Support Forum
The Forums are a place to find answers on a range of Fortinet products from peers and product experts.
New Contributor

vpn modem 3G

Hi, I need to create an IPSec VPN between head office and branches. The problem is that, in one branch I have USB 3G modem an Internet Connection. Could I use standard Site to Site vpn, or I need to use DialUp ? I don' t know (maybe you know) if modem can be configured n bridge mode to give me public IP address, which I could use as my Peer address in vpn? Or modem will give me a private IP address range? I don' t know how to deal with it. Could you explain it to me?
Valued Contributor

Hi, Most likely your ISP is natting your address, and you will not receive a public IP. So in that case you need to have a dialup connection.

FortiGate 200A/B, 224B, 110C, 100A/D, 80C/CM/Voice, 60B/C/CX/D, 50B, 40C, 30B
FortiAnalyzer 100B, 100C
FortiMail 100,100C
FortiManager VM
FortiAuthenticator VM
FortiAP 220B/221B, 11C

Contributor II

Hello, You can configure a site to site VPN, but you should use the agressive mode + NAT-T enabled and initiate the VPN from the firewall with the dynymic IP.