Reflexive ACL vs Telnet established

From: Carlos Campos Torres \(ccampost\) (ccampost@cisco.com)
Date: Wed Jun 07 2006 - 15:14:19 ART


Hi all,

Just wondering what the difference between allowing telnet in a
reflexive ACL and just creating an access-list with the established
keyword would be.

Example: In Internetwork Experts Lab 5 Task 9.1 they ask to have telnet
connectivity if a router started the connection

Option 1)

R2(config)#ip access-list extended INBOUND
R2(config-ext-nacl)#permit tcp any eq telnet any established

Option 2)
R2(config)#ip access-list extended INBOUND
R2(config-ext-nacl)#evaluate REFLECT
R2(config)#ip access-list extended OUTBOUND
R2(config-ext-nacl)#permit tcp any any eq telnet reflect REFLECT

What would be the difference between doing it one way or the other?

Any comments will be highly appreciated

Thanks!

Carlos Campos



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