Enable or Disable an IP Address

[squirrelly1]

Ok, I have a Windows Server that I have DHCP setup on... I want to write piece of software that will allow me to enable or disable traffic on a specific ip address...

Is this possible using Visual Basic or Windows API???

Thanks for the input,

Squirrelly1

[rdove]

If you are looking for something in ASP, then you can use

Request.ServerVariables("REMOTE_ADDR")

This will tell you the IP address of the computer requesting your app.

[squirrelly1]

Unfortunately, I'm not using ASP, and the computer will not be accessing my app. What I need is basically a way to see all ip traffic moving through the server and stop throughput on any one IP address... An IP blocker if you will...

[Danial]

Originally posted by squirrelly1
Unfortunately, I'm not using ASP, and the computer will not be accessing my app. What I need is basically a way to see all ip traffic moving through the server and stop throughput on any one IP address... An IP blocker if you will...

I am currently planning to write something similar to your one. There are two ways of doing it. First you loop through all port(port scanner) and find out the state of each ports. This way is very slow and takes a long time to loop trhough all the ports. It is hard to show a realtime picture of the connection.

The second option is using an un documented API availabe which gives you the same result as the DOS command "NetStat". I am currently working on it and will give you more details on couple of days. If you are in a hurry then PM me if want to contact me through email.

Danial

[squirrelly1]

Danial,

It is not vital that I have this information immediately. I have not started this program yet, nor have I told my customer that I would be able to do it for them. I am just inquiring as to how it could be done. I do however appreciate any information that you could possibly give me regarding this issue.

To anyone else,

If you know anything of this or any sites where I might be able to find VB Networking help or tutorials, please post them.

Thank you all for your help,

Squirrelly1

[Danial]

Look for AllocateAndGetTcpExTableFromStack, GetTcpTable, GetUDPTable API, you should be able to find some example. Those are the two main API i am planning to use. I am currently working on other part of my utility, and soon will ad the functionality described in my earlier post.

Hope this helps.

Danial

[squirrelly1]

I see that each of these will tell me which IP have access to the system, but will they let me close a port, or access to the system by a specific IP??? This is what I am needing to do.


Squirrelly1

[squirrelly1]

Forget that previous post I just found a site that looks pretty promising...

Thank you very much for your assistance Danial, hopefully one day I can return the favor.

Squirrelly1

[Danial]

Originally posted by squirrelly1
but will they let me close a port, or access to the system by a specific IP??? This is what I am needing to do.

You could use the API SetTcpEntry to terminate connection.

Forget that previous post I just found a site that looks pretty promising...

Thank you very much for your assistance Danial, hopefully one day I can return the favor

Mind sharing the website? It might help me and others reading this thread too .

Glad i could help you.

Danial

[squirrelly1]

Here it is guys and gals... It's some really good sample code I found...

http://www.planet-source-code.com/UR...10/anyname.htm

Thanx again... I'll check out the other API You mentioned

squirrelly1