topic Is is possible to have a single subnet with multiple gateways to the Internet in General Topics

Is is possible to have a single subnet with multiple gateways to the Internet

efareede — Sat, 20 Jul 2013 06:13:33 GMT

If I have hostA (10.0.0.10/24) and hostB (10.0.0.20/24) on the same private subnet, is it possible to have hostA route/forward traffic to ISP gatewayA (1.1.1.1) and hostB route/forward traffic to ISP gatewayB (2.2.2.2) using the PA device?

Re: Is is possible to have a single subnet with multiple gateways to the Internet

UhMayYeah — Sat, 20 Jul 2013 06:26:30 GMT

You can use PBF to achieve this :

HTH

Re: Is is possible to have a single subnet with multiple gateways to the Internet

HULK — Sat, 20 Jul 2013 07:25:58 GMT

Hi,

You will be able to achieve the same through PBF ( Policy based forwarding), but keep in mind as PBF decision has been taken by PBF "RULE" configured on the PA firewall, not by routing. So PBF rule can replace the routing as it is not session based. Please make sure incoming/outgoing traffic passing through the same ISP link. It will help you to avoid asymmetric-routing.

Thanks

Subhankar

Re: Is is possible to have a single subnet with multiple gateways to the Internet

efareede — Sat, 20 Jul 2013 22:45:03 GMT

I have PBF working on host B with a single service, but here's another question. How can I force all services on host B to use PBF. I tested PBF using only the http-service. If I set the policy rule to any, any for application and services, it seems to break the rule. The http request hangs. Also, if I only have the http-service enabled via PBF, and I perform execute the traceroute command on hostB, it uses ISP Gateway A and not ISP Gateway B to perfrom the traceroute.