: Winbox uses TCP port 8291 for standard connections and UDP port 20561 for MAC-based discovery. Ensure these are open in your computer's firewall.
Newer Winbox versions (4.x and above) have dropped support for very old RouterOS releases. If you are managing a router running RouterOS 6.30 or earlier, the latest Winbox may fail to connect or display corrupted menus. Winbox 3.14 is known to work flawlessly with RouterOS versions as early as v5.x and v6.x up to v6.40. Winbox 3.14 Download