Chapter 10 VPN
SBG5500 Series User’s Guide
183
b. Incorrect server address configured on the client device.
Action:
From the SBG’s GUI, click
VPN
>
IPsec VPN
.
(1) If the
Local Gateway Address
for
Default_L2TP_VPN_GW
is set to
“Any”
:
(2) If the
Local Gateway Address
for
Default_L2TP_VPN_GW
is an IP address:
Use that IP address for the client device to connect.
c. The WAN interface which the SBG’s L2TP VPN is using is not connected.
Action:
From the SBG’s GUI, click
Status
. Check if the WAN interface used by L2TP VPN is connected.
d. The client device has an incorrect IPsec pre-shared key configured.
Action:
From the SBG’s GUI, click
VPN
>
L2TP VPN
. The client device should use the same pre-shared key.
e. The L2TP VPN is not fully enabled.
Action:
From the SBG’s GUI,
(1) Click
VPN
>
L2TP VPN
. Select the
Enable
check box and click
Apply
.
(2) Click
VPN
>
L2TP VPN
. Select the
Enable
check box and click
Apply
.
f. L2TP or IPsec is not configured correctly on the client device.
Action:
Check the L2TP VPN configuration on the client device.
g. The client entered an incorrect user name or password.
Action:
From the SBG’s GUI, click
Maintenance
>
User Account
. The client should use one of the
accounts to make the connection.
h. The SBG exceeds the maximum number of concurrent L2TP VPN connections.
Action:
There are too many clients connected. Wait a while and then retry.
2
A windows L2TP client fails to connect to the SBG with an "invalid certificate" message.
Tip:
Windows sometimes may show this error even if the client device has been configured with a
correct pre-shared key for authentication. This usually happens at the first connection attempt after a
new connection profile is created. Reconfigure the pre-shared key on the client Windows device and
retry the connection.
3
An L2TP client device cannot reconnect after it is disconnected.
Tip:
If a client reconnects right after it is disconnected, the reconnection may fail. Wait 60 seconds
before reconnecting.
4
An L2TP client is disconnected unexpectedly.
Tip:
An L2TP connection will be dropped when one of the followings occurs on the SBG:
(1) Client has no activity for a period of time.
Summary of Contents for SBG5500-A
Page 12: ...12 PART I User s Guide...
Page 44: ...44 PART II Technical Reference...
