使用PowerShell 测试DNS

运行环境：Windows Server 2012 R2

获取服务器DNS命令，下面的仅获取一个dns

(nslookup sql.ciras.com)[1].split(':')[1].trim()

此脚本用来验证DNS是否正常，实际原理就是ping域名的ip

先ping域名

再解析域名的ip地址

判断域名是否解析域名是否为多个ip

若为多个ip，则再次ping文件中给的ip地址

最后输出表格

# 验证DNS是否能ping通
# author:lttr <www.cnblogs.com/GoCircle> 
# date:2019-08-09
# eg.
# C:\Users\0\Desktop\TestDNS.ps1

# 获取当前脚本绝对路径
$path = Split-Path -Parent $MyInvocation.MyCommand.Definition;
$file = "\域名及ip列表.txt";
# 读取txt文件获取列表信息
[array]$dnslist = (get-content -Path ($path + $file))

$sourcecount = $dnslist.Length-1
for($i=1;$i -le $sourcecount;$i++){
    Write-Progress -Activity "正在检测DNS列表" -PercentComplete ($i/$sourceCount*100) -Status "Step $i of $sourcecount"
    $dnsip = ($dnslist[$i]  -split ",")[1]
    $flage = Test-NetConnection ($dnslist[$i]  -split ",")[0] -Hops 1 -InformationLevel Quiet -ErrorAction SilentlyContinue -WarningAction silentlyContinue
    $dnsresult = Resolve-DnsName -Name ($dnslist[$i] -split ",")[0] -ErrorAction SilentlyContinue
    if($dnsresult.IPAddress.count -gt 1){
        $flage = Test-NetConnection $dnsip -Hops 1 -InformationLevel Quiet -ErrorAction SilentlyContinue -WarningAction silentlyContinue
    }
    [PSCustomObject]@{
        域名 = ($dnslist[$i]  -split ",")[0].ToUpper() + "  "
        DNS状态 = Switch($DNSLookupObject){
            {!$flage}{"Ping失败  "}
            {$flage -and !($dnsresult.IPAddress -Match $dnsip)}{"IP不一致  "}
            {$flage -and $dnsresult.IPAddress -Match $dnsip}{"成功  "}
        }
        txt中IP地址 = $dnsip + "  "
        Connection_IP地址 = $(if($flage){$dnsresult.IPAddress})
    }
}

附带的txt文件格式

输入格式【域名,IP】（中间使用英文逗号分隔），请保留本行且不能包含空行。
www.baidu.com,127.0.0.1
www.baidu.com,127.0.0.2
www.baidu.com,127.0.0.3
www.baidu.com,127.0.0.4