ACL, Introducion

Extended Access Control List (ACL) – Established Keyword

The “established” keyword is used to indicate an established connection for TCP protocol. An established connection can be considered as the TCP protocol traffic originating inside your network, not from an external network.

This means that the packets belong to an existing connection if the Transmission Control Protocol (TCP) segmenthas the Acknowledgment (ACK) or Reset (RST) bit set.

Example:

Router03(config)#access-list 102 permit tcp any any eq www established

Posted By – RamCruiseWalker

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s