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A comment on Securing Telnet with SSL. Parent comment

Re:Securing Telnet with SSL by crispyambulance on Friday May 05, 2017 @10:06AM (#14273501)
"Bob" is using some kind of "old iron" possibly emulated on mainframe and communicates to it with a retro terminal client (5250 ?).

So... do brokerages use telnet in the wild?

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Re:Securing Telnet with SSL by protomyth on Friday May 05, 2017 @10:09AM (#14273516)
Well, I know of at least one iSeries (AS400) software vendor who does use it in the wild.
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Re:Securing Telnet with SSL by jaboutboul on Friday May 05, 2017 @10:15AM (#14273554)
there are many trading floors which are still run by IBM mainframes which do still use telnet
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