Previously for all our asp.net applications we have been using a sysadmin user within SQL Server to connect and add/update/delete/get data. Our SQL Admin wants to delete that account and create a Domain Account so we can use that account within our .net applications.
My current connection string is:
name="name" connectionString="Data Source=server;Initial Catalog=database;Persist Security Info=True;User ID=user;Password=password" providerName="System.Data.SqlClient"
What would the connection string be for using a domain account?
I tried:
name="name" connectionString="Data Source=server;Initial Catalog=database;Persist Security Info=True;User ID=domain\user;Password=password" providerName="System.Data.SqlClient"
and it does not work.
Is there a different way to connect to SQL Server using a domain account?
Have a look at connectionstrings.com for every possible variation - a very handy resource I use all the time
Specifically, you want this format:
Data Source=myServerAddress;Initial Catalog=myDataBase;Integrated Security=SSPI;
This, of course, only works if the domain account in question is the one opening the connection.
There's no easy way to connect with arbitrary credentials - but you can impersonate the user in question and then connect.
This can be a bit of a pain. An alternative if the users are on the local network (or you control their browser config) is to use Kerberos authentication on your site. The pages will be served with the relevant user's permissions - then you can use the connection string above and IIS will connect to the Db with the appropriate credentials for each user. This is particularly useful from a security perspective as the Db is able to audit on a per-user basis, and permissions can be per-user/row/column instead of only per-app.
If you want to use different user account then the logged in user you have two options.
Option 1
You can add the user to Application pool Identity.
For this go to advance setting of application pool and edit the identity to use the user you want.
Option 2
Add this in Web config:
<identity impersonate="true" userName="Domain\User" password="Password" />
And use this connection stirng:
<add name="Name" connectionString="Data source=SqlServer;Initial Catalog=DbName;Integrated security=True" providerName="System.Data.SqlClient"/>
For More Details See:
https://msdn.microsoft.com/en-us/library/134ec8tc.aspx
Also found another good article here
https://www.codeproject.com/tips/520341/implement-impersonation-in-asp-net
Use integrated security:
Integrated Security=SSPI
Which has a variant:
Trusted_Connection=True
The different connection strings (for a variety of databases) can be found on connectionstrings.com.
With both of these you need to ensure that the application is running under the account you need to login with.
Yes, try this:
Data Source=server;Initial Catalog=database;Integrated Security=SSPI;
This specifies that you wish to use integrated Windows authentication where you were still trying to use SQL Server authentication (even though the username you entered looked like a Windows domain / user account SQL server still treats it as standard SQL Server authentication)
Also take a look at connectionstrings.com
Data Source=myServerAddress;Initial Catalog=myDataBase;Integrated Security=SSPI;
The above is a connection string for Windows Authentication against your SQL Server instance.
Related
I'm creating something like an Intranet. Users today already access directly SQL Server using Windows Authentication, where security grants are set for each user, but I want to put the ASP.NET Web Server between these users and the database. I want the IIS to pass user's windows authentication credentials (from users accessing the website) to the SQL Sever.
Conditions:
Both the Sql Server and the IIS are in the same domain.
They are in different machines.
I've found this acticle which explains how to do that, but there is a disclaimer saying that SQL and IIS must be in the same machine.
Is there some way to do that given my conditions?
The don't have to be the same machine, just make sure you have set up IIS to use Windows Authentication and also in your connection string connect as the windows user e.g.
<connectionStrings>
<add name="DatabaseConnectionName" connectionString="Data Source=localhost;Initial Catalog=YourDataBaseName;Integrated Security=True;" providerName="System.Data.SqlClient" />
</connectionStrings>
I have following connection string in my web application.
<add name="ApplicationDs" connectionString="Data Source=(localhost);Initial Catalog=DBName;User ID=XXX;Password=xxxxxxx;" providerName="System.Data.SqlClient"/>
For some security purpose , unable to put sql username and password directly in web.config file. If anything build in security option is available in asp .net to handle this.
Advice me
Use integrated security and run your web application with a user account you gave permissions to within your database.
Data Source=myServerAddress;Initial Catalog=myDataBase;Integrated Security=SSPI;
for more connection string examples, find them here
http://www.connectionstrings.com/sql-server-2012
You might consider encrypting your connection string section. If the security issue is that the username and password cannot be exposed in clear text, then encryption might help/solve the issue.
For more information on web.config encryption, see this link.
I have inherited an asp.net 2.0 application that uses a SQL Server 2005 Express database and I am grappling with the authentication mode.
I have read that windows authentication is more secure and locally that works just fine. I use the default machine account and a trusted connection in the connection string similar to :
value="trusted_connection=True;server=MYMachineName\SQLExpress;Database=DatabaseName;Pooling=false"
On the server though, I find myself having to grant more privileges to the aspnet user (execute, update) in the database and am wondering if this makes sense after all. The login verification is actually handled by the application.
Does it make more sense to set up a database user and use those credentials in the connection string? Would this be an acceptable connection string?
value="Server=myServerName\SQLExpress; Database=myDataBase; User Id=myUsername; Password=myPassword;"
If you’re not in a need for a very high security you’ll be doing just fine with sql authentication.
Try this connection string instead
<add name="connstring" connectionString="Data
Source=myServerName\SQLExpress; Initial Catalog=myDataBase;
Persist SecurityInfo=True;User ID=myUsername; Password=myPassword"
providerName="System.Data.SqlClient"/>
I have been building my web application with visual studio and sql server express and now I'm in the process of deploying it on a server. I need to change the connection string
This is what I have:
<add name="MySiteDBConnectionString"
connectionString="Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\MySiteDB.mdf;Integrated Security=True;User Instance=True"
providerName="System.Data.SqlClient" />
This is what I need to replace it with:
<add name="LocalSqlServer"
connectionString="Data Source=DBServerName;Integrated Security=false;Initial Catalog=DBName;User ID=DBLogin;Password=DBPassword"
providerName="System.Data.SqlClient" />
The problem is that I don't know where or even if I set up a password for the database. What is integrated security?
I'm using linq-to-sql, do I also need to make some changes in the dbml file?
Thanks for some suggestions.
If you are not using Intergrated Security you will need to set up a user and password on the database server itself. If you are using shared hosting it is possible this will be provided for you. You can then replace DBLogin and DBPassword with your credentials.
Intergrated security uses your windows login/password details to authenticate against the database.
With your linq to sql if you are not passing in a connection string yourself you will need to use the designer to change the connection to the new database (or just overwrite the one in your config file).
Integrated security means that it will use credentials that the web site (app pool) is running under to access the database. You'd need to have SQL server set up to allow this account access to read/write your tables in order for this to work. If your web site is set up to run under the anonymous network account, then it's unlikely that this would be the case. If your web site runs under a domain account, then it's possible that you would need to use integrated security.
If you're not using integrated security, then your DB admin will have set up a SQL login for your application. This is the id/password that you need to use in your connection string. It's possible that multiple accounts have been set up, an admin account, a read/write account, a read-only account, execute SP account (these describe the permissions assigned to the account, not necessarily their names). In that case choose the appropriate one -- it's almost certainly not the admin account unless your DBAs know nothing about security.
FYI, if you use the User ID=...;Password=... format, you can omit the Integrated Security=false as it will assume a SQL login account and password.
'Integrated Security' mode is what was formerly called 'Use Trusted Connection': it uses the credentials of the currently logged on Windows user (in this case, most likely the IUSR_xxx account the web application is running as, or sometimes the computer account) as its login credentials.
We have a windows account in the SQL Server 2008 called drwho for example
and a password. In the connection string we disabled integrated security and added User Id and password values.
User Id=THEDOMAIN\drwho;Password=......
However ASP.NET keeps thinking we are using SQL server authentication.
Any suggestions?
You cannot connect to SQL server using a domain user/pass. If you wish to connect as a domain user, you need to specify integrated security and run your ASP.NET process as that user.
See this page at Microsoft for more information.
You will have to use impersonate to do this. As far as I'm aware you can't pass domain usernames/passwords in connection strings only a trusted connection, .e.g.
<identity impersonate="true"
userName="domain\user"
password="password" />
the best place to check the validity of your connections strings is here
I suspect that you have not quite got the format correct.
Have you had a look at http://www.connectionstrings.com/? Always a good resource if you're having connection problems.