feat: add sysctl tuning

setup.sh

@@ -252,6 +252,21 @@ configure_logrotate() {
 EOF"
 }
 
+configure_sysctl() {
+  run "Configuring sysctl parameters" bash -c "tee /etc/sysctl.d/90-vrbee.conf >/dev/null <<'EOF'
+net.core.default_qdisc = fq
+net.ipv4.tcp_congestion_control = bbr
+net.core.rmem_max = 16777216
+net.core.wmem_max = 16777216
+net.ipv4.tcp_rmem = 4096 87380 16777216
+net.ipv4.tcp_wmem = 4096 65536 16777216
+net.core.netdev_max_backlog = 16384
+net.ipv4.tcp_max_syn_backlog = 16384
+net.ipv4.ip_local_port_range = 10000 65535
+EOF"
+  run "Applying sysctl parameters" bash -c "sysctl --system >/dev/null"
+}
+
 install_netbird() {
   [[ -z "$NETBIRD_KEY" ]] && return
   run "Waiting for apt lock" wait_for_apt
@@ -350,6 +365,7 @@ setup_role() {
 
 main() {
   install_packages
+  configure_sysctl
   setup_timezone
   create_user
   configure_ssh