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Nat question - Masq or SNAT

Louis-M

I have 4 internal lans:

LAN A = 10.1.1.0/24
LAN B = 10.1.2.0/24
LAN C = 10.1.3.0/24
LAN D = 10.1.4.0/24

I have 3 WAN's:

WAN A = 1.1.1.1
WAN B = 2.2.2.2
WAN C = 3.3.3.1/29  (goes to 192.168.1.0/24 via 3.3.3.2/29)

I want to nat all LAN's to various WAN's

LAN A >>> WAN A (using Masquerade)
LAN B >>> WAN B (using Masquerade)
LAN C >>> WAN C (using Masquerade)

I want LAN D >>> WAN C (using Masquerade)

However, I also want LAN A to nat to WAN C when a user tries to get to 192.168.1.0/24

Bear in mind that LAN A already has a masq rule to WAN A



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    Think I've done it but unfortunately, I don't have access to the other end of WAN C to see what is hitting it ie is it the masq ip or the actual source ip?

    My understanding of this is:

    It doesn't matter what is on the LAN side of WAN C. Everything coming out of LAN C will appear to come from 3.3.3.1

    So a client on LAN A (10.1.1.0/24) will appear as 1.1.1.1 coming out of WAN A but will also appear as 3.3.3.1 if it is routed to WAN C to reach another another network.

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  • 0

    Think I've done it but unfortunately, I don't have access to the other end of WAN C to see what is hitting it ie is it the masq ip or the actual source ip?

    My understanding of this is:

    It doesn't matter what is on the LAN side of WAN C. Everything coming out of LAN C will appear to come from 3.3.3.1

    So a client on LAN A (10.1.1.0/24) will appear as 1.1.1.1 coming out of WAN A but will also appear as 3.3.3.1 if it is routed to WAN C to reach another another network.

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