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ActiveSocket - DnsServer and DnsRecord Objects
DNS is the Domain Name System. DNS converts machine names to the IP addresses that all machines on the net have. It translates (i.e. 'maps') from name to address and from address to name, and some other things.
The ActiveSocket DNS objects can be used to query servers running a domain name service (DNS) application. It will send domain name query packets to any designated DNS server. There are three data elements required in order to formulate a DNS query using ActiveSocket:
- DNS servername/address
- Internet style address that is being queried
- Type of record you are searching for
The Dns objects are part of the ActiveSocket component. Overview of all ActiveSocket objects:
» Icmp
» Http
» Ftp & FtpFile
» DnsServer & DnsRecord
» Ntp
» Ssh
» Rsh
» SnmpManager
» SnmpTrapManager
» SnmpMibBrowser
» Tcp
» Udp
» IPtoCountry
» Wake-on-LAN
Dns Sample code
VBScript sample: Query a DNS server for all records of a given domain name
Set objDnsServer = CreateObject ( "ActiveXperts.DnsServer") ' Create object
Set objConstants = CreateObject ( "ActiveXperts.ASConstants")
objDnsServer.Host = "ns1.interstroom.nl" ' DNS server
objDnsServer.Lookup "activexperts.com", objConstants.asDNS_TYPE_ANY ' Show all DNS records
WScript.Echo "Lookup, result: " & objDnsServer.LastError
If( objDnsServer.LastError <> 0 ) Then
WScript.Quit
End If
If ( objDnsServer.IsAuthoritative = True ) Then
WScript.Echo "Server is an authority for this domain"
Else
WScript.Echo "Server is not an authority for this domain"
End If
Set objDnsRecord = objDnsServer.GetFirstRecord ' Iterate over all records; get first
While ( objDnsServer.LastError = 0 )
Select Case objDnsRecord.Type
Case objConstants.asDNS_TYPE_A
WScript.Echo "Type : A"
WScript.Echo "Name : " & objDnsRecord.Name
WScript.Echo "IPv4 Address : " & objDnsRecord.Address
Case objConstants.asDNS_TYPE_AAAA
WScript.Echo "Type : AAAA"
WScript.Echo "Name : " & objDnsRecord.Name
WScript.Echo "IPv6 Address : " & objDnsRecord.Address
Case objConstants.asDNS_TYPE_CNAME
WScript.Echo "Type : CNAME"
WScript.Echo "Name : " & objDnsRecord.Name
WScript.Echo "Alias : " & objDnsRecord.Address
Case objConstants.asDNS_TYPE_MX
WScript.Echo "Type : MX"
WScript.Echo "Name : " & objDnsRecord.Name
WScript.Echo "Preference : " & objDnsRecord.Preference
WScript.Echo "Mail Exchange : " & objDnsRecord.MailExchange
Case objConstants.asDNS_TYPE_NS
WScript.Echo "Type : NS"
WScript.Echo "Name : " & objDnsRecord.Name
WScript.Echo "Name Server : " & objDnsRecord.NameServer
Case objConstants.asDNS_TYPE_PTR
WScript.Echo "Type : PTR"
WScript.Echo "Name : " & objDnsRecord.Name
WScript.Echo "Host : " & objDnsRecord.Address
Case objConstants.asDNS_TYPE_SOA
WScript.Echo "Type : SOA"
WScript.Echo "Name : " & objDnsRecord.Name
WScript.Echo "Name Server : " & objDnsRecord.NameServer
WScript.Echo "MailBox : " & objDnsRecord.MailBox
WScript.Echo "Serial : " & objDnsRecord.SerialNumber
WScript.Echo "Refresh : " & objDnsRecord.RefreshInterval
WScript.Echo "Retry Interval : " & objDnsRecord.RetryInterval
WScript.Echo "Expiration Limit : " & objDnsRecord.ExpirationLimit
WScript.Echo "Minimum TTL : " & objDnsRecord.MinimumTTL
End Select
WScript.Echo "TTL : " & objDnsRecord.TTL
WScript.Echo
Set objDnsRecord = objDnsServer.GetNextRecord ' Iterate over all records; get next
Wend
On ftp.activexperts-labs.com, you can find a lot of ActiveSocket samples. These samples are also part of the ActiveSocket installation.
» Visit ftp.activexperts-labs.com
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