From: Anant Chakole (anantmc@rediffmail.com)
Date: Fri Aug 15 2003 - 23:24:50 GMT-3
Hi
The dialer callback server affects those user that are not authorized to
be call back through configuration of the dialer callback-server comman.
If the username i.e the hostname argument in the dialer map command, is
not authorized for the callback, the call will be disconnected if the
dialer callback-server commnd is configures.
The following example BRI0 is configured with the commands required to
make it function as the callback server on the shared network. Callback
security is enabled on BRI0, such that any user other than user1 will be
disconnected and not called back.
interface BRI0
ip address 172.19.1.9 255.255.255.0
encapsulation ppp
dialer callback-secure
dialer enable-timeout 2
dialer map ip 172.19.1.8 name user1 class dial1 81012345678901
dialer-group 1
ppp callback accept
ppp authentication chap
!
map-class dialer dial1
dialer callback-server username
I think this is enough to understand how dialer callback-secure works.
Best Regards
Anant
ccie2be wrote:
>Hi,
>
>In configuring ppp callback, the cisco doc-cd says the "dialer
>callback-secure" command enables security. But, isn't this redundant since
>either ppp pap or chap has to be configured?
>
>If anyone knows, could someone explain how dialer callback-secure provides
>more security than if it were left out of the configuration.
>
>Thanks in advance, dt
>
>
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