Hi Everyone,
I would like seek an assistance with regards designing a redundant ISP in a data center. I already simulate this in a simulation gns3 and it didn't work. I hope can someone suggest or recommend a design.
1. I have a two ISP
2. The design has a 2 VRRP Firewall
3. The firewall has a NAT configuration.
4. The server was static NAT also in a ISP1 and the other one ISP2.
5. The default route was in ISP 1.
Now the issue comes in, when the outsider contact the server using the NAT in ISP2 the packet will be accepted and it will traversing to the private IP of the server. And then the private IP server will reply back by using the default route which is ISP1,
Question
is there a way in firewall that the firewall will able to know the packet was came in ISP2 and will reply using the ISP2 (which where it came) ?