SMB TCP vs UDP Performance

• Supermicro X9SCM-F (Gigabit LAN)
• Xeon E3-1275V2
• 32gb Ram
• Kingston SA400S37 120gb Boot SSD
• 8 x 6TB Iron Wolf NAS ST6000VN001 (Raid Z2)
• M1015 SAS card

Server Internet: 300 mb/s Down -- 20 mb/s up
Client Internet: 300 mb/s Down -- 300 mb/s up

So my main problem is getting useable speeds over remote internet access to my NAS via SMB share. So far I have been only able to achieve 20 mb/s up/down over the internet. This setup was using OpenVPN on my TP-Link AX1800...

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