User Manual
28 Chapter 14: FAQ
Network
Why can’t I access the Internet?
• Make sure your wireless device is not banned under Trac Control.
• Go to Network Center > Status > Internet Connection, and check if the status is "Connected".
Why is the upload/download trac slow?
• If Trac Control is enabled, network speed promotion will be disabled and general transmission speed may
be lower. To disable Trac Control, go to Network Center > Trac Control > Advanced > Settings for
management.
• Check if your device's custom speed settings have been modied. Go to Network Center > Trac Control >
General and click the Custom speed icon to modify the settings.
• If you have created a large number of rewall or port forwarding rules, your network transmission performance
may become slower. To remove rewall rules, go to Network Center > Security > Firewall. To remove port
forwarding rules, go to Network Center > Port Forwarding > Port Forwarding.
What can I do if port-forwarding doesn't work properly?
• Go to Network Center > Port Forwarding > DMZ, enable DMZ, and specify the DMZ host IP address. Then,
see if the devices in the DMZ can be accessed from the Internet. As a specialized form of port forwarding, DMZ
helps you nd out whether the problem lies in port forwarding itself.
• If rewall is enabled on the router, suspend the rewall function for a while.
• Contact the ISP to know if the service port is blocked for any reason.
Why can't I nd my router via router.synology.com?
• You can only access your router via router.synology.com when the enquiring device is in the router's local
network.
• Make sure the enquiring device (e.g. your PC) and the router are well-connected to each other via network
cables or Wi-Fi connection.
• Re-connect your PC to the original port or anothe port on the router in case of poor contact between the
network cable and the port socket.
• Simplify the network conguration by connecting your router and the PC directly, without hubs/switches in
between, and try again.
Why do I have abnormal incoming/outgoing trac?
• Go to Network Center > Trac Control > Monitor, and select Enable trac statistics and Enable
application detection to check which device/application overuses network bandwidth. Locate the device/
application in question and disconnect/stop it.
• Go to Security Advisor and perform system scan to see if there is any malware overusing the network
bandwidth.
Does the router have SPI rewall?
Yes. In SRM, the SPI rewall is always enabled by default so no related management options are provided.
Can the VPN Server package work on my router if I use IPv6 connection?
If the router provides IPv6 connection, you can only use VPN Server as an OpenVPN server. The other types of
VPN (i.e. PPTP and L2TP/IPSec) are not supported under an IPv6 environment.
What can I do if I can't connect to the router via VPN connection?
Make sure you enable the VPN pass-through function and select the corresponding options of the VPN protocols
(PPTP, L2TP, IPSec) that you use.