Router(config-if)#no dialer callback-secure   

This command ensures that the initial call is always disconnected at the
receiving end and the return call is made only if the username is configured
for callback. If the username (hostname in the dialer map command) is not
configured for callback, the initial call stays up and no return call is
made.

So if you want to accept callback clients as well as non-callback clients,
you will need to disable callback security

Hope this helps



-----Original Message-----
From: Frank [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, November 22, 2000 7:47 AM
To: [EMAIL PROTECTED]
Subject: callback


when i dial in a 3640 ,before i setup the callback ,the user "frank"works,
after i setup callback ,and added the user "tom",tom works,the callback
succeeded,
but "frank" failed,so i guess the router must think "frank" is also a
callback user.Actually ,it's not .
I want to make some users be callback users,others not ,how can make such
config on the router ?

thanks.

frank

the following is cut from the running config:
username frank password 0 dd
username tom callback-dialstring 1001 password 0 ee
!

interface Group-Async1
 ip unnumbered Serial1/0
 no ip directed-broadcast
 encapsulation ppp
 dialer in-band
 dialer callback-secure
 async default routing
 async mode interactive
 peer default ip address pool default
 ppp callback initiate
 ppp authentication chap
 group-range 65 72
!




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