Zeroshell VPN key security

Forums Network Management ZeroShell Zeroshell VPN key security

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  • #44800

    I was restarting my LAN-to-LAN VPN connection and saw such messages in log:

    WARNING: INSECURE cipher with block size less than 128 bit (64 bit). This allows attacks like SWEET32. Mitigate by using a --cipher with a larger block size (e.g. AES-256-CBC).

    Is it really true, that I am using only 64-bit VPN-key? How to find out?

    If really true, why is key length not configurable in Zeroshell?

    How to use AES256 NOW?

    It is year 2017, 64-bit keys were considered insecure even 10 years ago…


    I did add to all my VPN-link Parameters: –cipher AES-256-CBC

    Did I do the right thing? Am I using AES256 now?

    At least it did disconnect current VPN tunnels and did not come back up, unless both sides were configured with –cipher AES-256-CBC

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