Hi all,

Looking at Task 4 in LAB 17 Volume 1. In brief the specific task I am looking 
at:

[Username "Unlock" password "NOW..." Telnet access to R8 should not be allowed from devices behind R7 until 
user "Unlock" from R7 has authenticated. Once "Unlock" is authenticated, "Test" should be able to 
log in from any device.]


As I have not had much experience with doing such granular vty access control, 
I need some guidane on this. I think I get the ACL part of the configuration, 
however in the DSG it mentions binding the access-class to Serial 0/0/0. As I 
am keen to try new and different things I did attempt this, and found that it 
is not possible. access-class coomand is not accepted as a suitable interface 
command.


If the DSG is guiding you to do the following on R8:


username Unlock autocommand access-enable
 username Unlock password NOW...
 access-list 102 permit tcp host 150.100.78.7 any
 access-list 102 dynamic TELNET permit ip any any
 access-list 102 deny tcp any host 100.100.200.8
 access-list 102 deny tcp any host 150.100.81.8
 access-list 102 deny tcp any host 150.100.78.8
 access-list 102 deny tcp any host 200.0.0.8
 access-list 102 permit ip any any
 int s0/0/0
 access-class in 102


To double check, I have looked at the IOS command reference and it all points 
to access-class been associated with vty's.


Is there another way of doing this?

You could restrict telnet access to R8 coming from R7 by doing an ACL on R7, 
BUT that doesnt accomodate the requirement to allow telnet once user Unlock is 
authnenticated.


Look forward to some opinions / advise.


Regards

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