I have 2 Draytek Vigor 2830's set up with a IPSec VPN between the two which is working. Yet I can only ping the router in HQ (10.0.0.9) & the IPCortex (10.0.0.2), the outline below might help.
HQ Remote Office
Local Network 10.0.0.0 10.0.10.0
Router 10.0.0.9 (Gateway for IPCortex) 10.0.10.1
10.0.0.1 (Gateway for rest of network)
IPCortex 10.0.0.2
In HQ the IPCortex SIP box uses 10.0.0.9 as its gateway the rest of the HQ network uses 10.0.0.1. The DHCP server runs on 10.0.0.1 for the HQ network, and in the site office 10.0.10.1 runs a DHCP as well.
From the site office, I can ping 10.0.0.9 & 10.0.0.2 fine. If I try and ping anything else it just doesn't go anywhere. Traceroute from Site Office PC shows 10.0.10.1 --> 10.0.0.9 --> Request timed out. HQ Router (10.0.0.9) Ping diagnosis reaches IP's other than 10.0.0.2 but the Site Office Router (10.0.10.1) will only reach 10.0.0.2.
Any ideas?