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"I can't log in to PDC"-FAQ.

Here you'll find a trouble-shooter for login problems on the PDC computers.

The error messages below can have different causes, but we list the most common ones here. If the suggestions below doesn't seem to solve your problem, please read the last section and we will do our best to help you.

Contents

  1. Telnet says "mk_req failed: No ticket file (tf_util)"
  2. Telnet says "[ Kerberos V4 refuses authentication because user is not authorized ]"
  3. Telnet says "[ Kerberos V4 refuses authentication because Can't decode authenticator (krb_rd_req) ]"
  4. Kauth says "Time is out of bounds (krb_rd_req)"
  5. Rxtelnet says "kx: strindberg.pdc.kth.se: Permission denied"
  6. I've tried everything but I still can't login


Telnet says "mk_req failed: No ticket file (tf_util)"

You probably need to do "./kauth -n username@NADA.KTH.SE -h strindberg" (where username should be replaced with your login name at PDC).

If kauth for some reason fails (ie. it prints an error message), have a look in the contents to see if the error message is listed. If you can't get it to work, please mail us the output of the program.

See the kerberos section of the guided tours for more information.


Telnet says "[ Kerberos V4 refuses authentication because user is not authorized ]"

Do you have the same username on your local machine as on our machines? If not, that may be the cause. You have to indicate to telnet what your PDC account is.

For instance if your account at PDC is "bar", then use:

$ ./rxtelnet -l bar strindberg.pdc.kth.se

to log into PDC-machines.


Telnet says "[ Kerberos V4 refuses authentication because Can't decode authenticator (krb_rd_req) ]"

If you don't find any other reason to what may cause this, it might be that your local system is misconfigured. One common cause for this kind of problem is the use of /etc/hosts for hostname lookups instead of a proper nameserver. If this happens, please mail us.


Kauth says "Time is out of bounds (krb_rd_req)"

Your computer clock must be within five minutes from the correct time, use "date" to check the current time on your local machine.

If you wan't your computer to automatically use the correct time, see the NTP section of the guided tours for more information.


Rxtelnet says "kx: strindberg.pdc.kth.se: Permission denied"

Rxtelnet needs a local connection (for security reasons) to your X-server, so you need to have a X server running on the same computer that you invoke rxtelnet on, and have the DISPLAY variable set to ':0.0'.

If you get the above error, type (for csh, tcsh):

setenv DISPLAY :0.0

or (for sh, bash):

DISPLAY=:0.0

and try again.


I've tried everything but I still can't login

Although we try to provide you with enough information to resolve the most common problems that appear, there are of course occasions when there is something extra peculiar going on. If you couldn't resolve your problem by reading our information given in the "Guided Tours" and "Helpdesk" sections of this user support section please let us help you. Fill out our kerberos problem report or mail detailed information about your problem to pdc-staff@pdc.kth.se

When you mail us regarding your login problems, please try to provide as much information as possible. Output from the following commands will help us locating your problem (Don't forget to move to your kerberos directory first):

	pwd          
	./kauth user@NADA.KTH.SE
	./klist
	./telnet
        date -u
	date
	telnet www.pdc.kth.se daytime
	grep `hostname` /etc/hosts
        echo $DISPLAY


pdc-staff, $Date: 2001/11/15 10:07:37 $