Kerberized telnetd: -a valid option & eight char limit on account

Jeffrey Altman jaltman2 at
Thu Oct 21 18:08:34 EDT 2004

Which Microsoft telnet.exe are you using that supports Kerberos 5 
authentication?  As far as I am aware, the Microsoft telnet.exe
only supports NTLM.

Jeffrey Altman

ROSS, Colin wrote:
> While testing use of the product VAS, I found that I could
> not get the -a valid argument to telnetd to work. I had to regress to
> the position of removing the -a valid argument from telnetd, whilst
> using the -aFx arguments with the M$ telnet client. A pity because I
> hoped to make telnet connections to my Solaris 9 Sparc box with needing
> to supply account names and passwords. I am at the position of not
> needing to supply account names right now.
> I also found that using the telentd that came with the Kerberos 1.3.5 I
> compiled left me with a problem arising from the use of long (> eight
> char) account names. My own account works fine, since it is quite short.
> Other users have been unable to telnet to the Solaris 9 box because
> their login is stumped when the account is a long name. For example,
> jonesj will work, but williamsmithf will not. This is a real pain as all
> account names are managed in M$ Active Directory product and some of the
> names are quite long (aren't people a bore, having such names).
> My point is, how can I re-compile Kerberos/telnetd to build in support
> for long account names? Secondly, what are the requisite steps I must
> take to permit the -a valid argument to telnetd to work? Is this keytab
> related?
> Best
> Colin
> PS Thx again for the previous assist re. 64 bit kerberos compile- works
> fine
> Colin Ross
> Readers & Technical Services Librarian
> Library
> House of Lords
> London
> SW1A 0PW
> 0207 219 2511
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