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OpenVPN authentication using " user and password" or certificate

Posted on 2015-02-08
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Last Modified: 2015-03-06
I need to authenticate some users in OpenVPN server using " user and password " + certificate authentication, and other some other user can be authenticated using certificates only. Which they can't enter users and passwords.
What the solution for that ? with keeping authentication using passwords available for some users.
How can i add user and password inside openvpn client configuration file. ? not in external file.
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Question by:LizaMoly
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Expert Comment

by:David Johnson, CD, MVP
ID: 40596894
you will probably need 2 vpn locations. One for each configuration.
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Expert Comment

by:Qlemo
ID: 40597092
One way is to use different OpenVPN servers, e.g. with different port.
You can do with an authentication script running on the server side, checking the certificate and deciding whether to use auth-user-pass, but that is more complex (never done myself).
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by:LizaMoly
ID: 40597697
How can I connect two OpenVPN servers with each other ?
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Expert Comment

by:Qlemo
ID: 40597826
Why you would like or need to do that?
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Author Comment

by:LizaMoly
ID: 40598003
I have some clients cannot enter user and password "IP phones ", which support openvpn but not support external files containing username and password. It just only accept certificate authentication. So what the solution to keep handling some users must be authenticated with user and password.
Is there any way to include username and password inside the configuration file ?
I'm thinking now to specify one server for authentication using certificates only, and the other server can authenticate using username and password + certificates.
This is my situation, Any help ??
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Expert Comment

by:Qlemo
ID: 40598284
Reread http:#a40597092, that describes both options. You do not need to "connect two OpenVPN servers with each other", they are independant.
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Author Comment

by:LizaMoly
ID: 40600163
Please Qlemo, correct the link, it's refer to this question.
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Expert Comment

by:Qlemo
ID: 40600176
Exactly - this is intentional, hence the reread.
Probably two servers (OpenVPN processes) on the same machine, but using different ports, is the best option for you.
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Author Comment

by:LizaMoly
ID: 40600418
How can i do that ? How to run two OpenVPN processes?
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Expert Comment

by:Qlemo
ID: 40601838
Like this:
pushd c:\Program Files\OpenVPN
path %PATH%;C:\Program Files\OpenVPN\bin;
start /min "OVPN Cert only" openvpn -config config\server-certonly.ovpn
start /min "OVPN auth" openvpn -config config\server-userpass.ovpn
popd

Open in new window

Each OVPN file contains the appropiate configuration commands.
You might even use two different folders for OpenVPN, to keep everything separated from each other, including CA certs. Keeping the certs different prevents from users deciding they do not need to authenticate, if they gain knowledge how to do that.
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Author Comment

by:LizaMoly
ID: 40603071
Thank you Qlemo for your help, but i use Linux, CentOS 6.5. I need the solution for linux not windows.
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Qlemo earned 500 total points
ID: 40603107
Of course, sorry. But that doesn't change much. Just make sure you use the paths as needed, and start OpenVPN as background job via &. For example
/path/to/openvpn -config /path/to/config/server-cert.ovpn &
/path/to/openvpn -config /path/to/config/server-userpass.ovpn &

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Don't know the location of binaries and data in Linux, but that should give you a start.
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Expert Comment

by:Qlemo
ID: 40618509
Why a "B" grade?
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