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I have a question that I have not found a definitive answer on, but am hoping someone here can chime in and either point me in the right direction or crush my hopes and dreams.

I have a Cisco ASA 5520 at an office. At a couple remote sites, there are linux boxes functioning as the network gateway/firewall. Is there a way to create a site-to-site VPN from one of those linux boxes to the ASA or will an investment in another ASA be required to achieve this?

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up vote 1 down vote accepted

There are several OpenSource IPsec implementations that allow you to create site-to-site VPNs with Cisco ASA firewalls.

Among them are strongSwan (I'm a developer for that project), Openswan and racoon.

If the ASA is updated to a recent firmware (at least ASA 8.4 seems to be required) you should be able to use IKEv2 together with strongSwan, which makes configuration easier than when using IKEv1.

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Those all appear to be what I am looking for! It appears I was not using good enough terminology to have these pop up in a Google search. Thanks for a quick response. I'll definitely post back once I get one up and working. –  Josh Blair Dec 13 '11 at 17:42
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