Our Cisco 2921 is blocking an specific UDP port outbound. The 2921 has the firewall enabled. So far I'm stumped - I've added an ACL to allow the traffic, created a user defined service and added that ...

I'm having a problem with Cisco ACL's and DHCP. Whenever I turn on the ACL, the clients are unable to obtain DHCP IP addresses. I have a Cisco 7206 router with a T1 to a Cisco 2651 Router. The 2651 ...

David Davis shows you how to view ACL statistics and, with the help of a new feature in the Cisco IOS, how you can view these usage statistics per interface and per direction. As soon as you start ...

Why you need to know Cisco IOS ACL port numbers Your email has been sent What’s a port number? What does this have to do with the Cisco IOS? When do I need to know a port number? Summary When working ...