I introducted kcptun protocol to accelerate from vps to my computer,but how to up speed from other website to our vps?Because kcptun is suit terminal to anther terminal,so we need bbr protocol.

#CentOS 6系统
#导入ELRepo公钥
wget https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
rpm --import RPM-GPG-KEY-elrepo.org
#安装ELRepo
rpm -Uvh http://www.elrepo.org/elrepo-release-6-8.el6.elrepo.noarch.rpm
#升级最新内核
yum --enablerepo=elrepo-kernel install kernel-ml -y
#调整内核启动顺序
sed -i '/default=/d' /boot/grub/grub.conf && echo -e "\ndefault=0\c" >> /boot/grub/grub.conf 
#重启
reboot

#CentOS 7系统
#导入ELRepo公钥
wget https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
rpm --import RPM-GPG-KEY-elrepo.org
#安装ELRepo
rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-3.el7.elrepo.noarch.rpm
#升级最新内核
yum --enablerepo=elrepo-kernel install kernel-ml -y
#调整内核启动顺序
grub2-mkconfig -o /boot/grub2/grub.cfg && grub2-set-default 0
#重启
reboot
#查看最新内核,如果大于4.9,则进行下一步
uname -r
#修改配置
cat >>/etc/sysctl.conf << EOF
net.core.default_qdisc=fq
net.ipv4.tcp_congestion_control=bbr
EOF
#使配置生效
sysctl -p
#检查生效,输出带有tcp_bbr 20480  0即生效
lsmod | grep bbr