Extended ACL
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Transcript of Extended ACL
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extended IP access lists•
Create named access lists•
Objectives
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From TCP/IP Protocol Suite p.180 by Behrouz Forouzan McGrawHill
IP Packet
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From TCP/IP Protocol Suite p.282 by Behrouz Forouzan McGrawHill
TCP Segment
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Can filter by source IP address, destination IP address, protocol type, and application port number
•
Permit or deny a single type of IP protocol○
Filter by a particular port of a particular protocol
○
This granularity allows you to design extended IP access lists that:
•
Extended ACL
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• Extended ACL must be configured on the router or firewall closest to the source
• Extended ACLs must be applied to the Interface closest to the source
EACL
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Extended ACLs work in the third and forth layer of OSI Reference Model.
•
Extended ACLs work by checking the source and destination IP addresses and ports.
•
Summary
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McQuerry, Stephen. (2008) Interconnecting Cisco Network Devices, Part 1 (ICND1): CCNA Exam 640-802 and ICND1 Exam 640-822, 2nd Edition Cisco Press ISBN: 978-1-58705-462-4
Kelly Cannon, Kelly Caudle ,Anthony V. Chiarella (2009) CCNA Guide to Cisco Networking Fundamentals, International Edition, 4th Edition ISBN-13:9780840031198
Reference
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