Digi TransPort WR31 User Manual page 457

Configure Virtual Private Networking (VPN)
Source Port Normal/Variable
These radio buttons select the source port for the L2TP tunnel. Setting this setting to Normal
uses the default port number, 1701. If set to Variable, this setting uses a random source port
value.
Name
The name that identifies the router during the negotiation phase when establishing an L2TP
tunnel.
Authentication Off/Secret
The radio buttons select whether or not to use authentication. This is normally set to Off as most
host systems require using IPsec over L2TP tunnels. If Authentication is set to On,
authentication is enabled and the Secret parameter becomes relevant. The value in the text box
contains a passphrase shared with the host. The router uses this passphrase if the remote host
requests authentication and Authentication is set to Off here.
Related CLI commands
Entity Instance Parameter
l2tp n listen
l2tp n swap_io
l2tp n remhost
l2tp n backremhost
l2tp n aot
l2tp n nocallto
l2tp n window
l2tp n ll_ent
l2tp n ll_add
l2tp n rnd_srcport
l2tp n name
l2tp n auth
l2tp n secret
Digi TransPort WR Routers User Guide
Values Equivalent web parameter
off, on Act as a listener only
off, on Enable server mode
Valid IP address Initiate connections to a.b.c.d
a.b.c.d
Valid IP address Use a.b.c.d as a backup
a.b.c.d
off, on Bring this tunnel up All the time/On demand
0-4294967296 Bring this tunnel down if it is idle for h hrs, m
mins, s secs
1-7 L2TP Window Size
Default=4
<blank>, PPP, ETH Route UDP packets over interface x,y
0-2147483647 Route UDP packets over interface x,y
off, on Source Port
Up to 30 Name
characters
off, on Authentication Off/Secret
Up to 80 Authentication Off/Secret
characters
IPsec parameters
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