* Ralf Hildebrandt <[email protected]>:

> As far as I can see "auth SHA256" is used consistently.
> So why does it report "auth [null-digest]"?

tl;dr: client and server negotiate a GCM (Galois/Counter Mode) cipher
(AES-GCM), and those ciphers includes a HMAC, thus the specified AUTH
isn't really being used. 

https://community.openvpn.net/openvpn/ticket/816

Ralf Hildebrandt
Charité - Universitätsmedizin Berlin
Geschäftsbereich IT | Abteilung Netzwerk

Campus Benjamin Franklin (CBF)
Haus I | 1. OG | Raum 105
Hindenburgdamm 30 | D-12203 Berlin

Tel. +49 30 450 570 155
[email protected]
https://www.charite.de


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