Routing VLANs to public IPs from Intranet through Fortigate firewall

1,545 pts.
Tags:
Firewalls
FortiGate
Internet protocol
InterVLAN Routing
ISP
Network Address Translation
Network hardware
Network security
Network security appliances
Networking
Routers
Routing and switching
Virtual LAN
We have three virtual local area networks (VLANs) as follows: 1 data, 2 voice and 3 wireless. We have 6506e at the core, and interVLAN routing is working fine. The problem is implementing FortiGate firewall in transparent mode and terminating the ISP on the router with Ethernet output. I am not able to route VLANs to public IP through Port 13. What is the best way other than through Network Address Translation (NAT)? My NAT is not working fine with VLAN to Port l3.
ASKED: February 26, 2009  11:28 PM
UPDATED: February 26, 2009  11:32 PM

Answer Wiki

Thanks. We'll let you know when a new response is added.

If I have understood your problem correctly, you are trying to reach public IPs from the Intranet through the Fortigate firewall. The firewall is in transparent mode. So all traffic that is allowed will depend upon the policies you have put in the firewall. In transparent mode the firewall is invisible to the network as all interfaces are in the same VLAN and no traffic can pass unless you apply policies. So please check this out. You can try using Port Address Translation (PAT) instead of NAT, or maybe switch to IPv6 if your applications and other OS support IPv6.

Hope this helps.

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