[ntp:questions] Authentication problem

Serge Bets serge.bets at NOSPAM.laposte.invalid
Wed Feb 27 12:18:01 UTC 2008


Hello Dennis,

 On Tuesday, February 26, 2008 at 11:29:58 -0800, Dennis Hilberg, Jr. wrote:

> start ntpdc, issue the unconfig command and put in the proper password
> when prompted, it won't be accepted.

It is a bug, introduced three years ago by a wrong fix for another bug.
Previously "unconfig" was prompting for both a keyid and a password, as
it should. Since then, it prompts for a password only, which is not
enough. Full story at <http://bugs.ntp.org/401>.


> addserver works fine though.

It may fail too, if the requestkey-id and the symmetric keyid used to
authenticate the added server are not the same.


An easy workaround is to preset the requestkey-id:

| ntpdc> keyid 1
| ntpdc> unconfig 63.240.161.99
| MD5 Password: somepassword
| done!

But even that could fail with the current ntp-dev: "attempt to remove
configure bit is invalid".


Serge.
-- 
Serge point Bets arobase laposte point net




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