password History Depth

[j773303]

Hi expert,
I've a question about password History Depth, in the normal passwd, is it possible set password History Depth?

note: the system doesn't enable shawdow password or Trusted system.

[whiteknight]

hi,

I don't think it is possible.

http://docs.hp.com/en/5992-1933/apas03.html, it is for trusted system.

WK

[A. Clay Stephenson · Accepted solution]

This is one of those "it depends" situations. For an untrusted (standard) passwd ssystem the answer is "no" as delivered BUT one can always implement a password history by creating a substitute passwd and/or yppasswd command. This was the standard way of making more secure passwords with custom password composition rules before trusted systems were available. If you happened to be running NIS then this was really the only way to do it.

[j773303]

Hi Stephenson ,
Can you give me a hint, how to implement it in NIS ? Thanks in advanced

[A. Clay Stephenson]

If you have to ask, ... then no. You basically have to write it in C or C++. All the versions I have are still considered proprietary. None of it is very difficult and I have even built versions which were Web-based.

The critical function is the yppasswd function which communicates with the yppassdd daemon on the NIS master.

http://docs.hp.com/en/B2355-90695/yppasswd.3N.html

[j773303]

Hi expert,
I try to read the doc of yppasswd. But I can't find what I want.

Can show me the passwd history depth setting in yppasswd ? Many thanks.

[Dennis Handly]

>I try to read the doc of yppasswd. But I can't find what I want. Can show me the passwd history depth setting in yppasswd?

I believe Clay is telling you that you have to invent this all by yourself. You will have to provide a new executable that calls yppasswd(3N) and checks the depth before the call.

[j773303]

OK, I understand.
Thanks for all of your advise.