[ale] telnets (secure telnet) anyone?

Tue Jan 14 15:10:27 EST 2014

Thanks for the responses so far.  To address some of the feedback.

I already knew about port 992 in /etc/services as mentioned in my original email.

I had seen the document for IBM iSeries but wasn’t sure it was relevant to Linux.

I had seen the stunnel stuff but I don’t *think* this is about talking to it via a PC/PuTTY (and could be dead wrong).

The TLS link was new to me but I’m not sure it is the same as telnets.

On to the non-technical  implications folks are wondering about:
This is a new app they want to use in our environment and I would dearly love to tell the vendor to get stuffed but the decision to use them was made a pay grade way above mine.    The number of boneheaded things they’ve already told us to do indicate a clear misunderstanding of many things Linux.  One of the saddest was when they told the team that was working on this a printing issue was because we hadn’t configured a printer on the host OS.   When we pointed out that a) The printer IS configured on our CUPS print server used by all Linux environments and b)  We can print just fine to that printer from command line on the server that has their app they still insisted we configure the printer/CUPS on that server specifically.    Not surprisingly the application still didn’t print when we did that configuration and only at that point did they realize that they had to configure the printer inside their application to use the printer the OS was presenting to them.

From: ale-bounces at ale.org [mailto:ale-bounces at ale.org] On Behalf Of Jim Kinney
Sent: Tuesday, January 14, 2014 2:53 PM
To: Atlanta Linux Enthusiasts
Subject: Re: [ale] telnets (secure telnet) anyone?

perhaps they want to use stunnel to wrap telnet? It will do what they claim and is part of RHEL6.

http://7thumbs.wordpress.com/2012/08/27/stunnel-sslifing-telnet/
That said, tell 'em to go get stuffed for using a boneheaded, bassackawards solution to a common problem when a ready solution exists.
or maybe they could actually figure out _how_ to use putty on their winders systems to tunnel into your server(s).

On Tue, Jan 14, 2014 at 1:57 PM, Lightner, Jeff <JLightner at water.com<mailto:JLightner at water.com>> 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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James P. Kinney III

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