Hello, we have a Samba server setup on Debian Buster using Louis? packages: Version 4.13.2-Debian The server has a Xeon-E3 and a BTRFS RAID?10 over 4 SATA hard disks. Clients connect through WireGuard VPN. I have no problems reaching client line speed using iPerf3 in or outside the VPN tunnel. Using it makes hardly any difference. What bothers me/us is that SMB speed is very slow. Uploadwise I can reach nearly line speed (in my case 20?40 Mbit/s) but download reaches a max of 60?70 Mbit/s (line 300 Mbit/s). I wonder if there are any options one could set to improve SMB transfer rates over WAN. I did set: socket options = IPTOS_THROUGHPUT use sendfile = yes min receivefile size = 16384 getwd cache = true aio is on raw read/write too Any tips for me? Regards, Alexander