ios-firewall/23602-confaccesslists.html
- Commonly used IP ACLs: https://www.cisco.com/c/en/us/support/docs/ip/access-lists/26448-ACLsamples.html
- Access list commands: https://www.cisco.com/c/en/us/td/docs/routers/asr9000/software/asr9k_r4-0/addr_serv/command/reference/ir40asrbook_chapter1.html