Configuration and Administration > Devices > One Time Password Configuration

One Time Password Configuration
Note: The One Time Password feature is only supported when an analog modem is used, not when an ISDN modem is used.

The ACS does not support external modems connected to serial ports.
Only PCMCIA modem cards are supported on the ACS.
One Time Password is configured on the Dial Up form when you are either adding or editing an ACS configuration. An example One Time Password setup form is shown in the following figure, “Dial Up Form with One Time Password Setup.”
Dial Up Form with One Time Password Setup
To Enable the OTP Authentication for Dialup
Caution: It is strongly recommended that you do not attempt to upload firmware using a modem connection.
Note: This feature is not available with ISDN modems.
1.
This enables the “Enable OTP” check box and causes the field labels “PPP Phone,” “PPP User,” and “PPP Password” to turn red (indicating the requirement to fill in these fields).
Note: If you check the “Automatic PPP IP” check box, you will not need to fill in the “PPP Device IP” and “PPP Local IP” fields, as these parameters will automatically be created by the APM. The APM does this by reading a list of PPP device IPs and PPP local IPs in its database. It will then search, starting from 10.0.0.1 until it finds 2 free IP addresses.

If the “PPP Device IP” and “PPP Local IP” fields have already been filled in, the “Automatic PPP IP” check box will toggle these fields as filled in (when unchecked) and as filled in with a grayed out “Auto” (when checked).
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Note: If you fill in the name of a user not already configured on the APM, the user will automatically be configured as the PPP user. You will not need to configure this user separately, unless you want the PPP user to be on a notification list.
4.
Click the “PPP Password” box. This generates a dialog box in which you enter the PPP user’s password and then confirm it.
5.
This causes the following items to become visible: “OTP User” field, “OTP Passphrase” button, “Auto Refresh” check box, and “Random Passphrase” check box.
Note: The OTP check box does not appear when an ISDN modem is being configured.
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Enable “Auto Refresh” This will refresh the OTP sequence by resetting the sequence number to 499 automatically when you dial in and there are fewer than 20 one time passwords remaining.
If you do not check this box, the sequence needs to be refreshed manually by clicking the “Reset Sequence” button and then doing an upload.
Note: Checking the “Auto Refresh” box disables the “Reset Sequence” button.
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Configuration and Administration > Devices > One Time Password Configuration