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40a686ca84
This is a regression test for the bug in python-kdcproxy mentioned in https://github.com/latchset/kdcproxy/pull/44 When the reply from AD is split into several TCP packets the kdc proxy software cannot handle it and returns a false error message indicating it cannot contact the KDC server. This could be observed as login failures of AD user on IPA clients when: * IPA client was configured to use kdcproxy to communicate with AD * kdcproxy used TCP to communicate with AD * response from AD to kdcproxy was split into several packets This patch also refactors and improves existing tests: * switch to using pytest fixtures for test setup and cleanup steps to make them isolated and reusable * simulate a much more restricted network environment: instead of blocking single 88 port we now block all outgoing traffic except few essential ports * add basic tests for using kdcproxy to communicate between IPA client and AD DC. Reviewed-By: Anuja More <amore@redhat.com>