A free, professional-grade TFTP server.
Error: Packet dropped.
Press the , type wf.msc , and press Enter to open Advanced Security Firewall. Click on Inbound Rules in the left sidebar. Click New Rule... in the right sidebar. Choose Program and click Next. Browse to the path of your 3CDaemon.exe and click Next. Select Allow the connection and click Next. 3cdaemon windows 11
While 3CDaemon remains operational under Windows 11, it is critical to acknowledge its security limitations. The software does not support modern, secure protocols such as SFTP (SSH File Transfer Protocol), SCP, or secure cryptographic logging. A free, professional-grade TFTP server
Rarely, Windows 11’s Hyper-V/Containers may conflict with raw socket access. If TFTP transfers fail, test by temporarily disabling under Device Security → Core isolation details . Re-enable after testing. Click on Inbound Rules in the left sidebar
Windows 11 will automatically block 3CDaemon’s network ports by default. You must manually create inbound rules to allow traffic through. Required Ports UDP Port 69 FTP Server: TCP Port 21 (and Port 20 for data) Syslog Server: UDP Port 514 How to Allow 3CDaemon Through the Firewall