Please help me with my strange problem.
I tried configure the AC to permit the connection on the VTY (Telnet/SSH)
The AC is reacheable from ''Real World'' , but when try to connect in telnet or ssh, appear the login prompt without username/password and device freeze and reboot automatically after 2/3 seconds
In below the copy and past from my cmd.
Warning: Telnet is not a secure protocol, and it is recommended to use Stelnet.
Login authentication
<mi-comtel-ac-01>
<mi-comtel-ac-01>
<mi-comtel-ac-01>
Connessione all'host perduta.
The configuration is very simple
telnet server enable
stelnet server enable
aaa
local-user <username> password irreversible-cipher <password> privilege level 15
local-user <username> service-type telnet ssh
user-interface vty 0 4
protocol inbound all
authentication-mode aaa
I already tried to configure authentication-mode password and set authentication password cipher, under the VTY without success :(
NB: with the CE or Sx7xx work without issue.
My eNSP version is 1.2.00.510
I already tried with AC6005 and AC6605.

