The company has two Synology NAS as backup devices，One of them is a remote backup for the other，This is achieved through the Hyper Backup package provided by Synology。Because the amount of data backed up is not small，So if there are some unexpected situations，May cause backup jobs to fail to complete at night，And affects the bandwidth during the day。
Ask colleagues to help after research，DiskStation Manager can limit the speed of the specified port traffic，The following is the setting method：
◎ In DiskStation Manager, click "Control Panel"-"Network"-"Flow Control" in order，Click “New”。
◎ Since the port used by Hyper Backup is not built-in service list，So choose "Custom"。
◎ From the officialfileYou can find the ports that Hyper Backup will use are TCP 6281、22、873，Actually I used 6281，Complete import import "confirm"。
◎ Enter the bandwidth you want to limit and press "OK"。
◎ After returning to the main page of "Flow Control"，Will just set the rules “Tick”，And click "Save" above，To take effect。
【參考連結】
- What network ports does Synology service use? | Synology Inc. Synology Inc.
