I'm trying to access global shared memory from an ASP.NET web method while impersonating a client, but I get access denied when trying to open the handle. As an example:
[WebMethod]
public string Testing()
{
string result = null;
using (var ctx = WindowsIdentity.Impersonate(IntPtr.Zero))
[code]...
I am stumped. i want my asp.net website to access a network share folder which is located at say, //hero/superman. I can do it manually.
I've done the following:
1. Included <identity impersonate="true" userName="IUSR_TEST" password="test" /> in my web.config.
2. Set anonymous access in IIS 5.1 with username IUSR_TEST and password: test in the account that is used for anonymous access. Checked integrated windows authentication.
3. Created a profile for IUSR_TEST in computer/management/local users and created the password: test for it. It is a member of guest.
4. Created a user account IUSR_TEST for the network share computer. gave it the same username and password.
4. On the network share computer, I've enabled access for the following people: ASPNET, NETWORK SERVICE, and IUSR_TEST.. all with full potential (for now) for the directory path in question //hero/superman which is really located on: c:herosuperman. I've given it full access.
But when I StreamReader fs = File.OpenText(Server.MapPath(@"\herosuperman est.txt"); I get the error "UnauthorizedAccess Exception". Access to the path \herosuperman est.txt is denied.
So what did I miss, what am I doing wrong. The key thing here are:
the webserver is on a domain. the network share computer is NOT on a domain, it is on it's own workgroup. This workgroup, lets just say is called "villains". So if I have to manually map the network drive to access the files, I must type: /villains/IUSR_Test and password: test to be able to map it on my webserver local computer.
Does anyone know of any shared hosts that provide more than the typical 200MB of app pool memory?
View 2 RepliesI'm tearing my hair out here - I'm building a .NET web application at the moment and every time I either want to access the database/build a page or create a new datasource I get the following error:A connection was successfully established with the server, but then an error occurred during the login process. (provider: Shared Memory Provider, error: 0 - No process is on the other end of the pipe.)I also get it in SQL Server Management Studio 2008 quite a lot too. I know what you're thinking - search the web for the error, read what the nice people have to say. Only I've spent the last week or so doing this, and I'm no closer to resolving this.
View 8 RepliesI am unable to connect to my local instance of SQL Server 2008 Express using SQL Server Management Studio.I believe the problem is related to a change I made to the connection protocols. Before the error occurred, I had Shared Memory enabled and Named Pipes and TCP/IP disabled. I then enabled both Named Pipes and TCP/IP, and this is when I started experiencing the problem.
I have now set Named Pipes and TCP/IP back to disabled. When I try to connect to the server with SSMS (with either my SQL server sysadmin login or with windows authentication), I get the following error message:
"A connection was successfully established with the server, but then an error occurred during the login process. (provider: Named Pipes Provider, error: 0 - No process is on the other end of the pipe.) (Microsoft SQL Server, Error: 233)"
My first question here is: why is it returning a Named Pipes error? Why isn't it using Shared Memory? It seems like it is not listening on Shared Memory for some reason?When I set Named Pipes to enabled and try to connect, I get the same error message.My windows account is does not have administrator priviliges on my computer.
NET Cache stores values on the memory of the client or on the server?If it stores on the memory of the client then can i store the values in Cache instead of cookies - as this will improve speed of my application
View 4 Replieslet me know what does these access modifiers means.private shared vs public shared vs protected shared
View 5 Repliesi Have multiple File upload. press Uploaded button it will store on sever temp folder. those details are in List on our program.
when i have press the submit then only those listed files fetch form server-temp-Folder and replace in server-secified- folder.
i want to make those list class save into client location for not affted by some of other updates.
how cn i store the custome list in client memory
I am trying to access a shared folder which is located on a different server rather than on the asp.net server.
I configured windows authentication and set impersonation to true. Also try with enable/disable basic authentication.
I have tried the following:
with a mapped driveshared folder access (\sharedfolder)virtual directory pointing to shared folder with pass through configuration. However none of the above works. I am getting "Access Denied" error when trying with shared folder and virtual directory. In the case of mapped drive getting "Not Found" error.
I'm looking for a direct way for server-side code to access a flash shared object. Obviously you can write some javascript that can read flash shared objects via ExternalInterface. But doing that requires a client code execution, and then a push of the shared object data back to the server-side code. This seems rather complicated.
So is there a way for asp.net, php, or any other server-side script to request the data in a flash shared object?
Server A exists on domain A and server B exists on domain B. From server A I need to output file names that exist on shared folder on server B. I tried the following with no success (Access denied error):
DirectoryInfo dir = new DirectoryInfo(@"\serversharedFolder");
After some Googling I found that I need to use personlization to impersonate an existing user on Server B that has access to that shared folder. I used a C# personlization class as explained on codeproject (http://www.codeproject.com/KB/cs/cpimpersonation1.aspx). I supply the domain, the user, and the password and hope to get access to the shared folder BUT the error I see now is"Login failure: unknown user or bad password".
I am 100% sure that the domain, user, and password I supplied are correct. When trying to access the share via windows explorer from server A I am prompted for a username and password. After entering domainusername and the password I have access to the folder. So I know that the credentials I supplied are correct.
Am I going about this the right way? I have full access to server A and B so maybe there is an easier way to accomplish my goal.
In my application, first, i have not connected to iis server, and trying to access secondary path at this time it is accessing that path. but when it is connected to IIS server, it is giving unathourizedaccess exception.
View 1 RepliesI am trying access a file from shared path and I face this error.
View 3 RepliesI would like to connect to a password protected shared location that has an access database using an ASP page. I have the user name and password needed to connect to the shared location but I am not sure how to set up the connection string in order to get this done. The access database I would like to connect to does not need a username or password, only the shared location does.
View 1 RepliesI want to read some information from an xml file and store it ready in memory so that it can go out with every page response without being reloaded from the xml on every request.
What is the best way of doing this?
It looks to me like there are 2 options. Either create a class with static fields that the information is stored in. Or create a class with public fields that the info is stored in and create an instance of that class at application level.
Is that correct, are both of those options viable? or will I not be able to access the fields in the second method without creating an instance of the class in the code that responds to the page request(basically if you create an instance of a class at application level can you use that instance from within code anywhere in your website as long as it is public)?
I have made public readonly shared properties in my class.
I want to acces a property's value in .aspx page. As i think that is possible through scriptlet like this
<%= ClassName.Propertyname %>
But its not working .Where i am wrong ?
i am currently developing an asp.net mvc 2 web application and i would like to create new foldersprogrammatically with access rights, in order to enable loged on users upload their image files.My question has to do with how to assign write access using Directory.CreateDirectory function and assigning DirectorySecurity rules (meaning for which user should i enable user rights, etc...). Note that the hosting envirnoment uses IIS 7.
View 1 RepliesI am having some trouble with my IIS web server & SQL reporting services.
At the current time my site is playing host to both reporting services (/reports & /reportserver) as well as my personal website (domain.com)
Only just recently have I implemented a Theme on my site and as such I have placed a statement in my web.config file directing it to apply a certain theme in the following manner:
<pages styleSheetTheme="General">
Because of this when I try to access the report pages it fails, telling me it couldn't find the Theme. So, what I did was locate the source files for the /reports & /reportserver directories and placed the App_Theme folder in them hoping that would sort everything out.
What I am getting now is the following error:
*Using themed css files requires a header control on the page. e.g. head runat="server" *
Does anyone know how I can get around this? Do I have to hack the SQL reporting aspx pages? I do NOT want to remove the web.config declaration.
I have a basic WCF service using basicHttpBinding. I have my site project and my services project. In my site project, I have a regular Services Reference to a service in my services project. In my development environment, it works fine. However, in our staging environment, we have enabled impersonation on the services application. This service connects to a SQL database using this user, of course.
The issue is, while the other ASMX services seem to impersonate just fine with the user defined in the web.config, the WCF service is still running as the site's user, causing SQL authentication to fail.
Are there extra steps to enable impersonation for my WCF service? I have not done anything special beside adding:
service.ClientCredentials.Windows.AllowedImpersonationLevel = System.Security.Principal.TokenImpersonationLevel.Delegation;
After I initialize my service proxy from my website.
I am working on a ASP.NET 2.0 application. I get the following exception sometimes when i access the web application. I believe it is related to the server where the application is hosted? Exception of type 'System.OutOfMemoryException' was thrown. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.OutOfMemoryException: Exception of type 'System.OutOfMemoryException' was thrown. Source Error: An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. Stack Trace:
[OutOfMemoryException: Exception of type 'System.OutOfMemoryException' was thrown.]
System.Reflection.Assembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, Assembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection) +0
System.Reflection.Assembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, Assembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection) +43
System.Reflection.Assembly.InternalLoad(AssemblyName assemblyRef, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) +127
System.Reflection.Assembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) +142
System.Reflection.Assembly.Load(String assemblyString) +28
System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String assemblyName, Boolean starDirective) +46
[ConfigurationErrorsException: Exception of type 'System.OutOfMemoryException' was thrown.]
System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String assemblyName, Boolean starDirective) +613
System.Web.Configuration.CompilationSection.LoadAllAssembliesFromAppDomainBinDirectory() +203
System.Web.Configuration.CompilationSection.LoadAssembly(AssemblyInfo ai) +105
System.Web.Compilation.BuildManager.GetReferencedAssemblies(CompilationSection compConfig) +178
System.Web.Compilation.BuildProvidersCompiler..ctor(VirtualPath configPath, Boolean supportLocalization, String outputAssemblyName) +54
System.Web.Compilation.ApplicationBuildProvider.GetGlobalAsaxBuildResult(Boolean isPrecompiledApp) +227
System.Web.Compilation.BuildManager.CompileGlobalAsax() +52
System.Web.Compilation.BuildManager.EnsureTopLevelFilesCompiled() +337
[HttpException (0x80004005): Exception of type 'System.OutOfMemoryException' was thrown.]
System.Web.Compilation.BuildManager.ReportTopLevelCompilationException() +58
System.Web.Compilation.BuildManager.EnsureTopLevelFilesCompiled() +512
System.Web.Hosting.HostingEnvironment.Initialize(ApplicationManager appManager, IApplicationHost appHost, IConfigMapPathFactory configMapPathFactory, HostingEnvironmentParameters hostingParameters) +729
[HttpException (0x80004005): Exception of type 'System.OutOfMemoryException' was thrown.]
System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +8890735
System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +85
System.Web.HttpRuntime.ProcessRequestInternal(HttpWorkerRequest wr) +259
What can be the reason for this error and what to check on the code or the server?
A customer reported that our asmx web service is continually increasing in memory (mem usage as well as private bytes). We are able to reproduce the problem in our lab with Windows 2003 Server SP2 (fully patched) on some of the machines. The customer is using Windows 2008.
We created a Hello World web service targeting the 2.0 framework built under VS2005 SP1 and a test client that continues to call it. The memory increases steadily - approximately 40K per client request. If the test app is paused, the memory remains the same. When it is closed, the memory drops. Explicit calling of GC.Collect does not drop the memory.
We have run the memory profiler on the service and the leak is all native memory. We have uninstalled/re-installed the Framework on one of the machines but no difference. To our knowledge all of the security and IIS settings are not modified. We have compared app pool, default web site and virtual directory properties to machines that have no problem and they are identical.
I have a WebApplication1 running in a port (let's say 4000) and I'm trying to build a website (WebSite1), running on IIS, that is running on the same server. I have no control over the WebApplication1, it's a packaged software, WebSite1 is built by me.
The WebSite1 will do a custom user validation and then will let the user access the WebApplication1:4000 under the impersonated user under which the website is running, not the user in the client machine. Sort of like changing the user in the session.
Short Version: Can anyone say whether it's possible or not to use impersonation in ASP.NET to access mapped drives?
Long Version:
I'm currently using impersonation in ASP.NET to gain access to network files. This is working perfectly for any network file using a UNC path, but it is failing to access any files on mapped drives defined for the user account I'm impersonating.
For example, let's say a file lives on the network at "machinefolderfile.txt", and let's also say that drive S: is mapped to "machinefolder". We need to be able to access both the full UNC path, "machinefolderfile.txt", as well as the shorter, mapped drive path, "S:file.txt".
Obviously the standard ASP.NET process cannot access either.
Using a console application that runs under the local account with the mapped S: drive, calling File.Exists(@"machinefolderfile.txt") returns true, and File.Exists(@"S:file.txt") also returns true.
However, when impersonating in an ASP.NET context with the same local account, only File.Exists(@"machinefolderfile.txt") returns true. File.Exists(@"S:file.txt") returns false.
I'm testing with IIS 7 running on my local Windows 7 Professional box, though this will need to run in both IIS 6 and IIS 7.
Impersonation is handled with a couple of classes in C# which I'll include here:
public static class Impersonation
{
private static WindowsImpersonationContext context;
public static void ImpersonateUser(string username, string password)
{
ImpersonateUser(".", username, password);
}
public static void ImpersonateUser(string domain, string username, string password)
{
StopImpersonating();
IntPtr userToken;
var returnValue = ImpersonationImports.LogonUser(username, domain, password,
ImpersonationImports.LOGON32_LOGON_INTERACTIVE,
ImpersonationImports.LOGON32_PROVIDER_DEFAULT,
out userToken);
context = WindowsIdentity.Impersonate(userToken);
}
public static void StopImpersonating()
{
if (context != null)
{
context.Undo();
context = null;
}
}
}
public static class ImpersonationImports
{
public const int LOGON32_LOGON_INTERACTIVE = 2;
public const int LOGON32_LOGON_NETWORK = 3;
public const int LOGON32_LOGON_BATCH = 4;
public const int LOGON32_LOGON_SERVICE = 5;
public const int LOGON32_LOGON_UNLOCK = 7;
public const int LOGON32_LOGON_NETWORK_CLEARTEXT = 8;
public const int LOGON32_LOGON_NEW_CREDENTIALS = 9;
public const int LOGON32_PROVIDER_DEFAULT = 0;
[DllImport("advapi32.dll", SetLastError = true)]
public static extern int LogonUser(
string lpszUsername,
string lpszDomain,
string lpszPassword,
int dwLogonType,
int dwLogonProvider,
out IntPtr phToken
);
[DllImport("advapi32.dll", SetLastError = true)]
public static extern int ImpersonateLoggedOnUser(
IntPtr hToken
);
[DllImport("advapi32.dll", SetLastError = true)]
public static extern int RevertToSelf();
[DllImport("kernel32.dll", SetLastError = true)]
public static extern int CloseHandle(IntPtr hObject);
}
Then, during Page_Load, we basically do something like this:
Impersonation.ImpersonateUser("DOMAIN", "username", "password");
if (!File.Exists(@"S:file.txt"))
throw new WeCannotContinueException();
I realize using mapped drives isn't a best practice, but for legacy reasons it's desirable for our business. Can anyone say whether it's possible or not to use impersonation in ASP.NET to access mapped drives?
I am building an asp.net application, using II6 on windows server 2003 (vps hosting).
I am confronted with an error I didn't receive on my development machine (windows 7, iis 7.5, 64 bit).
When my wcf service tries launching my query running against a local sql server this is the error I receive:
Memory gates checking failed because the free memory (43732992 bytes) is less than 5% of total memory. As a result, the service will not be available for incoming requests. To resolve this, either reduce the load on the machine or adjust the value of minFreeMemoryPercentageToActivateService on the serviceHostingEnvironment config element.
I have both VS 2005 and 2008 installed on my machine. 2005 is fine. For 2008, literally any asp.net project I try to create gets this eror. I try stepping into the code, and the error occurs apparently before anything that I can trap is loaded. There is no information written to the event log. I have tried this with a "Hello World" webpage with nothing else going on. Seems unique to my Windows Server 2003 machine.
View 3 Replies
