From: David Hurtado (dei2viccie@hotmail.com)
Date: Fri Mar 26 2004 - 23:18:31 GMT-3
Hello everybody. I have a couple of questions about PPP callback:
1.- The Doc CD explains that the "dialer callback-secure" is used to avoid
to call back users that are not authorized.
But this is already done by the "dialer callback-server" command (If you
only enable "dialer callback-server" without "dialer callback-secure", only
the users that are authenticated can be called back. You don't need "dialer
callback-secure" at all).
What i have seen is that if you configure "dialer callback-secure", the
router will not accept calls that don't negotiate call back. I mean that if
you try to call the router without callback negotiation, the call will never
be accepted.
I hope somebody could tell me if my understanding is rigth, because the Doc
CD explanation is so confusing.
2.- I have been trying to configure PPP callback identiyfing the return call
during negotiation (using "dialer callback-server dialstring"), but i can't
make it work.
Please, tell me what i'm doing wrong. Here are the configurations:
R5
interface BRI0/0
ip address 167.1.45.5 255.255.255.224
encapsulation ppp
dialer idle-timeout 60
dialer map ip 167.1.45.4 name ROUTER4 broadcast 5272024
dialer map ip 167.1.45.4 name ROUTER4 broadcast 5272026
dialer-group 1
isdn switch-type basic-ni
isdn spid1 51552720250101 5272025
isdn spid2 51552720270101 5272027
ppp callback request
ppp authentication chap callback
R4
interface BRI0/0
ip address 167.1.45.4 255.255.255.224
encapsulation ppp
dialer idle-timeout 60
dialer map ip 167.1.45.5 name Rack1R5 class CALL broadcast 5272027
dialer map ip 167.1.45.5 name Rack1R5 class CALL broadcast 5272025
dialer-group 1
isdn switch-type basic-ni
isdn spid1 51552720240101 5272024
isdn spid2 51552720260101 5272026
isdn caller 5272027
isdn caller 5272025
ppp callback accept
ppp chap hostname ROUTER4
ppp chap password 0 CISCO
map-class dialer CALL
dialer callback-server dial-string
Thanks for the help
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