[PowerShell] 도메인 확인하기 (whois)

파워쉘로 도메인 정보를 확인할 수 있다.

 

프로필에 해당 함수를 등록하자.

 

프로필 확인 방법은 다음 포스팅을 참고하면 된다.

[IT/System Engineering] - 파워쉘 프로필 확인 및 설정

[PowerShell] 프로필 확인 및 설정

 

function Get-WhoIs {
    [CmdletBinding()]
    param(
        # The query to send to WHOIS servers
        [Parameter(Position=0, ValueFromRemainingArguments=$true)]
        [string]$query,
 
        # A specific whois server to search
        [string]$server,
 
        # Disable forwarding to new whois servers
        [switch]$NoForward
    )
    end {
        $TLDs = DATA {
          @{
            ".br.com"="whois.centralnic.net"
            ".cn.com"="whois.centralnic.net"
            ".eu.org"="whois.eu.org"
            ".com"="whois.crsnic.net"
            ".net"="whois.crsnic.net"
            ".org"="whois.publicinterestregistry.net"
            ".edu"="whois.educause.net"
            ".gov"="whois.nic.gov"
          }
        }
 
        $EAP, $ErrorActionPreference = $ErrorActionPreference, "Stop"
 
        $query = $query.Trim()
 
        if($query -match "(?:\d{1,3}\.){3}\d{1,3}") {
            Write-Verbose "IP Lookup!"
            if($query -notmatch " ") {
                $query = "n $query"
            }
            if(!$server) { $server = "whois.arin.net" }
        } elseif(!$server) {
            $server = $TLDs.GetEnumerator() |
                Where { $query -like  ("*"+$_.name) } |
                Select -Expand Value -First 1
        }
 
        if(!$server) { $server = "whois.arin.net" }
        $maxRequery = 3
 
        do {
            Write-Verbose "Connecting to $server"
            $client = New-Object System.Net.Sockets.TcpClient $server, 43
 
            try {
                $stream = $client.GetStream()
 
                Write-Verbose "Sending Query: $query"
                $data = [System.Text.Encoding]::Ascii.GetBytes( $query + "`r`n" )
                $stream.Write($data, 0, $data.Length)
 
                Write-Verbose "Reading Response:"
                $reader = New-Object System.IO.StreamReader $stream, [System.Text.Encoding]::ASCII
 
                $result = $reader.ReadToEnd()
 
                if($result -match "(?s)Whois Server:\s*(\S+)\s*") {
                    Write-Warning "Recommended WHOIS server: ${server}"
                    if(!$NoForward) {
                        Write-verbose "Non-Authoritative Results:`n${result}"
                        # cache, in case we can't get an answer at the forwarder
                        if(!$cachedResult) {
                            $cachedResult = $result
                            $cachedServer = $server
                        }
                        $server = $matches[1]
                        $query = ($query -split " ")[-1]
                        $maxRequery--
                    } else { $maxRequery = 0 }
                } else { $maxRequery = 0 }
            } finally {
                if($stream) {
                    $stream.Close()
                    $stream.Dispose()
                }
            }
        } while ($maxRequery -gt 0)
 
        $result
 
        if($cachedResult -and ($result -split "`n").count -lt 5) {
            Write-Warning "Original Result from ${cachedServer}:"
            $cachedResult
        }
 
        $ErrorActionPreference = $EAP
    }
 }
# Set-Alias whois Get-WhoIs

 

사용법은 get-whois 도메인 이다.