Help! Routing to an IP Address based on Source IP Address

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    Arrie44
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    #128184

    This isn’t a VPN question, just routing.
    OK here’s my situation, this is a good one…

    My company is a group of banks. Endusers at these different banks access a federal banking website (171.203.0.2). They access the Internet through the centralized datacenter, not locally.

    To access the website, the federal bank requires that each bank go through a seperate VPN device that sets up a secure IPSec tunnel to the website. The INTERNAL IP addresses of those VPN devices are as follows:

    VPN_BankA: 172.16.5.215
    VPN_BankB: 172.16.5.216
    VPN_BankC: 172.16.5.217
    VPN_BankD: 172.16.5.218
    VPN_BankE: 172.16.5.219
    VPN_BankF: 172.16.5.220
    VPN_BankG: 172.16.5.221

    Each bank has it’s own subnet, like so:

    BankA: 10.32.0.0/16
    BankB: 10.33.0.0/16
    BankC: 10.34.0.0/16
    BankD: 10.35.0.0/16
    BankE: 10.36.0.0/16
    BankF: 10.37.0.0/16
    BankG: 10.38.0.0/16

    SO….the goal is to route the packets going to the website (171.203.0.2) to the right VPN device based on the subnet the packet is coming from. I also need to perserve the source and destination IPs in the packet (no NATing).

    This can probably get done with some policy based routing but I’m not that smart, you guys are. Help a brother!

    Thanks,
    Arrie

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