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OpenVPN: IP packet with unknown IP version seen

September 23, 2016 by geekworker

While setting up a new OpenVPN, I got this message:

Sep 23 21:05:25 ascalon openvpn[18770]: krynn/aaa.bbb.ccc.ddd:xxxxx IP packet with unknown IP version=3 seen

The cause was that I had set my OpenVPN server to “dev tun”, while setting my Windows client to “dev tap” in the configuration. Changing the client to also be “dev tun” fixed the issue.

Posted in ArticleTagged openvpn
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1 Comment

  1. DaReclama says:
    December 12, 2017 at 12:44 am

    I have almose the same problem..

    IP packet with unknown IP version=0 seen

    and I am using dev tun (on both client and server)
    any ideeas?

    Reply

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