dns解锁tcp调优一些操作
退完瓦工的2c2g40G的美西还是回到了dmit。
记录一下必要的操作。
tcp调优安装
第一步
1安装 iferf3
在Debian/Ubuntu系统上安装
apt update
apt install iperf3
防火墙放行端口 (这里以ufw为例，如果你没有开启防火墙可略过这一步)
ufw allow 5201
服务端启动iperf3
iperf3 -s
windows安装服务端iperf3
下载地址
https://github.com/ar51an/iperf3-win-builds/releases/download/3.18/iperf-3.18-win64.zip
在iperf3.exe所在路径输入cmd，回车
在弹出的窗口里输入如下并敲击回车（此处为测试下行速度30s，想调整时间修改-t后的数值即可，想测上行就去掉-R）
iperf3 -c 服务端IP -R -t 30
更具返回信息看需要调高还是调低
一般Debian/Ubuntu系统的默认参数：
net.ipv4.tcp_wmem=4096 16384 4194304
net.ipv4.tcp_rmem=4096 87380 6291456
此处我们先用公式计算出一个理论值：BDP（时延带宽积）= 带宽（bps，bit/s）× 往返时延（RTT, 秒）
例：本地600Mbps，小鸡1.5Gbps，RTT170ms，取瓶颈带宽600Mbps，可以求得——600×1000×1000×0.17=102000000bit，再除以8转换为12750000byte
打开宝塔到根目录打开\etc\sysctl.conf
修改 net.ipv4.tcp_wmem="4096 16384 你的合理值(此处先用理论值)"
net.ipv4.tcp_rmem="4096 87380 同上"
————————————————————————————————————————————————————————————————————————————————————————————————————
dns解锁
这是dns分流解锁
alice 申请账号
找到给你的解锁dns
然后修改xui面板里面的xray设置
修改之前备份xray设置
{
"api": {
"services": [
"HandlerService",
"LoggerService",
"StatsService"
],
"tag": "api"},
"inbounds": [
{
"listen": "127.0.0.1",
"port": 62789,
"protocol": "dokodemo-door",
"settings": {
"address": "127.0.0.1"
},
"tag": "api"
}],
"outbounds": [
{
"protocol": "freedom",
"settings": {"domainStrategy": "UseIP"}
},
{
"protocol": "blackhole",
"settings": {},
"tag": "blocked"
}],
"policy": {
"system": {
"statsInboundDownlink": true,
"statsInboundUplink": true
}},
"routing": {
"rules": [
{
"inboundTag": [
"api"
],
"outboundTag": "api",
"type": "field"
},
{
"ip": [
"geoip:private"
],
"outboundTag": "blocked",
"type": "field"
},
{
"outboundTag": "blocked",
"protocol": [
"bittorrent"
],
"type": "field"
}
]}, "dns": {
"servers": [
"1.1.1.1","8.8.8.8",
{
"address": "***你的DNS***",
"port": 53,
"domains": [
"geosite:netflix","geosite:bahamut","geosite:hulu","geosite:hbo","geosite:disney","geosite:bbc","geosite:4chan","geosite:fox","geosite:abema","geosite:dmm","geosite:niconico","geosite:pixiv","geosite:bilibili","geosite:viu"
]
}
]},
"stats": {}
}
我的参数
net.core.default_qdisc = fq
net.core.rmem_max = 27108864
net.core.wmem_max = 27108864
net.core.somaxconn = 4096
net.ipv4.tcp_max_syn_backlog = 4096
net.ipv4.tcp_congestion_control = bbr
net.ipv4.tcp_wmem = 4096 16384 10108864
net.ipv4.tcp_rmem = 4096 87380 10108864
net.ipv4.tcp_adv_win_scale = -2
net.ipv4.tcp_sack = 1
net.ipv4.tcp_timestamps = 1
kernel.panic = -1
vm.swappiness = 0
