16.4.0 0.0.0.255 Source IP address and mask; the ?¬?rst three octets must match but not the last
octet
any Match any destination IP address
eq 23 or eq telnet Destination port or application; in this example, it speci?¬?es the well-known
port number for Telnet, which is 23
permit Indicates that traf?¬?c that matches the selected parameters is forwarded
ip Any IP protocol
any Keyword matching traf?¬?c from any source
any Keyword matching traf?¬?c to any destination
out Links ACL 101 to interface E0 as an output ?¬?lter
234 Chapter 6: Managing Traffic with Access Control Lists
ACL. If you are using a software version earlier than Cisco IOS Release 12.3, you can insert
statements only at the bottom of the named ACL.
Because you can delete individual entries with named ACLs, you can modify your ACL without
having to delete and then recon?¬?gure the entire ACL. Use named IP ACLs when you want to
intuitively identify ACLs.
Creating Named Standard IP ACLs
The following list shows the steps that are required to con?¬?gure and apply a named standard IP
ACL on a router:
Step 1 De?¬?ne a standard named IPv4 ACL. Use the ip access-list standard global
con?¬?guration command.
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