Manual:IP/TFTP

RouterOS has a built-in TFTP server since v3.22

• ip-address (required) - range of IP addresses accepted as clients
• req-filename - requested filename as regular expression (regex)
• real-filename - if above two values are set and valid, the requested filename will be replaced with this. If this field is empty, the req-filename will be used. If multiple regex are specified in req-filename, with this field you can set which ones should match, so this rule is validated. real-filename format for using multiple regex is filename\0\5\6
• allow (default: yes) - to allow connection if above fields are set. if no, connection will be interrupted
• read-only (default: no) - sets if file can be written to, if set to "no" write attempt will fail with error
• hits - how many times this configuration entry has been executed (viewable only)