Pptp Vpn Troubleshooting Tips - ZyXEL Communications SBG5500 Series User Manual

Table 75 Configuration > VPN > PPTP VPN
LABEL
WINS Server (Optional)
Apply
Reset

10.6.1 PPTP VPN Troubleshooting Tips

This section lists the common troubleshooting tips for PPTP VPN.
A PPTP client device (such as a PC, smart phone, tablet) cannot connect to the SBG.
1
TIP: This could be due to one of the following reasons:
a. The client device is not connected to the Internet successfully.
Action: Check the client device's Internet connection.
b. Incorrect server address configured on the client device.
(1) If the Local WAN Interface is "Any":
(2) If the Local WAN Interface is an interface (IP address shown to the right):
Use that IP address for the client device to connect.
c. The WAN interface which the SBG's PPTP VPN is using is not connected.
Action: From the SBG's GUI, click Status. Check if the WAN interface the client device is connected has
an IP address present.
d. The PPTP VPN is not enabled.
Action: From the SBG's GUI, click VPN > PPTP VPN. Check Enable check box and click Apply.
e. PPTP is not configured correctly on the client device.
Action: Check the PPTP VPN configuration on the client device.
f. The client entered an incorrect username or password.
Action: From the SBG's GUI, click Maintenance > User Account. The client should use one of the
accounts to make the connection.
g. The SBG has already reached the maximum number of concurrent PPTP VPN connections.
Action: There are too many clients connected. Wait a while and then retry.
A PPTP client is disconnected unexpectedly.
2
Tip: A PPTP connection will be dropped when one of the followings occurs on the SBG:
Chapter 10 VPN
DESCRIPTION
The WINS (Windows Internet Naming Service) server keeps a mapping table of the
computer names on your network and the IP addresses that they are currently using.
Type the IP addresses of up to two WINS servers to assign to the remote users.
Click Apply to save your changes back to the SBG.
Click Reset to restore your previous settings.
SBG5500/3310 Series User's Guide
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