User’s Manual
NETIO-230A
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17
5.3
Serial port, Telnet and CGI command control
5.3.1
Secure login
NETIO-230A supports two login modes – open login and login with encrypted password. Encrypted
password can be used for Telnet, http and serial link control. Login via web interface is encrypted
automatically.
For secure login you first need to obtain the
hash
code from the device. You can obtain this
code in a return code after the connection via the RS-232 interface, via Telnet or CGI command
hash
.
To calculate the proper encrypted login password MD5 hash function is used: <User Name>
<Password> <
hash
>. It is 128-bit number transmitted as 32 digit hexadecimal number.
5.3.2
Serial port communication
NETIO-230A is equipped with RS-232C serial interface. Serial port control uses the same set of
commands as Telnet. You can find the list in chapter 5.3.4.
Communication parameters:
Baud rate: 19200 baud
Data bits: 8
Stop bits: 1
Parity: none
Flow control: none
5.3.3
Telnet communication
To connect to your NETIO-230A via Telnet please follow these steps:
1)
Open command prompt (Start – Run – cmd)
2)
Enter command
telnet 192.168.10.100
(please change the address to yours accordingly)
3)
The device should give you the reply like:
100 HELLO EB5D61F6
Last 8 characters is the
hash
code needed for secured login with encrypted password.
4)
Now you can login by entering command
login name password
, where
name
is the user
name and
password
is your password. If you entered corrected credentials the device
should reply
250 OK.
Now you are logged in and you can use commands to control your
NETIO-230A.
Note:
Windows Vista does not include the Telnet client by default and it may be needed to install it
separately.