Digi TX54 User Manual page 512

Virtual Private Networks (VPN)
If Automatic, CHAP, or PAP is selected, enter the Username and Password required to
authenticate.
The default is None.
h. (Optional) For Authentication method, select the authentication method, one of:
n
n
n
n
n
n
i. (Optional) Type the Metric for the tunnel, if other than the default of 1.
j. Select a firewall Zone for the tunnel. This is used by packet filtering rules and access
control lists to restrict network traffic on the tunnel.
k. (Optional): Custom PPP configuration:
i. Enable custom PPP configuration.
ii. Enable Override if the custom configuration should override the default configuration
and only use the custom options.
iii. For Configuration file, paste or type the configuration data in the format of a pppd
options file.
8. Click Apply to save the configuration and apply the change.

Command line
1. Log into the TX54 command line as a user with full Admin access rights.
Depending on your device configuration, you may be presented with an Access selection
menu. Type admin to access the Admin CLI.
2. At the command line, type config to enter configuration mode:
> config
(config)>
3. (Optional) Set the UDP listening port that L2TP servers will listen on:
(config)> vpn l2tp port value
(config)>
where value is an integer between 1 and 65535. The default is 1701.
4. Set the access control for L2TP tunnels:
TX54 User Guide
None: No authentication is required.
Automatic: The device will attempt to connect using CHAP first, and then PAP.
CHAP: Uses the Challenge Handshake Authentication Profile (CHAP) to
authenticate.
PAP: Uses the Password Authentication Profile (PAP) to authenticate.
If Automatic, CHAP, or PAP is selected, enter the Username and Password
required to authenticate.
The default is None.
L2TP
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