[rrd-developers] [rrd] Why / How / When is version 1.2 developed?

Bernhard Reutner-Fischer rep.dot.nop at gmail.com
Wed Apr 8 09:57:15 CEST 2009

On Wed, Apr 08, 2009 at 02:18:58AM -0500, kevin brintnall wrote:
>On Wed, Apr 08, 2009 at 07:38:06AM +0200, Tobias Oetiker wrote:
>> I have been telling people about the daemon feature at recent talks
>> and the auth question came up often ... the reason fetch is tipping
>> the scale for me is that with this functionality rrdcached goes
>> from a 'submit only' server to a 'read/write' server ... and
>> providing something read/write over the network without
>> authentication is a recepie for trouble in my book. and after all,
>> it is my name associated with rrdtool ...
>Tobi et al,
>Here is what I'm thinking for authentication:

Just curious as to why not just use the existing infrastructure (hosts.allow,

# allow user1 on box1 and everybody on the local net except that one bad box
rrdcached: user1 at box1.foo.com, .foo.internal EXCEPT badbox.foo.internal

And if you really want the user to authenticate then reuse pam (pam_start(),
if pam_authenticate() != PAM_SUCCESS fail())

What am i missing?
>* server has a list of secrets that it accepts
>  * easier than user:pass mapping, which is overkill IMO
>  * allows for secrets to be rotated with overlap time.. no flash cut
>* some sort of challenge/response authentication would be nice
>  * pick something easily implemented in 3rd-party rrdcached client
>  * i.e. CRAM-MD5 ? (concerned with MD5 weakness?)
>* a place to stash the secret
>  * by default, some file like $HOME/.rrd*
>  * override with some environment variable?
>  * modify all APIs to pass on the command line ??
>* successful authentication can turn an un-privileged socket into a
>  privileged one.
>  * this still allows any user to execute things like "flush", "stats", etc
>  * operations privileged sockets still don't require auth
>On the wire, looking something like:
>     C:  AUTH
>     S:  1 Challenge:
>     S:  <nonce>
>     C:  AUTH <nonce> hash(<nonce>,<secret>)
>     S:  0 AUTH OK
>  or S:  -1 AUTH FAILED
>     C:  AUTH
>     S:  0 Not required.

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