Does the "net.ipv4.ip_local_port_range" parameter setting have any relation to FTP port settings?

Solution Unverified - Updated -

Issue

  • Even though net.ipv4.ip_local_port_range = 32768-60999 is set, FTP (passive mode) still utilizes ports above 61000.
  • Is the net.ipv4.ip_local_port_range parameter not associated with the allocation of FTP (passive) data transfer ports?
  • The issue was resolved by restricting the port range in the vsftpd.conf file or opening up firewall ports.
  • Provide a comprehensive explanation of the net.ipv4.ip_local_port_range parameter.

Environment

  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8

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