SafeNet SecureStorage appliance hangs RHEL 6.9 NFS Client

Solution Unverified - Updated -

Issue

  • RHEL NFS Client goes through a "SafeNet StorageSecure" appliance before reaching an NFS Server.
  • Sometimes the appliance closes the NFS Client TCP session with a FIN.
  • RHEL 6.8 (tested with kernel-2.6.32-642.11.1) responded to this FIN with a FIN, then re-established the TCP session quickly.
  • RHEL 6.9 (tested with kernel-2.6.32-696 and 2.6.32-696.6.3) does not respond to this FIN with a FIN, continues to send data which the appliance ACKs until the TCP Window is full then the session hangs.

Environment

  • Red Hat Enterpise Linux 6.9 (kernel-2.6.32-696.el6 series)
  • SafeNet StorageSecure NFS proxy appliance
  • NFS

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