EasyConnectFix Powershell版：用于 EasyConnect 连接到南京大学 VPN 后，删除无用路由以防止连接南大校内资源以外的流量经过校园网 VPN 而导致速度下降。

EasyConnectFix.ps1

# 用于 EasyConnect 连接到南京大学 VPN 后，删除无用路由以防止连接南大校内资源以外的流量经过校园网 VPN 而导致速度下降。
# Usage: 在 EasyConnect 连接到南京大学 VPN 后，**以管理员身份**运行此脚本。
# 子网前缀抄自 https://github.com/tangruize/NJU-EasyConnect-Script
# 缺陷；断开 EasyConnect 后，创建的路由并不会删除，这可能导致断开后访问南大网站出现异常（实测统一认证上不去了）。

$routes = Get-NetRoute -AddressFamily IPv4 | Where-Object { $_.NextHop.StartsWith("172.29") }
if ($routes.Count -eq 0) {
    Write-Host "No NJU route found! exiting..."
    exit
}
$defaultGateway = $routes[0].NextHop
$interface = $routes[0].InterfaceIndex

# remove NJU default routes first
$routes | Remove-NetRoute -Confirm:$false

# 南大IP
$subnets = "36.152.24.0/24 58.192.32.0/20 58.192.48.0/21 58.193.224.0/19 58.240.127.0/27 112.25.191.64/26 114.212.0.0/16 172.0.0.0/8 180.209.0.0/20 202.38.2.0/23 202.38.126.160/28 202.119.32.0/19 202.127.247.0/24 210.28.0.0/14 211.162.26.0/27 211.162.81.0/25 218.94.142.0/24 219.219.112.0/20 221.6.40.128/25 222.94.3.0/24 222.94.208.0/24"
$subnets += " "
# 图书馆电子资源
$subnets += "122.115.32.0/19 101.230.240.0/20 42.62.48.0/20 42.62.64.0/18 140.210.64.0/19 183.84.0.0/21 103.88.33.0/24 23.33.94.0/24 162.159.129.0/24 34.107.128.0/24 140.234.252.0/24 151.101.228.0/22 104.18.0.0/24 195.128.8.0/24 151.101.0.0/16 104.18.20.0/24 47.114.157.0/24"
$subnets = $subnets.Split(" ")

foreach ($submet in $subnets) {
    $trimmedSubnet = $submet.Trim()
    if ($trimmedSubnet.Length -eq 0) {
        continue
    }
    try {
        Get-NetRoute -DestinationPrefix $trimmedSubnet -ErrorAction SilentlyContinue | Remove-NetRoute -Confirm:$false
    } catch {}
    try {
        Get-NetRoute -DestinationPrefix $trimmedSubnet -PolicyStore PersistentStore -ErrorAction SilentlyContinue | Remove-NetRoute -Confirm:$false
    } catch {}
    New-NetRoute -AddressFamily IPv4 -DestinationPrefix $trimmedSubnet -InterfaceIndex $interface -NextHop $defaultGateway -PolicyStore ActiveStore
}