I have Network A connected to Router A, Network B connected to Router B, Router A and Router B are connected so that Network A & B can communicate. There is no defined any ACLs. My question is: What is the default port status of SMTP/FTP/TELNET in both router? Is it Open/Permit or Closed/Deny? Is defined ACLs will take effect even you don’t apply it to any port of the router?
