KORTA wrote:
Hello,
i would like to know how to resolve a problem.
I have a debian router with 3 interfaces (LAN, and two internet
providers (Provider A, Provider B)).
The default route is configured to use the provider A
The problem is that,
When an external connection arrives from provider B to an internal
server (with nat), the packet is routed to the default route:
I explain:
- A packet arrives from provider B in direction of a internal
server
- The router performs nat operation
- The internal server generates a response
- The router routes the packet on the interface Provider A
Consequently, The connection cannot been established
I want to know if its possible to configure my debian router to route
packets to the interface on which packet arrives. In the example,
packets should have been routed by the interface connected to provider B
If yes, do you know how to do that ?
Thanks.
I think tha CONNTRACK solves this problem for you, putting packets
that comes in and out, using PREROUTING and POSTROUTING.
[]s.
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