Question

What is the ACL command to allow only PCI to connect 192.168.20.0 network?

Answer 1

What is the ACL command to allow only PC1 to connect 192.168.20.0 network?

• access-list 1 permit 192.168.10.10. 0.0.0.255

It is also written as:

• R1(config)# access-list 1 permit 192.168.10.10 0.0.0.255
• Suppose we are configuring Router R1.
• 1 is the statement in given access comtrol list.
• Suppose that IP address of PC1 is 192.168.10.10.
• Wildcard mask of given network 198.168.20.0 is 0.0.0.255.

R1(config)# access-list 1 permit 192.168.10.10 0.0.0.255 IP address of PC1 wildcard mask of network 198.168.20.0

Description:

• ACL:

Access Control List - ACL is basically a set of rules or commands to filter or sift the traffic that enters or leaves the network or interface.

ACL controls the flow of data packets to and from the interface or networking device like router or switch by allowing commands that denies or permits the traffic to enter or leave the network.

• To permit a single host into a given network the syntax is as below:

  permit <source IP address> <wildcard mask of network>

• To create an ACL statement “access-list” command is used to configure the Access control list. Syntax is as below:

ROUTER (config)# access-list ACL# {permit|deny} { test-conditions }

• ACL# - It is a unique identifier that allows the group statements into a single access control list.
• permit/deny- Describes which action on data packets to be performed.
• test-conditions - Describes which data packet or source needs to match for a router interface.