Multicast traffic is not handled as expected by rp_filter in RHEL 7.3 and above

Solution Verified - Updated -

Issue

  • Since RHEL 7.3, a multicast stream which should have been discarded by rp_filter is delivered to a socket if that socket is already receiving the stream from a source rp_filter accepts.

Environment

  • Red Hat Enterprise Linux 7.4
  • Red Hat Enterprise Linux 7.3

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