OpenVPN Support Forum

Posted: **Fri Dec 25, 2020 5:17 am**

Hi All,
I am seeing a strange entry on the logs. I am trying to get OpenVPN gping on OmniOS and I am having two difficulties. One is that in the logs I am seeing
"using 160 bit message hash 'SHA1' for hmac authentication. This is strange because in the vars file, I selected EASYRSA_DIGEST "sha512" so I can't figure why it's still using sha1. Can anyone help me out please?

Posted: **Fri Dec 25, 2020 6:08 am**

Ouch. My bad. Sorry. I just realized i missed "auth SHA512" in the server.conf file.

Posted: **Fri Dec 25, 2020 3:50 pm**

Just so you understand, using SHA512 is wasting CPU cycles on your VPN nodes.

--auth SHA1 (The default) is absolutely all you need as the Auth HMAC.

Posted: **Thu Dec 31, 2020 8:13 am**

Thanks for that reminder. That is true.

OpenVPN Support Forum

OpenVPN using SHA1 instead of SHA512

OpenVPN using SHA1 instead of SHA512

Re: OpenVPN using SHA1 instead of SHA512 [SOLVED]

Re: OpenVPN using SHA1 instead of SHA512

Re: OpenVPN using SHA1 instead of SHA512