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Web Q&A: XML Security Questions

Posted By:      Posted Date: August 21, 2010    Points: 0   Category :ASP.Net

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Redirect to Security Questions if Site accessed from unrecognized computer?


I'm fairly new to ASP.NET and i'm using the Membership Provider.  I have the need to do similar to some banking sites. Baically I need to track "authorized" computers/ip's for a user.  If the user accesses the site form a recognized Computer/IP then the user is allowed into the app after successful login.  If the computer/IP is not recognized I need to redirect them to a screen to answer the security question setup in fhte Membership Provider.

Has anyone done anything like this or can anyone point me to any examples?  I did a search, but can't seem to find anything.

My idea is to maintain a list of authorized computers/IP addresses and check them on initial login.  If the IP address isn't found I can redirect them to the questions.  My concern is that they are then actually authenticated and could enter any of the site URL's as an authenticated user.

Any suggestions greatly appreciated. 

Frequently Asked Questions about the ASP.NET Security Vulnerability

Two days ago I published an important blog post about a security vulnerability in ASP.NET .  In it I discussed a workaround that we recommend customers use to help prevent attackers from using the vulnerability against your applications. Below are answers to some common questions people have asked since then about the vulnerability. Is Microsoft going to release an update to fix the vulnerability? Yes.  We are working on an update to ASP.NET that we will release via Windows Update once it has been thoroughly tested and is ready for broad distribution. Until the update is available, we will also publish details on workarounds (like the one described in this post ) that can be applied immediately to help protect against the vulnerability...(read more)

Basic Security Questions



I'm new to ASP.NET, so please excuse my stupid questions^^

I have already done many tutorials but i don't understand how to work with that membership thing.

If I click on my project and select ASP.Net Configuration I can Setup Users, Roles and so on. But where do they get saved?

How does this ASP.Net Configuration behave after the page goes live, i don't want anybody who knows the adress of this "backend" to access it.

Many Questions, perhaps easy answers...

Maybe you have a good tutorial for me, beacause i didn't find one that explained the whole security subject to me.



Web Services - Security questions


every one who is working on web services please let me know the answers to following questions I have about
web service security.

1. Which one is best authentication for web services (forms authentication or windows authentication)

2. Is it necessary to implement security for intranet web services?

3. If web service exposing multiple web methods, should we authenticate every time client calls a method
or any other way?

4. How to implement message level security?


SharePoint Tutorial - Security

Security in SharePoint is comprised of users, groups and roles.

Users, Groups and Roles

A user account comes from the authentication system. For example, if Active Directory is used to authenticate then the user accounts will come from it.

There are two types of groups SharePoint uses: domain groups and SharePoint groups.

C# Interview Questions

C# Interview Questions
This is a list of questions I have gathered from other sources and created myself over a period of time from my experience, many of which I felt where incomplete or simply wrong. I have finally taken the time to go through each question and correct them to the best of my ability. However, please feel free to post feedback to challenge, improve, or suggest new questions. I want to thank those of you that have contributed quality questions and corrections thus far.

There are some question in this list that I do not consider to be good questions for an interview. However, they do exist on other lists available on the Internet so I felt compelled to keep them easy access

Frequently Asked Questions - SQL Server Data Types

This is good and precise introduction and Frequently Asked Questions - SQL Server Data Types

Asp.net web site security database


Hello all, I'm new to asp.net and I'm currently practising some few stuffs. I'm creating a hotel reservation system using ASP.net Web site in visual studio 2008 and I currently don't have an App_Data in my solution explorer unlike visual web developer.

1. I have planned to make users of the website login before making their reservations.

2. I have also planned to develop the website such that I will be able to know all reservations made by each user.

First and formost, I will like to know how I can access/View the security database?

Secondly, how do I link my custom made reservation database and the security database in order to achieve my second plan above.?

Someone help me.

Thank you.



hello i have the following problem

i have upload my content to hosting server but i get the following error

Security Exception

Description: The application attempted to perform an operation not allowed by the security policy.  To grant this application the required permission please contact your system administrator or change the application's trust level in the configuration file.

Exception Details: System.Security.SecurityException: Request for the permission of type 'System.Web.AspNetHostingPermission, System, Version=, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.

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:

[SecurityException: Request for the permission of typ

System.Security.SecurityException: Request for the permission of type 'System.Web.AspNetHostingPerm


Good Day all,

Having an issue with an outside user accessing my IIS7 box. I do not have this problem when running the website from my host machine. I found this post: Http://forums.asp.net/t/1371394.aspx. I assure you that this is not a solution because I am not storing any of my files on a network share. 

What do you think my approach should be. 

I already have read rights to IIS user to my BIN folder. 

Thanks for the help. 

XBAP Security


We have a small XBAP file upload app that we are having trouble deploying. We were getting security errors when we were pushing this application that we don't get when running in our development environments on our machines. We gave the XBAP app full permissions and still got errors. Then we created a personal certificate and were able to get this to work. But that means we have to load a client side certificate for each and every machine that wants to run this which is ridiculous. Does anyone have a solution for this?

Intranet Users Challenged When Using Windows Integrated Security


We've setup an intranet site using Windows Integrated Security. Its up and running and users can access it. However, they are being challenged with a login dialog for the server when they initially access the site.

Isn't is possible to configure the server so that the users aren't challenged AND are recognized as being already authenticated by Windows? We're trying to go with a seamless experience, whereby all they have to do is login to their machine like normal and then go from there.

Security Question Answer Retrieval


I know there is a method built in for retrieving the encrypted password, but how do I retrieve the encrypted security answer?

What I want to do is have a member profile update screen that the end user can update their password and security question and answer. However, when they get to this page, I want to already be showing the security question (the easy part) and its answer (the not so easy part).

I have updated web.config with passwordFormat=Encrypted and have added a machineKey with the generator (forgot the link, but located on eggheadcafe somewhere).

I haven't done ANYTHING yet, since I already have a user store with hashed information. I wanted to get some functionality done before publishing, wiping the store and recreating users (only a couple developers).


Linq qry with order by basic questions


I have never tried a group by with linq, now I do and I'm stuck.

I try to convert this sql statement to its linq counterpart :

SELECT COUNT(tb_Mailer_Smses.Id) AS [cnt], tb_Mailer_mailing.Id As [Id]
,SUM( CASE WHEN tb_Mailer_smses.DLRStatus = 200 THEN 1 ELSE 0 END) As [Delivered]
FROM tb_Mailer_mailing INNER JOIN
tb_Mailer_Smses ON tb_Mailer_mailing.Id = tb_Mailer_Smses.MailingId
WHERE tb_Mailer_mailing.ApplicationId = 1
GROUP BY tb_Mailer_mailing.Id

Is there some one who can me show me the convertion process ?

WCF The Security Support Provider Interface (SSPI) negotiation failed


I am using a wcf service that I created, when both hosting machine and the client machine are on the same domain everything works just fine. When I publish the client app to the webserver in the DMZ I am getting the following error:

SOAP security negotiation with '' for   
'' failed. See inner exception  
for more details.The Security Support Provider Interface (SSPI) negotiation failed.

Here is my service main where I set up the service


 Uri baseAddress = new Uri("Http://");
      ServiceHost selfHost = new ServiceHost(typeof(QBService), baseAddress);

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