[ECOS] SNMP authentication problem

Alperen Coskun a_a_coskunoc@hotmail.com
Fri Jun 27 15:11:00 GMT 2008



I mean with "it doesn't read", it doesn't take the lines from the snmpd.conf file and register them to the agent software. 
(It reads them from file). Anyway, i found another way to register them. But, i think there is a problem with hashing and md5 algorithm.
With the inputs snmp engine id and pass-phrase, the produced "kul" key isn't valid. (I gave the same inputs to different hash&md5 calculators, they gave the same result but not same with ecos md5 algorithm result.) 

Any ideas? 

----------------------------------------
> Date: Thu, 26 Jun 2008 15:56:21 +0200
> From: gbrutscheid@web.de
> To: a_a_coskunoc@hotmail.com; gary@mlbassoc.com
> CC: andrew@lunn.ch; ecos-discuss@ecos.sourceware.org
> Subject: RE: [ECOS] SNMP authentication problem
> 
> 
> I can create a file named as "snmpd.conf" in run time, write the given usernames, groups etc in it, then in "read_config.c" file, I can set SNMPCONFPATH as the folder to be read. I did it like that. But, I couldn't find a code  where it reads these lines in file...
> 
> 
> the "snmpd.conf" file is read in read_config.c.  
>  read_config_files(..)  looks for the file in the filesystem and if found 
>  read_config (configfile, ltmp, when) parse the "snmpd.conf".
> 
> 
> Georg
> 
> 
> ----------------------------------------
> > Date: Thu, 26 Jun 2008 05:13:15 -0600
> > From: gary@mlbassoc.com
> > To: a_a_coskunoc@hotmail.com
> > CC: andrew@lunn.ch; ecos-discuss@ecos.sourceware.org
> > Subject: Re: [ECOS] SNMP authentication problem
> > 
> > Alperen Coskun wrote:
> > > 
> > > Thanks for your response,
> > > 
> > > I think, the main problem is my ECOS snmp agent doesn't read the lines from snmd.conf file. (or reads but doesn't use it)
> > > Because, it should at least call "vacm_parse_security" or "vacm_parse_group" functions to register the user. but, it doesn't. 
> > > Or, i'm still missing some points.
> > > 
> > > May be there are some patches i didn't use. Can it be the problem? 
> > 
> > Where did you expect it to "read" this file from?  This is an _embedded_ system, no?
> > 
> > > ----------------------------------------
> > >> Date: Wed, 25 Jun 2008 14:41:20 +0200
> > >> From: andrew@lunn.ch
> > >> To: a_a_coskunoc@hotmail.com
> > >> CC: ecos-discuss@ecos.sourceware.org
> > >> Subject: Re: [ECOS] SNMP authentication problem
> > >>
> > >> On Wed, Jun 25, 2008 at 03:22:48PM +0300, Alperen Coskun wrote:
> > >>>
> > >>> I know its place, but I asked as the basic of SNMP, when I entered lines below to /etc/snmp/snmpd.conf file:
> > >>>
> > >>> createUser username MD5  "password"
> > >>> rwuser username auth
> > >>>
> > >>> it should create a user "username" with password "password" and encrypt&cypt the coming-coming packets according to MD5.  But, neither it creates a user in usm nor it encrypts&cypts the packets. The thing I want to learn is why it doesn't do it. When I aim to get any parameter from agent, agent says there isn't any user recorded. Am i doing sth wrong? 
> > >> I think i once did use the snmpd.conf file, but i don't remember if we
> > >> put users in it. I did test create using dynamically using the tests
> > >> shown on
> > >>
> > >> http://ecos.sourceware.org/docs-latest/ref/net-snmp-test-cases.html
> > >>
> > >> Do these tests work for you? I you might need to enable some of the
> > >> features in tests/snmpping.c
> > >>
> > >>     Andrew
> > 
> > 
> > -- 
> > ------------------------------------------------------------
> > Gary Thomas                 |  Consulting for the
> > MLB Associates              |    Embedded world
> > ------------------------------------------------------------
> 
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