Cannot ping devices over a VPN using a fortigate and draytek

HI, I have a draytek vigor 2760 and a fortigate 60c, I have setup a site to site VPN and can ping the server. But I cannot ping anything within the business network.

Main office
Fortigate 60c on,
windows 2008 server

remote office
Draytek vigor 2760 on,

As mentioned, I have a VPN connecting the site and can ping the server, even access the folder shares from the remote office.
What I cannot do is ping the NVR unit or NAS unit.
I've checked over numerous policies, gone through the instructions I've found in various places with a fine tooth comb and still can't breach this issue.

Just after another direction to help me look in.
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Hemil AquinoNetwork EngineerCommented:
Is the VPN site to site or client to gateway?

If you can ping each site subnet such as: Default gateway an server that means your VPN has established connection.
Now, you say the can't ping the NAS, correct? I suggest the following:

1- Check your NVR unit, make sure your device is getting the right ip address.
2- If you have a cisco switch make sure the port is enable and has connectivity.
3- Ping locally  the NVR and make sure you have a reply.

Last but not least, make sure both vpn are negotiating the same authentication and encryption method.
Let me know how it goes.!
Rob WilliamsCommented:
Is the VPN router the default gateway for the problematic devices?  If not they will need a static route added to define the return path for the ping.  Often on NAS units and printers people for get to add a gateway as it is not necessary within the LAN.

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Fred MarshallPrincipalCommented:
I will assume site-to-site VPN as you said Draytek and Fortigate.

You didn't say if you're pinging the IP address or the device name.  It matters.  In a simple set of networks you would have to allow NetBIOS traffic to ping by name.

You should be able to ping the IP address without doing much of anything - as long as the devices being pinged will allow itself to respond to any ping request.
But, Windows firewall for File and Printer sharing rules includes the Echo Response rules i.e. Ping.
So, you have to allow Echo Response requests on the Incoming rules.
Also, you have to expand the Remote Address in that rule to include the remote subnet addresses.
total123Author Commented:
the default gateway was indeed the issue.
many thanks.
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