CCNA Cisco Certified Network Associate Study Guide - FTP Server

Access Lists 443
IP extended access list
IPX SAP access list
Extended 48-bit MAC address access list
IPX summary address access list
Protocol type-code access list
DECnet access list
XNS standard access list
XNS extended access list
Appletalk access list
48-bit MAC address access list
IPX standard access list
IPX extended access list
By using the access list numbers between 1–99, you tell the router that you
want to create a standard IP access list.
RouterA(config)#access-list 10 ?
deny Specify packets to reject
permit Specify packets to forward
After you choose the access list number, you need to decide if you are
creating a permit or deny list. For this example, you will create a deny
statement:
RouterA(config)#access-list 10 deny ?
Hostname or A.B.C.D Address to match
any Any source host
host A single host address
The next step requires a more detailed explanation. There are three
options available. You can use the any command to permit or deny any host
or network, you can use an IP address to specify or match a specific network
or IP host, or you can use the host command to specify a specific host only.
Here is an example of using the host command:
RouterA(config)#access-list 10 deny host 172.16.30.2
This tells the list to deny any packets from host 172.16.30.2. The default
command is host. In other words, if you type access-list 10 deny
172.16.30.2, the router assumes you mean host 172.16.30.2.