TFTP "Transfer timed out" with firewalld tftp-client service

Solution Verified - Updated -

Issue

  • We are facing an issue while accessing TFTP server, getting Transfer timed out. error while put and get. it's working after disabling the firewall.
  • Facing TFTP connectivity issue.
  • TFTP, as a client, is not working. Packet captures show ICMP rejection of server reply packets

Environment

  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 7
  • firewalld firewall with tftp-client service
  • TFTP (Trivial File Transfer Protocol) client connecting to a remote TFTP server

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