[K12OSN] OT - Can't authenticate Ubuntu 8.04 to LDAP

Carl Keil carl at snarlnet.com
Sat Sep 20 19:32:00 UTC 2008

Thanks for the tip Todd.  I'll try that when I go in on Monday.  Do you 
know any way to "wipe the LDAP login slate clean" on the client?  I've 
edited a bunch of conf files.  When I simply comment out the ldap lines 
that I've added then I can't log in at all (except as root/recovery) to 
uncomment them out again.  Then, I can log in again, but the login 
process is super slow (minutes).  It got slow when I first edited those 
files.  It's only allowing local logins (accounts created on the 
client), but it feels like it's trying to do an LDAP thing too and I 
have to wait for some sort of timeout from LDAP and maybe from the /home 
export before the computer gets going. 

I was sloppy and in a hurry when I first edited those files.  I should 
have made backups and kept a log of what I was doing, but I didn't.  Is 
there any way to recreate the default conf files for pam and libnss and 
all that stuff?  I'm getting the feeling I need to reinstall Ubuntu on 
that box and really start over.  It's a drag, because I did a bunch of 
other configuring on that box to make it my workstation (dual monitors, 
etc., etc.).



> You should be able to run ldapsearch from the client by specifying the
> server. I think the command is
> ldapsearch -H hosturl -D bindname -W
> but I don't have access to an LDAP server to check that at the moment.
> On Fri, Sep 19, 2008 at 8:40 PM, Carl Keil <carl at snarlnet.com> wrote:
>> > Hey Folks,
>> >
>> > I've been trying for weeks to set up an LDAP server.  I've got the feeling
>> > that they LDAP server is working, but I'm not sure.  I am sure that I can't
>> > get my Ubuntu 8 test client to authenticate from it.  Is there anything like
>> > a troubleshooting procedure for this?  Is there a way to test my connection
>> > to the server from the client short of rebooting and trying to log in?
>> >  (Make sure I'm not having firewall, dns, etc. issues?)
>> > Also, I kindof think my test client is fairly hosed from all the conf file
>> > editing I've done.  I've tried uninstalling ldap-auth-config and
>> > reinstalling it, but it doesn't ask me questions when I reinstall.  Is there
>> > a procedure for "resetting" all the files that pertain to logging in (the
>> > stuff in pam.d, etc.), so that I can try reconfiguring for LDAP
>> > authentication from scratch again?  Right now my client takes forever to log
>> > in (locally), so testing is a real pain.
>> > Any help would be appreciated.
>> >
>> > Thanks,
>> >
>> > ck

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