[ale] telnets (secure telnet) anyone?

Tue Jan 14 23:14:05 EST 2014

Not sure if this helps, but Debian Wheezy has telnet-ssl and telnetd-ssl packages:

---

Package: telnet-ssl                      
New: yes
State: not installed
Version: 0.17.24+0.1-23
Priority: extra
Section: net
Maintainer: Ian Beckwith <ianb at debian.org>
Architecture: amd64
Uncompressed Size: 266 k
Depends: libc6 (>= 2.2.5), libncurses5 (>= 5.5-5~), libssl1.0.0 (>= 1.0.0),
         libstdc++6 (>= 4.1.1)
Conflicts: telnet
Provides: telnet-client
Description: telnet client with SSL encryption support
 The telnet command is used for interactive communication with another host
 using the TELNET protocol. 

 SSL telnet replaces normal telnet using SSL authentication and encryption. It
 interoperates with normal telnetd in both directions. It checks if the other
 side is also talking SSL, if not it falls back to normal telnet protocol. 

 Advantages over normal telnet: Your passwords and the data you send will not go
 in cleartext over the line. Nobody can get it with tcpdump or similar tools.
 With SSLtelnet you can also connect to https-server like
 https://www.mozilla.org. Just do 'telnet -z ssl www.mozilla.org 443'

Package: telnetd-ssl
New: yes
State: not installed
Version: 0.17.24+0.1-23
Priority: extra
Section: net
Maintainer: Ian Beckwith <ianb at debian.org>
Architecture: amd64
Uncompressed Size: 225 k
Depends: adduser, openbsd-inetd | inet-superserver, passwd, openssl (>=
         0.9.8g-9), libc6 (>= 2.3), libssl1.0.0 (>= 1.0.0)
Conflicts: telnetd
Provides: telnet-server
Description: telnet server with SSL encryption support
 The in.telnetd program is a server which supports the DARPA telnet interactive
 communication protocol. 

 SSL telnetd replaces normal telnetd using SSL authentication and encryption. It
 interoperates with normal telnetd in both directions. It checks if the other
 side is also talking SSL, if not it falls back to normal telnet protocol. 

 Advantages over normal telnetd: Your passwords and the data you send will not
 go in cleartext over the line. Nobody can get it with tcpdump or similar tools.

---

later!
   horkan

On Tue, Jan 14, 2014 at 06:57:28PM +0000, Lightner, Jeff wrote:
> First ??? Yes I know about ssh, wget, curl etc??? so please don???t talk to me about them or why using one of those is a better idea ??? this isn???t my choice.
> 
> The basic question:   Does anyone know about ???telnets??? NOT ???telnet??? and how to set it up on Linux (ideally specifically RHEL6) ?
> 
> It appears from what little I???ve gleaned that telnets is a secure ssl way to run telnet.   The services file has port 992 for this as opposed to 23 for regular telnet.
> 
> Unfortunately web searches all seem to think I want to know about telnet so drop the s in searches for the most part and I???m finding very little on it anywhere.   It appears that *possibly* one can tell telnet (and presumably telnetd) to use port 992 but I???m not finding much on HOW to tell it to do that or how I would determine if a specific telnetd (or telnet command for that matter) supports this secure setup (i.e. ssl).  I know I can tell the telnet command itself to use port 992 with ???telnet <host> 992??? but don???t know if that would be sufficient for the client side and it still doesn???t tell me what should be on the server (i.e. telnetd) side.
> 
> It???s also possible the 992 secure telnet is NOT the same thing as telnets and if you know that please feel free to advise me on what telnets actually is.   (I did find one thing that appears to be a commercial product but I???m hoping that isn???t what this is ??? other reading leads me to believe it isn???t.)
> 
> To make things even more fun we???re running RHEL6 which provides both telnet-server (in.telnetd) and the krb5 telnet.    Both have config files in /etc/xinetd.d but I suspect it isn???t as simple as just trying to add a port to the xinetd.d file for one of those.
> 
> We have a vendor that is saying they???ll need to configure this to do something with https interaction and I???m just trying to figure out what they???re on about before we actually have to do anything.
> 
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-- 
Horkan Smith
678-777-3263 cell, ale at horkan.net