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Netgear Site-Site IPsec VPN - Can't ping past gateway!


i have a setup with 2 x Netgear FVS318N routers connecting two offices via an IPsec VPN tunnel.

I can ping the gateway's LAN IP from location to location, however I cannot ping any nodes past the gateway

VPN Setup is like this

FQDN: klmelbourne.smbnetworks.com.au

Remote Office:
FQDN: klspringvale.smbnetworks.com.au

Each office has an ADSL Modem setup in bridge mode, which then connects to the WAN port on the FVS318N router.

I can ping (the FVS318N) from Remote Office.
I can ping (the FVS318N) from Head-Office.

But thats it.
1 Solution
Check for firewall rules denying ICMP. If not readily apparent, try adding a rule to allow ICMP service between the two networks via the VPN tunnel.

Make sure to properly reference the zones correctly. The subnet that is remote relative to another subnet is in the VPN zone whereas the local is in the LAN zone.

Also check how the VPN tunnel is setup. Is it possible that the VPN tunnel is defined/configured in such a way that confuses the remote internal gateway address for the remots subnet address. I have seen that in the past and the result is as you describe.

 - Tom
Erik BjersPrincipal Systems AdministratorCommented:
I have not done a VPN with Netgear in many many years but I have created them with many other platforms.  I can not tell you exactly what setting to check on your Netgear but I can try to point you in the right direction.

To me this seems like an issue with either routing on your internal networks or with the VPN configuration so I will give you a few things to check,

1) Look at the FVS318s at either end and check the VPN configuration to make sure that the remote and local networks are set to the subnet and not to an individual IP, for instance /24 and not /36.

2) If you have more than one subnet behind either side of the VPN check your internal routing device and make sure it is forwarding traffic for the Subnets on the other side of the VPN to the FVS318

Good luck

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