Same outgoing TCP source port numbers are heavily reused when a large block of the local port range is reserved

Solution Verified - Updated -

Issue

  • Same outgoing TCP source port numbers are heavily reused when a large block of the local port range is reserved
  • RHEL reuses same ports
  • We have problems with our RHEL acting as client because remote server is not accepting some of our connection request because the remote is still in TIME_WAIT state and we are reusing same port.

Environment

  • Red Hat Enterprise Linux 7
  • TCP (Transmission Control Protocol)
  • Large number of net.ipv4.ip_local_reserved_ports covering net.ipv4.ip_local_port_range

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