Hi Guyz, we have setup a site to site VPN with Cisco 831 router at one end connecting to a Head-end router on the other end. The 831 is connected to a SMC7904WBRA ADSL modem. This is my own Modem and not supported by our ISP. We are using dynamic IP.
The problem is that I can browse the internet if i directly connect a pc to the ADSL router. But in the VPN setup, a debug IP shows IP reaching the headend and on its way back, gets dropped at our ISP side.
Discussions with our ISP says that they see a new session being created every few minutes by out ADSL router.
So can someone tell me what needs to be done. From what I know, this ADSL router model has NAT and SPI firewall enabled by deafult. Will disabling this solve the issue. I have NAT configured on the 831 router already.
Please advice. This technology is pretty new to me.
Thanks in advance.