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Improve sysctl settings

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hwdsl2 2022-10-31 01:30:18 -05:00
parent 6c1d25897f
commit 6bdb4cc635
1 changed files with 14 additions and 13 deletions
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27
openvpn-install.sh
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@ -48,32 +48,33 @@ find_public_ip() {
}
update_sysctl() {
mkdir -p /etc/sysctl.d
conf_fwd="/etc/sysctl.d/99-openvpn-forward.conf"
conf_opt="/etc/sysctl.d/99-openvpn-optimize.conf"
# Enable net.ipv4.ip_forward for the system
echo 'net.ipv4.ip_forward=1' > /etc/sysctl.d/99-openvpn-forward.conf
echo 'net.ipv4.ip_forward=1' > "$conf_fwd"
if [[ -n "$ip6" ]]; then
# Enable net.ipv6.conf.all.forwarding for the system
echo "net.ipv6.conf.all.forwarding=1" >> /etc/sysctl.d/99-openvpn-forward.conf
echo "net.ipv6.conf.all.forwarding=1" >> "$conf_fwd"
fi
# Optimize sysctl settings such as TCP buffer sizes
cat > /etc/sysctl.d/99-openvpn-optimize.conf <<'EOF'
kernel.msgmnb = 65536
kernel.msgmax = 65536
net.core.wmem_max = 16777216
net.core.rmem_max = 16777216
net.ipv4.tcp_rmem = 4096 87380 16777216
net.ipv4.tcp_wmem = 4096 87380 16777216
EOF
base_url="https://github.com/hwdsl2/vpn-extras/releases/download/v1.0.0"
conf_url="$base_url/sysctl-ovpn-$os"
[ "$auto" != 0 ] && conf_url="${conf_url}-auto"
wget -t 3 -T 30 -q -O "$conf_opt" "$conf_url" 2>/dev/null \
|| curl -m 30 -fsL "$conf_url" -o "$conf_opt" 2>/dev/null \
|| { /bin/rm -f "$conf_opt"; touch "$conf_opt"; }
# Enable TCP BBR congestion control if kernel version >= 4.20
if modprobe -q tcp_bbr \
&& printf '%s\n%s' "4.20" "$(uname -r)" | sort -C -V; then
cat >> /etc/sysctl.d/99-openvpn-optimize.conf <<'EOF'
cat >> "$conf_opt" <<'EOF'
net.core.default_qdisc = fq
net.ipv4.tcp_congestion_control = bbr
EOF
fi
# Apply sysctl settings
sysctl -e -q -p /etc/sysctl.d/99-openvpn-forward.conf
sysctl -e -q -p /etc/sysctl.d/99-openvpn-optimize.conf
sysctl -e -q -p "$conf_fwd"
sysctl -e -q -p "$conf_opt"
}
new_client() {