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From Wed Jan 16 13:56:17 2002
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Message-Id: <>
Date: Wed, 16 Jan 2002 13:47:28 -0500
From: "Matthew Glogowski/Cambridge/IBM" <>
Subject: login name too long errors

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>Number: 1045
>Category: pending
>Synopsis: login name too long errors
>Confidential: yes
>Severity: serious
>Priority: medium
>Responsible: gnats-admin
>State: closed
>Class: sw-bug
>Submitter-Id: unknown
>Arrival-Date: Wed Jan 16 13:57:00 EST 2002
>Last-Modified: Thu Apr 4 16:41:11 EST 2002
>Originator: Matthew Glogowski
IBM Software Group
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>Release: krb5-1.2.3

System: SunOS crabgrass 5.8 Generic_108528-12 sun4u sparc
Architecture: sun4

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there appears to be a problem with the kerberos 1.2.3 sources.
i compiled the code with:

./configure --prefix=/usr/kerberos --enable-shared
--with-tcl=/usr/local --with-krb4

make all ran fine. reported no errors or warnings.

in the /etc/inetd.conf file on my system i have telnet and
enabled for synchronization.

# Kerberos Services
telnet stream tcp nowait root /usr/kerberos/sbin/telnetd \
telnetd -a valid
krb5_prop stream tcp nowait root /usr/kerberos/sbin/kpropd kpropd

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here is the series of commands i issued to attempt login:

matthewg@crabgrass [matthewg]% /usr/kerberos/bin/kinit
Password for matthewg@LOTUS.COM:
matthewg@crabgrass [matthewg]% /usr/kerberos/bin/klist
Ticket cache: FILE:/tmp/krb5cc_12790
Default principal: matthewg@LOTUS.COM

Valid starting Expires Service principal
01/16/02 13:17:35 01/16/02 23:17:35 krbtgt/LOTUS.COM@LOTUS.COM

Kerberos 4 ticket cache: /tmp/tkt12790
klist: You have no tickets cached

Connected to (
Escape character is '^]'.
Waiting for encryption to be negotiated...
[ Kerberos V5 accepts you as ``matthewg@LOTUS.COM'' ]
login name 'matthewg' too long

if i perform the same commands for the root account, i do get
without any problems. i also tried to get system access with
and the same error appears with 'login name too long'.

i have not tested the username character limit.

when i was using krb-1.2.2 sources from MIT there were no
problems with ktelnet username length.

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State-Changed-From-To: open-closed
State-Changed-By: hartmans
State-Changed-When: Thu Apr 4 16:40:23 2002
Fixed in 1.2.4.

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Matthew Glogowski
login name too long errors with remote access