Reverse IP Lookup in C#/.NET
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I'm developing a firewall log monitoring application in C# with the .NET framework, and I can't figure out something. I'm trying to do a reverse lookup on an IP address. I don't mean reverse lookup to a DNS entry. I'm looking to find out the computer-name behind the IP address. The only thing I can find that's remotely related is: Dns.GetHostByName() and Dns.GetHostByAddress(). However,these methods deal with IPHost objects, which only contain DNS or IP information -- nothing about computer- name. Does anyone have any idea how to get a computer-name from an IP address in my C#/.NET application? Is there anything in .NET that will accomplish this? If so, what is it? If not, what can I call outside of .NET that I can incorporate into my application? Thanks!
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I'm developing a firewall log monitoring application in C# with the .NET framework, and I can't figure out something. I'm trying to do a reverse lookup on an IP address. I don't mean reverse lookup to a DNS entry. I'm looking to find out the computer-name behind the IP address. The only thing I can find that's remotely related is: Dns.GetHostByName() and Dns.GetHostByAddress(). However,these methods deal with IPHost objects, which only contain DNS or IP information -- nothing about computer- name. Does anyone have any idea how to get a computer-name from an IP address in my C#/.NET application? Is there anything in .NET that will accomplish this? If so, what is it? If not, what can I call outside of .NET that I can incorporate into my application? Thanks!
I don't know... Maybe trying a Interop call to NetWkstaGetInfo and passing the computer name as "\\x.x.x.x" ?? :confused: Q261186 - Computer Randomly Plays Classical Music
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I'm developing a firewall log monitoring application in C# with the .NET framework, and I can't figure out something. I'm trying to do a reverse lookup on an IP address. I don't mean reverse lookup to a DNS entry. I'm looking to find out the computer-name behind the IP address. The only thing I can find that's remotely related is: Dns.GetHostByName() and Dns.GetHostByAddress(). However,these methods deal with IPHost objects, which only contain DNS or IP information -- nothing about computer- name. Does anyone have any idea how to get a computer-name from an IP address in my C#/.NET application? Is there anything in .NET that will accomplish this? If so, what is it? If not, what can I call outside of .NET that I can incorporate into my application? Thanks!
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This is on a windows network? There is the WNet api in the PlatformSDK. You might be able to import functions from the windows networking DLL's to access windows networking information like computer names (wouldn't that be NetBIOS?).
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No, this is not specific to a Windows network. I need to be able to get the "computer name" of any in-coming IP address to the firewall. Basically, I want my app to be able to do what a NSLOOKUP call does. Get what I mean?
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I'm developing a firewall log monitoring application in C# with the .NET framework, and I can't figure out something. I'm trying to do a reverse lookup on an IP address. I don't mean reverse lookup to a DNS entry. I'm looking to find out the computer-name behind the IP address. The only thing I can find that's remotely related is: Dns.GetHostByName() and Dns.GetHostByAddress(). However,these methods deal with IPHost objects, which only contain DNS or IP information -- nothing about computer- name. Does anyone have any idea how to get a computer-name from an IP address in my C#/.NET application? Is there anything in .NET that will accomplish this? If so, what is it? If not, what can I call outside of .NET that I can incorporate into my application? Thanks!
If it's "across the wire" all you're going to get is the DNS reverse lookup. Machine names are not necessarily the same as the DNS name, and all TCP/IP w/DNS will give you is just that: The DNS name, which may or not be the machine name.
NetWkstaGetInfo()will only work on Windows machines (Pre Windows 2000 or Pre Windows 2000 compatible) where Anonymous access is allowed (a reeeeely reeeeeely reeely bad practice!) Why do you need to know the actual machine name anyway? If there's suspicious behavior, you can trace the IP back. If it's illegal behavior, you can go deeper and give the authorities your firewall logs for the offense.