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Affected Branches:
MOODLE_24_STABLE, MOODLE_25_STABLE, MOODLE_26_STABLE
Fixed Branches:
MOODLE_24_STABLE, MOODLE_25_STABLE
Pull from Repository:
https://github.com/brki/moodle
Pull Main Branch:
master-~~MDL-39409~~-auth-cas-use-moodle-web-proxy
Pull Main Diff URL:
https://github.com/brki/moodle/commit/5c8535dceaeceb40ec5256bfc50b4e38cd204f9a
Testing Instructions:

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1. Configure Moodle to use CAS authentication, and test that it's working
2. Configure Moodle to use a proxy for it's web traffic
3. Ensure that Moodle can only communicate with the outside world via the proxy (e.g. configure a firewall so that outward communication is blocked except to the proxy server)
4. Test without the fix: CAS authentication will fail
5. Test with the fix: CAS authentication will succeed

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1. Configure Moodle to use CAS authentication, and test that it's working 2. Configure Moodle to use a proxy for it's web traffic 3. Ensure that Moodle can only communicate with the outside world via the proxy (e.g. configure a firewall so that outward communication is blocked except to the proxy server) 4. Test without the fix: CAS authentication will fail 5. Test with the fix: CAS authentication will succeed

Under Site Administration -> Server -> HTTP you can configure a web proxy to use.

CAS authentication will fail if the server is firewalled and does not use the configured web proxy.

The CAS module uses the phpCAS library, which uses curl. The appropriate proxy-related curl settings need to be set.

The solution is fairly simple.

caused a regression

MDL-50129 Bug detected in auth/cas plugin

Participants:: Andrew Davis, Brian King, Damyon Wiese, Dan Poltawski, Eloy Lafuente (stronk7), Iñaki Arenaza, Michael de Raadt, Petr Skoda