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I want to set up a home VPN, and I had planned to use DD-WRT to do it. The problem is that our current router isn't supported by DD-WRT. Our previous router is supported by DD-WRT, and I have already installed the firmware on that router. The problem is that for a few reasons, we need to use the router that doesn't support DD-WRT as our primary router. What I'm wondering is: is it possible to set up a DD-WRT router as an access point on an existing network not run by a DD-WRT router, and then still use that router to set up a home VPN?

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closed as not a real question by Ƭᴇcʜιᴇ007, Simon Sheehan, 8088, ChrisF, Nifle Nov 25 '12 at 18:06

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

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Yes. Just make sure to do these things:

  1. Disable WAN support in the DD-WRT router. Either configure it to bridge the WAN port to its LAN (converting it into another LAN port) or don't use the WAN/Internet port.

  2. Connect a LAN port on one router to a LAN port on the other.

  3. Disable the DHCP server in the DD-WRT router.

  4. Configure the DD-WRT router's LAN IP to a valid IP inside the subnet, ideally one outside the other router's DHCP range. Set its default gateway to the IP address of the other router.

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For the last step: "Set its default gateway to the IP address of the other router", do you mean the local ip address, or the outside ip address? – CodeJunkie Nov 26 '12 at 2:24
@CodeJunkie: The local IP address. Your default gateway has to be on the same network as you, otherwise you'd need a gateway to reach it, and then that would be your default gateway. – David Schwartz Nov 26 '12 at 3:08

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