On Wed, 12 Apr 2000, Simon Yeh wrote:
|An interesting question, so I tried different chat sequences for pppd to
|invoke, and I discovered that with or without login/password, or even with
|invalid login/password pair, my ISP always merrily finished the chat script
|and kick off ppp session (and request PAP from my host). On the other hand,
|if I use minicom to dial manually, then my ISP prompted me for login/password
|once I got connected, and this time I must provide valid login/password
|pair in order to proceed, at which time the ISP would automaticaaly kick off
|a ppp session. Isn't that strange? As if my ISP's terminal server knows
|when the login procedure is needed or optional, once the connection is made?
Here's an experiment to try. Dial up in minicom and as soon as the minicom
"Press any key to continue" message appears press Enter, and then, as
quickly as possible, send the character ~ . If it is done quickly enough
then I suspect the ISP response will not be a prompt but instead will be
the characters that result from PPP LCP negotiation messages, so often
referred to as "garbage."
This is what happens here with one of my ISPs that will accept either
login/password, or PPP authentication via CHAP or PAP. If nothing is sent
then a login prompt appears after a 4 or 5 second timeout interval. If
Enter is pressed a second time before the timeout occurs then the prompt
appears immediately. (However, if a valid login/password is entered then
the ISP here doesn't request PPP authentication too.)
---
Clifford Kite Not a guru. (tm)
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