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Re: [bug-inetutils] inetutils-telnet always prompt entering username eve


From: Wu, Kuaikuai
Subject: Re: [bug-inetutils] inetutils-telnet always prompt entering username even if parameter '-l username' is specified.
Date: Sun, 28 Dec 2014 14:14:44 +0000

Hi Bob,
  Thank you for your opinion. When I used inetutils-telnetd as telnet server, 
it always prompt entering username even if parameter '-l username' is specified 
in telnet client. But when I used other telnet servers (such as 
netkit-telnetd), there wasn't such issue. Is it a bug of inetutils-telnetd?

Best Regards
Kuaikuai Wu

-----Original Message-----
From: Bob Proulx [mailto:address@hidden 
Sent: Saturday, December 27, 2014 8:49 AM
To: Wu, Kuaikuai
Cc: address@hidden; Lin, Shiqun (Tony)
Subject: Re: [bug-inetutils] inetutils-telnet always prompt entering username 
even if parameter '-l username' is specified.

Wu, Kuaikuai wrote:
> inetutils-telnet always prompt entering username even if parameter '-l 
> username' is specified. symptom is as below.

That feature depends upon support from the telnetd receiving the connection.  
The -l option sets the USER environment variable.  As such it requires the 
*receiving end* to do something with it.  If the server end does not then there 
isn't anything more that the telnet client can do.

> I hope inetutils-telnet just prompt entering password, What should I do?

Use a different telnetd (emphasis on the 'd', the daemon side of
things) that handles the USER environment variable.  Perhaps use the inetutils 
telnetd?

> address@hidden<mailto:address@hidden> inetutils-1.9.2]$ 
> sudo /usr/local/bin/telnet -l wukuaikuai localhost Trying 127.0.0.1...
> Connected to localhost.

I see that you are connecting to the localhost.  That is fine.  But note that 
telnet really is not suitable for the hostile Internet anymore.  For that 
always use a secure connection such as ssh.  Note also that ssh can use ssh 
keys for a secure no password login.  I suggest that regardless of other things 
that you convert from telnet to ssh for your remote login uses.

Bob



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