Oxygen VDSL modem/router setup as an OVPN client

Scripts to manage certificates or generate config files
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dentalan
OpenVPN User
Posts: 39
Joined: Thu Apr 18, 2013 8:05 pm

Oxygen VDSL modem/router setup as an OVPN client

Post by dentalan » Mon Jan 08, 2018 5:23 pm

I have setup a personal OVPN between 4 spots (4 different places) (10.8.1.0 is the server)
It used to work OK until my ISP (Cosmote/Greece) changed the modem/router with the Oxygen Gateway (It is used for VDSL over ISDN lines)
I am unable to setup static routes over LAN interface on this Device so VPN from this spot cannot work. (there is no LAN choice in the list of interfaces when setting static routes(
The Oxygen Gateway has the ability to work by itself as an SSL VPN client or server.
I select client
I uploaded the key files and crts and after enabling the service it displays that it gets an IP from the VPN server. But, there is no conectivity with the server or the other spots of the VPN.
I lookd at the logs on the VPN server and is constantly displaying the message
1515431842,N,client/87.202.44.189:38579 Authenticate/Decrypt packet error: cipher final failed
1515431842,D,client4/80.106.143.67:54334 UDPv4 WRITE [53] to [AF_INET]80.106.143.67:54334: P_DATA_V1 kid=6 DATA len=52
1515431842,D,client/87.202.44.189:38579 UDPv4 READ [149] from [AF_INET]87.202.44.189:38579: P_DATA_V1 kid=0 DATA len=148
1515431842,N,client/87.202.44.189:38579 Authenticate/Decrypt packet error: cipher final failed
1515431843,D,client4/80.106.143.67:54334 UDPv4 READ [173] from [AF_INET]80.106.143.67:54334: P_DATA_V1 kid=6 DATA len=172
1515431843,D,client/87.202.44.189:38579 UDPv4 READ [133] from [AF_INET]87.202.44.189:38579: P_DATA_V1 kid=0 DATA len=132
1515431843,N,client/87.202.44.189:38579 Authenticate/Decrypt packet error: cipher final failed
1515431843,D,client/87.202.44.189:38579 UDPv4 READ [133] from [AF_INET]87.202.44.189:38579: P_DATA_V1 kid=0 DATA len=132
1515431843,N,client/87.202.44.189:38579 Authenticate/Decrypt packet error: cipher final failed
1515431843,D,client/87.202.44.189:38579 UDPv4 READ [133] from [AF_INET]87.202.44.189:38579: P_DATA_V1 kid=0 DATA len=132
1515431843,N,client/87.202.44.189:38579 Authenticate/Decrypt packet error: cipher final failed
1515431843,D,client/87.202.44.189:38579 UDPv4 READ [133] from [AF_INET]87.202.44.189:38579: P_DATA_V1 kid=0 DATA len=132
1515431843,N,client/87.202.44.189:38579 Authenticate/Decrypt packet error: cipher final failed
1515431844,D,client/87.202.44.189:38579 UDPv4 READ [133] from [AF_INET]87.202.44.189:38579: P_DATA_V1 kid=0 DATA len=132
1515431844,N,client/87.202.44.189:38579 Authenticate/Decrypt packet error: cipher final failed

Is there a known explanation for this?
Is there a way to bypass the static routing problem of this router so to avoid this problem?

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TinCanTech
OpenVPN Protagonist
Posts: 5452
Joined: Fri Jun 03, 2016 1:17 pm

Re: Oxygen VDSL modem/router setup as an OVPN client

Post by TinCanTech » Mon Jan 08, 2018 5:40 pm

dentalan wrote:
Mon Jan 08, 2018 5:23 pm
Authenticate/Decrypt packet error: cipher final failed
Check your --cipher setting.

dentalan
OpenVPN User
Posts: 39
Joined: Thu Apr 18, 2013 8:05 pm

Re: Oxygen VDSL modem/router setup as an OVPN client

Post by dentalan » Tue Jan 09, 2018 9:04 am

Thank you, how do I do that? I do that in the key creation or at OVPN script? Any guide?

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