Re: [Openvpn-users] [ext] WARNING: 'auth' is used inconsistently, local='auth [null-digest]', remote='auth SHA256'

[Ralf H. <Ral...@ch...>]

* Ralf Hildebrandt <Ral...@ch...>:

> 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
ral...@ch...
https://www.charite.de