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https://issues.apache.org/jira/browse/GUACAMOLE-197?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15854393#comment-15854393
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Michael Jumper commented on GUACAMOLE-197:
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Guacamole queries extensions in ascending order of their filenames. If you are
using multiple extensions, the first extension to return an auth failure will
take priority in the event that no extension returns success, as only one error
can be reported. Duo is probably working because it sorts earlier in the list,
while RADIUS ends up toward the end. You may need to rename the .jar file in
your GUACAMOLE_HOME/extensions/.
> Implement Support for RADIUS Authentication
> -------------------------------------------
>
> Key: GUACAMOLE-197
> URL: https://issues.apache.org/jira/browse/GUACAMOLE-197
> Project: Guacamole
> Issue Type: Improvement
> Components: guacamole, guacamole-client
> Affects Versions: 0.9.11-incubating
> Reporter: Nick Couchman
> Priority: Minor
>
> Working on implementing a RADIUS authentication module -
> guacamole-auth-radius. The basic implementation is completed - with a basic
> PAP or CHAP RADIUS server, the authentication succeeds and the user is logged
> in.
> I'm running into an issue, though, trying to implement Challenge/Response in
> RADIUS. I have my RADIUS server configured to talk to LinOTP for MFA/2FA,
> and RADIUS sends the AccessChallenge package back, asking for the second
> factor. My issue is in my continual failure to grasp the connection between
> the servlet side and the AngularJS web application. I've copied the Duo
> authentication code and tried to morph it into something that will present
> another box for the RADIUS challenge, but I can't get my controller function
> to actually fire.
> Once that is working, I'd like to support other RADIUS authentication
> protocols, like EAP-TLS and EAP-TTLS, so there's a little more work to be
> done, but right now I'm focusing on the basic protocols and the
> challenge/response.
> Will have a repo posted here in a moment for working on this.
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