Bypass Proxy Server, ASP Website on IIS - c#

I've actually deployed my asp website on IIS and everything works well. I have done some reading on how to bypass the proxy server but i'm still unsure on how to do it. The reason why i want to bypass the proxy server on the network is to be able to read client's ip address (the ip address behind the proxy). Frankly speaking, i don't have much knowledge on this topic..
I read from MSDN that you can add in lines of codes into Web.Config file to bypass the proxy server. But i'm not sure what to type in or how to use this defaultproxy tag.
Link
Right now i'm only retrieving either 127.0.0.1 which is localhost or the machine's network external ip address which is not what i want..
Anyone can point me in the right direction to getting ip address behind the proxy? Appreciate any help please. Thank you..
Codes i have been experimenting to get client's IP address:
protected void getIP_Click(object sender, EventArgs e)
{
String hostName = System.Net.Dns.GetHostName();
String clientIpAddressHostName = System.Net.Dns.GetHostAddresses(hostName).GetValue(0).ToString();
IP1.Text = clientIpAddressHostName;
String clientIpAddress = HttpContext.Current.Request.ServerVariables["REMOTE_HOST"].ToString();
IP2.Text = clientIpAddress;
String ip = null;
if (String.IsNullOrEmpty(HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"]))
{
ip = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
}
IP3.Text = ip;
String ipNext = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"].ToString();
IP4.Text = ipNext;
//String ipNextNext = HttpContext.Current.Request.UserHostAddress;
String ipNextNext = HttpContext.Current.Request.ServerVariables["LOCAL_ADDR"].ToString();
IP5.Text = ipNextNext;
String last = System.Net.Dns.GetHostEntry(System.Net.Dns.GetHostName()).AddressList.GetValue(0).ToString();
IP6.Text = last;
Label2.Text = getIPAdd();
try
{
String externalIP;
externalIP = (new WebClient()).DownloadString("http://checkip.dyndns.org/");
externalIP = (new Regex(#"\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}")).Matches(externalIP)[0].ToString();
Label1.Text = externalIP;
}
catch (Exception ex)
{
logManager log = new logManager();
log.addLog("IP Add", "IP Add", ex);
}
}
private String getIPAdd()
{
System.Web.HttpContext context = System.Web.HttpContext.Current;
string ipAddress = context.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
if (!string.IsNullOrEmpty(ipAddress))
{
string[] addresses = ipAddress.Split(',');
if (addresses.Length != 0)
{
return addresses[0];
}
}
return context.Request.ServerVariables["REMOTE_ADDR"];
}
Results,
Requested Details:

I just used this to get the client IP address:
HttpContext.Current.Request.UserHostAddress
As I can see you have that one in your code too, but it's commented out.
It worked for me:

Related

How to get client machine name during login. C# MVC

I tried this link in stackoverflow but not getting the client's name.
clientHostName = clientIpAddress = string.Empty;
try
{
clientIpAddress = Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
if (string.IsNullOrEmpty(clientIpAddress))
{
clientIpAddress = Request.ServerVariables["REMOTE_ADDR"];
}
System.Net.IPAddress myIP = System.Net.IPAddress.Parse(clientIpAddress);
System.Net.IPHostEntry GetIPHost = System.Net.Dns.GetHostEntry(myIP);
clientHostName = GetIPHost.HostName; // Working in dev environment. Moving to QA env this is returning null
}
catch { }
Take a look at blowdarts answer in the post you linked. It is not possible to get the machine name of remote machines this way. If you are in control of the client application you may try to make the client explicitly send it's machine name instead.

How to get client ipaddress and device name who logs in to my website using c#

I have searched and read almost every article related to my search about how to get client ipaddress and machine name but all the codes return only server ip and name. I've tried these codes also given below, it gives my PC ip on localhost but on the server, it gives server ip and name :
string stringHostName = Dns.GetHostName();
IPHostEntry ipHostEntries = Dns.GetHostEntry(stringHostName);
and also used this method :
public string GetUserIPAddress()
{
System.Web.HttpContext context = System.Web.HttpContext.Current;
string ipAddress = context.Request.ServerVariables["HTTP_X_FORWARDER_FOR"];
if (!string.IsNullOrEmpty(ipAddress))
{
string[] addresses = ipAddress.Split(',');
if (addresses.Length != 0)
{
return addresses[0];
}enter code here
}
return context.Request.ServerVariables["REMOTE_ADDR"];
}
It gives ::1 on localhost but on the server it gives server ip only.
Kindly help me if there any way possible to get client ipaddress and machine name using C#.

Send E-mail notification If a certain value (IP Address) is found in the array

I have a C# console application and want to be able to send an Email to a certain address if any IP addresses that are not local are found in the array, I am assuming I would use a If != statement but i cannot get anything to work. Any tips or help would be greatly appreciated.
System.Net.IPAddress[] addresslist = Dns.GetHostAddresses(C);
{
string IPs = "";
bool firstIP = true;
foreach (IPAddress ip in addresslist)
{
if (!firstIP)
{
IPs = IPs + ",";
}
IPs = IPs + ip;
firstIP = false;
}
addresslist.ToString();
if addresslist != { "10.1.20.99"} //example, have multiple IP's
then //..... this is where I am stuck
you can remove local addresses with
var filteredIPs = ipaddresslist.Where(p => !p.StartsWith("10.1"));
Then you can send a message with something like sendimportantmails(String.Join(",", filteredIPs));

How to detect static ip using win app in c#

Please correct me if i am wrong. There are two types of IP -
One, the static(fixed) IP address we assign to the LAN card and second that we received from the service provider.
For ex. The IP address set for my machine is 192.168.1.10 while the IP address given by ISP is 218.64.xx.xx. (You can check this using http://www.ip2location.com/)
When I use ASP.net, i can get the IP address provided by ISP using -
HttpContext.Current.Request.UserHostAddress;
The Problem:
Now, I am working in Windows Forms environment but unable to get the IP provided by ISP, though I am able to get the fixed IP.
Can anybody help me?
Thanks for sharing your time.
You're trying to get the external IP address of your router.
You need to send an HTTP request to a third-party service which will reply with the IP address.
You can do that using the WebClient class.
For example:
///<summary>Gets the computer's external IP address from the internet.</summary>
static IPAddress GetExternalAddress() {
//<html><head><title>Current IP Check</title></head><body>Current IP Address: 129.98.193.226</body></html>
var html = new WebClient().DownloadString("http://checkip.dyndns.com/");
var ipStart = html.IndexOf(": ", StringComparison.OrdinalIgnoreCase) + 2;
return IPAddress.Parse(html.Substring(ipStart, html.IndexOf("</", ipStart, StringComparison.OrdinalIgnoreCase) - ipStart));
}
The terminology is wrong; your machine has a private IP and a public IP (not "static" and "dynamic").
To get the public IP, you need to bounce off a public server, e.g., whatismyip.org or your own server.
i found manu methods one of them is a html request to http://whatismyip.com
public static IPAddress GetExternalIp()
{
string whatIsMyIp = "http://whatismyip.com";
string getIpRegex = #"(?<=<TITLE>.*)\d*\.\d*\.\d*\.\d*(?=</TITLE>)";
WebClient wc = new WebClient();
UTF8Encoding utf8 = new UTF8Encoding();
string requestHtml = "";
try
{
requestHtml = utf8.GetString(wc.DownloadData(whatIsMyIp));
}
catch (WebException we)
{
// do something with exception
Console.Write(we.ToString());
}
Regex r = new Regex(getIpRegex);
Match m = r.Match(requestHtml);
IPAddress externalIp = null;
if (m.Success)
{
externalIp = IPAddress.Parse(m.Value);
}
return externalIp;
}
or use
IPHostEntry IPHost = Dns.GetHostEntry(Dns.GetHostName());
Console.Write(IPHost.AddressList[0].ToString());
you can try this in the System.Net namespace:
Dns.GetHostAddresses(Dns.GetHostName())
try with this (using System.Net):
IPHostEntry he = Dns.GetHostByName(Dns.GetHostName());
var s = he.AddressList[0].ToString(); // returns IP address

How to get the server IP Address (in C# / asp.net)?

Is there a 1 line method to get the IP Address of the server?
Thanks
Request.ServerVariables["LOCAL_ADDR"];
From the docs:
Returns the server address on which the request came in. This is important on computers where there can be multiple IP addresses bound to the computer, and you want to find out which address the request used.
This is distinct from the Remote addresses which relate to the client machine.
From searching the net I found following code: (I couldn't find a single line method there)
string myHost = System.Net.Dns.GetHostName();
// Show the hostname
MessageBox.Show(myHost);
// Get the IP from the host name
string myIP = System.Net.Dns.GetHostEntry(myHost).AddressList[index].ToString();
// Show the IP
MessageBox.Show(myIP);
-> where index is the index of your ip address host (ie. network connection).
Code from: http://www.geekpedia.com/tutorial149_Get-the-IP-address-in-a-Windows-application.html
As other(s) have posted, System.Net.Dns.GetHostEntry is the way to go. When you access the AddressList property, you'll want to take the AddressFamily property into account, as it could return both IPv4 AND IPv6 results.
This method will return your machine public IP address when run this code on your PC and when you deploy your application on server will return Server IP address.
public static string Getpublicip()
{
try
{
string externalIP = "";
var request = (HttpWebRequest)WebRequest.Create("http://icanhazip.com.ipaddress.com/");
var response = (HttpWebResponse)request.GetResponse();
var responseString = new StreamReader(response.GetResponseStream()).ReadToEnd();
externalIP = new WebClient().DownloadString("http://icanhazip.com");
return externalIP;
}
catch (Exception e)
{
return "null";
}
}

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