FTD 4000 series, connect module 1 telnet, error reading input file

[D Le Wando]

Hi,
if I try to enter module 1 via telnet, I get the error message:

# connect module 1 telnet
Type exit or Ctrl-] followed by . to quit.
error reading input file
#

It's only possible to enter it with console:

# connect module 1 console
Telnet escape character is '~'.
Trying 127.5.1.1...
Connected to 127.5.1.1.
Escape character is '~'.

CISCO Serial Over LAN:
Close Network Connection to Exit

Firepower-module1>

Any idea?

[ccieexpert]

It works fine in my lab so perhaps something is messed up in your environment.. you may want to try cisco support. have you tried the latest fxos ?

[D Le Wando]

Hi,
thx for reply. I updated both 4112 to latest FXOS version 2.14(1.167), but still the same issue. The first days, when I set up the devices, I connected via "connect module 1 telnet" without any issues. But one day, it was not possible any more ... don't ask me for the root cause ..
I will open a case for that ...