edit and copy-paste at the end of the file /etc/sysctl.conf net.ipv4.tcp_no_metrics_save=1 net.core.rmem_default=65536 net.core.wmem_default=65536 net.core.rmem_max=52428800 net.core.wmem_max=52428800 net.ipv4.tcp_rmem = 8192 750000 52428800 net.ipv4.tcp_wmem = 8192 750000 52428800 net.ipv4.tcp_reordering=20 net.ipv4.tcp_timestamps=1 net.ipv4.tcp_window_scaling=1 net.ipv4.tcp_sack=0 net.ipv4.tcp_moderate_rcvbuf=1 net.ipv4.tcp_congestion_control = cubic net.ipv4.tcp_adv_win_scale=9 save file, exit and reboot your machine 🙂 p.s. tnx to Popaj