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SUSE Linux Enterprise Server 12 (x86_64)
VERSION = 12
PATCHLEVEL = 0

On server running legacy software with text GUI (perl/c).

When connected via ssh - all is ok. When connected via telnet - both, screen redraws and sending pressed keys to server work with visible delays.

Why? And how to fix?

UPD If I connect to host via ssh, and after that run telnet localhost - delays does not occurs.

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4
  • Does "don't use telnet" qualify as an answer?
    – user
    Commented Mar 28, 2017 at 13:08
  • @MichaelKjörling Unfortunately no
    – rjhdby
    Commented Mar 28, 2017 at 13:16
  • Well then; does connecting to localhost within an otherwise responsive session incur the same delays as a (presumably) remote telnet connection?
    – user
    Commented Mar 28, 2017 at 13:33
  • @MichaelKjörling update question
    – rjhdby
    Commented Mar 28, 2017 at 13:55

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