[2710] in SIPB_Linux_Development
telnet in 5.2 not up-to-date
daemon@ATHENA.MIT.EDU (Sven Heemeyer)
Fri Mar 12 21:33:42 1999
Date: Fri, 12 Mar 1999 21:33:19 -0500
From: Sven Heemeyer <sven@MIT.EDU>
To: linux-dev@MIT.EDU
Hi,
I noticed a difference in the behavior of telnet in Linux-RedHat-Athena
5.2 versus regular athena workstations:
Telnet in Linux-Athena 5.2 tries a Kerberos 4 login first, while telnet
on athena tries Kerberos 5 first (which makes it possible to forward
tickets, of course). It even seems possible to me that the Linux-Athena
telnet does not support Kerberos 5 at all.
Is the telnet included in Linux-Athena 5.2 possibly an older version
than the one on Athena workstations?
Here are some sample sessions:
1) ON LINUX-ATHENA 5.2:
55 >telnet gewurtz
...trying Athena's default telnet options: "-axf"
Trying 18.78.1.184...
Connected to GEWURTZ.MIT.EDU (18.78.1.184).
Escape character is '^]'.
[ Trying KERBEROS4 ... ]
[ Kerberos V4 accepts you ]
[ Kerberos V4 challenge successful ]
What you type is protected by encryption.
Password for sven:
Athena RVD (linux) Version 8.2.0 Mon Oct 5 16:27:15 EDT 1998
[...]
2) ON LINUX-ATHENA 5.2, TRYING TO DISABLE KERBEROS 4 IN THE HOPE THAT IT
WOULD THEN DO KERBEROS 5:
56 >telnet -axf
telnet> auth disable KERBEROS_V4
telnet> open gewurtz
Trying 18.78.1.184...
Connected to GEWURTZ.MIT.EDU (18.78.1.184).
Escape character is '^]'.
Authentication negotiation has failed, which is required for
encryption.
Good bye.
3) ON AN ATHENA DIALUP MACHINE:
1 >telnet gewurtz
...trying Athena's default telnet options: "-axf"
Trying 18.78.1.184...
Connected to GEWURTZ.MIT.EDU (18.78.1.184).
Escape character is '^]'.
[ Kerberos V5 accepts you as ``sven@ATHENA.MIT.EDU'' ]
[ Kerberos V5 accepted forwarded credentials ]
What you type is protected by encryption.
Athena RVD (linux) Version 8.2.0 Mon Oct 5 16:27:15 EDT 1998
What DISPLAY are you using [default: none]?
Running standard startup activities ...
zwgc: Unable to open X display -- disabling X driver.
zwgc: To receive Zephyrgrams, (type `zwgc -ttymode').
Running custom startup activities listed in ~/.startup.tty ...
- Sven
