Server | Tftp

| Server | Platform | Features | | :--- | :--- | :--- | | | Linux (Open Source) | Supports -s (secure chroot), -c (allow new files), -l (logging), block size negotiation. | | atftpd | Linux, FreeBSD | Multi-threaded, IPv6, PXE support, runs as daemon or from inetd. | | Solarwinds TFTP | Windows (Free) | GUI, syslog integration, transfer logging, used primarily for network device backups. | | PRTG TFTP Server | Windows | Part of PRTG monitoring suite; limited to 30 sensors (free version). | | Cisco IOS | Embedded in routers/switches | tftp-server flash:config.cfg command; used for IOS upgrades and config distribution. |

/srv/tftp/ ├── pxelinux.0 ├── ldlinux.c32 ├── menu.c32 ├── pxelinux.cfg/ │ └── default ├── images/ │ ├── vmlinuz │ └── initrd.img TFTP Server

| Feature | FTP Server | TFTP Server | | :--- | :--- | :--- | | | Username & Password required | None (Anonymous only) | | Transport Protocol | TCP (Reliable, connection-oriented) | UDP (Unreliable, connectionless) | | Data Transfer | Complex commands (LIST, CD, GET, PUT) | Simple read/write requests (RRQ/WRQ) | | Port Usage | Ports 20 & 21 (plus dynamic ports) | Single port: UDP 69 | | Error Checking | Built-in (TCP guarantees delivery) | Application must handle timeouts/retries | | File Browsing | Yes (List directories) | No (Must know exact file path) | | Server | Platform | Features | |

TFTP servers are preferred in scenarios where simplicity is more critical than security: Network Booting | | PRTG TFTP Server | Windows |

) with limited memory where a full HTTP or FTP stack is too heavy. STMicroelectronics Community 3. Server Deployment & Configuration

OPTIONS="--daemon --port 69 --bind-address 0.0.0.0 /tftpboot"

An open-source, lightweight tool that is particularly useful for unbricking devices [13].