Obtaining Network Address From Host IP Address And Subnet Mask
Mar 8, 2009Can anyone point me to some code which can help obtain the network address from the host IP and subnet mask?
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Enumerating Host Addresses From IP Address And Subnet Mask
Sep 24, 2011As part of my application I am hoping to be able to get the user to enter their IP address and subnet mask which will then enumerate all of the hosts in between which can then be scanned for various open ports/applications installed.
For instance, With a network of 10.91.100.0/255.255.255.252 hosts are valid 10.91.100.1 - .2
How can this be done in vb.net? I would assume also some error checking would need to be put in place to confirm as to whether the subnet mask was valid as well?
IP Address Filter Or Mask To Only Allow Valid IP Address Before Pinging Or Testing For Network Connection
Jul 6, 2011Are there any IP Address filters or masks available in Windows Forms as per following screenshot? A backslash shouldn't be allowed or it should be filtered somehow.
View 1 RepliesObtaining Network Lan ID And Getting Info From Outlook Address Book
May 19, 2010I need to be able to get the current users LAN id using VB.NET and then use this info to pull out the phone number and full name and perhaps other dept info from the address book in outlook. The application I am building is web based in VS 2008, and the users will access the site once they have logged into the companies network. So I need to obtain their LAN ID. They will then be able to send an email using the smtp client. I need the email to send the lan ID of the person as well as include the address book info in the subject. how to use the smtp client.
View 9 RepliesUsage Of Each Socket Address (protocol/network Address/port) Is Normally Permitted?
Aug 11, 2009SocketException was Unhandled: Only one usage of each socket address (protocol/network address/port) is normally permitted I get this error every time i click collect a second time.
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Obtaining RDP Details - Launch Remote Desktop From And/or Source IP Address?
Jul 26, 2010Our company uses Remote Desktop to allow our staff to access their computers remotely. Our staff first VPN's into the office and then from there, they can use Remote Desktop to access their computers.I would like to obtain details about where employees are logging in from. More specifically, the computer name they used to launch Remote Desktop from and/or source IP Address.Is this possible? If so, does anyone have any examples?
View 6 RepliesGet The Ip Address Of The Local Host?
Aug 28, 2009Im trying to get the Ip address of the local host.. but I'm Getting an Socket Exception in the Dns.GetHostEntry..
Public Sub SetUp()
Try
Dim hostname As IPHostEntry = Dns.GetHostEntry(Dns.GetHostName)
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How To Get The Current Host MAC Address
Feb 20, 2009How to get a current host mac address using vb.net code
View 2 RepliesSet A Host IP Address And Port?
Sep 30, 2009How can I set a host IP address and port.. and then detect if the port is open (accepting connections)or closed (denying connections)I came across this while searching, but it doesn't seem to function all that well..Using the port 80 and the host [URL] The result it gave me was closed... which is obviously wrong.So what can I do?Code: ( I have also imported "System.Net" and "System.Net.Sockets" )
Dim host As String = "www.google.com"
Dim port As Integer = 80
Dim addr As IPAddress = CType(Dns.GetHostAddresses(host)(0), IPAddress)
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Convert A Subnet Mask Into Binary (octets)
Oct 26, 2009How can I convert a subnetmask into binary, so I'll end up with 32 digits? I can convert it into Binary, using Convert.ToString(Long-to-convert, 2). But a subnetmask of 255.255.255.0 returns(it returns it without the spaces though):
1111 1111 1111 1111 1111 1111 0
When I want it to be:
1111 1111 1111 1111 1111 1111 0000 0000
Convert A Subnet Mask Into Binary (octets)?
Nov 27, 2009How can I convert a subnetmask into binary, so I'll end up with 32 digits?I can convert it into Binary, using Convert.ToString(Long-to-convert, 2)But a subnetmask of 255.255.255.0 returns(it returns it without the spaces though):
1111 1111 1111 1111 1111 1111 0
When I want it to be:
1111 1111 1111 1111 1111 1111 0000 0000
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IP Subnet Calculator - Networks And CIDR (Mask)
Feb 5, 2010I need test data for a IP Subnet calculator I have developed. I have tested some obvious scenarios, and all seems good, but the person developing can often be the wrong person to test.
The calculator can do one of two things:
1 - Given an existing network and CIDR (mask), and a new CIDR it will create a number of networks with the appropriate number of hosts.
2 - Given an existing network and CIDR (mask), and a list of c,h, (c = count, h=number of hosts) it will create the networks.
VS 2005 Verify Good Subnet Mask
Aug 24, 2011I am trying to verify that I have a valid subnet mask. I have already verified that the string format 255.255.255.0 or whatever 255.255.240.0 converts to a UInt32 but now I need to make sure its actually a subnet mask.
The bits should be split between 1's for the network part and 0's for the host part. It should start with all 1's and end in all 0's if it goes from 1's to 0's then finds any more 1's its an invalid subnet mask.
How To Get Network Card Address
Aug 14, 2009How can I get the Network Card Address using VB.Net?
View 2 RepliesC# - Get MAC Address When Network Adapter Is Disabled?
Jun 30, 2010Is there any way i can retrieve MAC Address when Network Adapter is disabled in .net?
View 4 RepliesFetching IP Address Of All Computers On A Network?
Aug 30, 2011am trying to get the IP address of all of the computers on a network. I know how to fetch the names of the computers on the network but I need to fetch the IP address to. I have a listview control with 2 columns 1 for the name of the computer (1st) and another column for the IP addres (2nd). I have the code so can the IP address be displayed in column 2
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
ListView1.Items.Clear()
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Find The Local Network Ip Address?
Jul 26, 2011I have a .net network application , and as part of improving the performance of the software i would like to find the shortest route to the server . When i have more than one network , i need to find the local network ip from these current ip list .
View 3 RepliesGetting Address Of A Mapped Network Drive
Mar 28, 2010my first question on this board. I'm creating a media player(Like so many others). I try playing files over my network. When I pass this address "M:songssome artistsome song.mp3" to the windows media player control it actually opens "\ServerMEDIAsome artistsome song.mp3". But when my program checks if it is playing the correct song it thinks it is not, because the strings aren't equal. Is there a way in VB to get the network address of a mapped network drive? I can already see that it is a network drive but not wich address it points to.
View 2 RepliesMake The Website Address Show In Browser Address Bar?
Aug 6, 2011I made web browser which consist address bar that I use it to type addressess in it i.ewhen I type [URL] it opens [URL] but when I go to anther page in google it doesnot show it's link in address bar lix InterntExplorer or other international browsers so how to show any link or any sub page's link in my browser address bar ?
View 1 RepliesVS 2008 : Use The DHCP API To Retrieve A Computer's MAC Address When Given The IP Address?
Nov 27, 2009I'm trying to use the DHCP API (using the references on pinvoke.net) to retrieve a computer's MAC address when given the IP address but I can't get the code to work. I've run all the C# code on pinvoke.net through the C#-to-VB converter but I'm stuck now.
Here's what I have so far. The value of res is always 5 (should be 0). Thing is, I can't find any documentation on what the return codes mean
vb
Private Sub GetMACDim client As String = "1.1.1.1" Dim server As String = "0.0.0.0" Dim si As New NativeMethods.DHCP_SEARCH_INFO si.SearchType = NativeMethods.DHCP_SEARCH_INFO_TYPE.DhcpClientIpAddress si.ClientIpAddress = Convert.ToUInt32(StringIPAddressToUint32(client)) Dim res As UInteger Dim oInfo As IntPtr
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Communications :: Find Device On Network By Its Mac Address?
Feb 6, 2009I have a small embedded web server and to setup its network parameters I use a serial port, however this is giving me a lot of trouble due to USB to serial adapters (in some computers work in other doesn't).
However the other day I saw that Buffalo has a little program to find their NAS boxes (or network drives) when you don't know their IP address or got the wrong one so I assume they do it by looking for mac addresses.Is there any way of doing this with VB 2005 or higher? Basically I don't know the IP of the embedded server so I need to find it on a network, how do I find it?
a) I could do a general IP scan assuming it is on the same subnet than the host computer
b) if it has a different subnet... a general IP scan is not going to work, is it?
Getting Basic Network Information Such As The Ip Address Gateway
Aug 29, 2009how i can go about getting basic network information such as the ip address gateway etc
View 2 RepliesMAC Address And Enable/Disable Network Adapter Local Use Only?
Oct 22, 2009Im trying to Get the mac of the local computer(s) on a network and Enable/Disable the Connectiong adapter that is UP (In use), i know i can do this with the system as it stands and for a while i've used a *.bat file to do this for me but not i want a more elabrate way of doing it using a program i make for this, i will also be making it Control other computers remote on my network the same with a simple server side, in the future!, i just need it to Work on the local computer, I've read up about diffrent ways of doing this, like Getting the MAC via Registry like so:
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Network Tree Discovery - Get The FULL Path Of The Address
Mar 24, 2012Lets say that Computer 2 connects to an external server. How can that server get the FULL path of the address, not only the IP of the first router?(of course in vb.net)
View 4 RepliesGet Hostname, IP Address And Mac Address Of The Computers By Domain?
Jun 28, 2009 ' Use Your work Group WinNT://&&&&(Work Group Name) Dim DomainEntry As New DirectoryEntry("WinNT://Wokgroup") DomainEntry.Children.SchemaFilte
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Added Email Address Validation But It Only Check The Email Address Format?
Feb 9, 2011In member register page, I added email address validation but it only check the email address format, such as .com, .net, .org.If user inputs fake account such as aaabbb01010@gmail.com, how to verify it and return an error?
View 2 RepliesAssign The Ip Address And Dns Address?
Oct 3, 2010how to assign a static ip address and dns adress by VB2008?
I search in MSDN,use system.net.ipaddress??or something else?
Get A Computer's Mac Address With An IP Address?
May 11, 2010does anyone know how to get a computer's mac address with an IP address?
View 25 RepliesError "The Parameter 'address' Cannot Be An Empty String. Parameter Name: Address"
Jan 30, 2010where i put the *'s i get the error "The parameter 'address' cannot be an empty string. Parameter name: address".
Private Sub Timer2_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer2.Tick
Dim mail As New MailMessage()
Dim SmtpServer As New SmtpClient
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Obtaining WiFi Network Information?
Jan 9, 2012I am developing an application to be deployed on an XP Tablet edition PC. I am interested in monitoring information (e.g. Channel, AP MAC Address) about the Access Points that I am connecting to to location where in the facility a given Tablet PC is operating in.I have been unsuccessful in finding any code samples/snippets showing information on how to retrieve this sort of information.
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