RijndaelManaged Decryption From SQL Server
Jan 17, 2008
Subject:RijndaelManaged decryption from SQL Server
Issue: I am trying to move the decryption code from C# to SQL Server 2005.
Web.config
...
<symmetricCryptoProviders>
<add algorithmType="System.Security.Cryptography.RijndaelManaged, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=xxxxxx" protectedKeyFilename="C:Keysfffff.key" protectedKeyProtectionScope="LocalMachine" type="Microsoft.Practices.EnterpriseLibrary.Security.Cryptography.SymmetricAlgorithmProvider, Microsoft.Practices.EnterpriseLibrary.Security.Cryptography, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null" name="RijndaelManaged"/>
</symmetricCryptoProviders>
...
.cs file
....
decString = Cryptographer.DecryptSymmetric("RijndaelManaged", encString);
....
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Feb 19, 2008
Hi.
I have a SQL Server 2000 database that contains information I would like to encrypt. The information is a field inside a table, and I would like to encrypt this information using a key, and decrypt it in my asp.net application using that key and use the decrypted data.
Please tell me how this can be done, or direct me to an article or a link on the subject.
Thanks in advance.
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Mar 30, 2015
Sql server 2008R2 (SP2) Ent, PROD DB myDB was encrypted. During Release mistakenly (Vendor created script blames some settings in ...- actually does not matter) Decryption started (ALTER .. SET ENCRYPTION OFF) as we got from ErrorLog.
For some reason initial encryption scan was aborted and then mentioned command: ALTER ... OFF was issued again. What we have now (after 60 h of decryption- encryption took only 2.5 h)- is_encrypted = 0 in sys.databases, encryption_state = 5 (decryption in progress) in sys.dm_database_encryption_keys (percent_complete= 0). But it seems myDB is still encrypted- I made a backup of myDB and tried to read it (restore filelistonly) from other server (with no encryption)- failed- asked for key. Seems metadata was changed when initial scan during decryption started but then stuck and (if I am correct) decryption was never completed. Question- any similar experience? How we can fix meta- data, i.e. assuming that myDB is still encrypted we should have is_encrypted = 1 and encryption_state = 3 (encrypted).
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May 4, 2015
I have created mirroring... one of the column is encrypted on mirror database and I can see the decrypted result when I do query when I actually logged into server (through remote connection) but when I use the same query through using SSMS from my laptop the query result come as the column is not decrypted,
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Mar 13, 2015
I have a SP SQL server that uses Handshake for the web parts. I am getting an error on SharePoint about 'An error occurred during Service Master Key Decryption' inside the web parts of the page, everything else comes up, from what I have researched MS says go under SQL Configuration Manager and change the service account. Is this the correct course of action for this type of error? I am just having a hard time believing that changing the engines service account will stop this issue, this account is used on several SQL server with no issues.
MCSA SQL Server 2012
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Aug 11, 2001
How to decrypt a Stored Procedure which has been encrypted in SQL Server 7.0
Thanks in Advance
Regards,
Karthik
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Oct 11, 2007
I am using the below function written by PESO to encrypt/Decrypt the data for my SSN Numbers stored as a Clear Text
First I am Encrypting all my SSN's using this function and storing it in the database in a seperate Column,
Some thing like this..
SELECT DBACentral.dbo.fnEncDecRc4( '145678908' , 'ty6578dmp1203' )
OUPPUT
--------
âUÙN_{��
How to Decrypt ( âUÙN_{�� ) using the below function.
CREATE FUNCTION dbo.fnEncDecRc4
(
@Pwd VARCHAR(256),
@Text VARCHAR(8000)
)
RETURNSVARCHAR(8000)
AS
BEGIN
DECLARE@Box TABLE (i TINYINT, v TINYINT)
INSERT@Box
(
i,
v
)
SELECTi,
v
FROMdbo.fnInitRc4(@Pwd)
DECLARE@Index SMALLINT,
@i SMALLINT,
@j SMALLINT,
@t TINYINT,
@k SMALLINT,
@CipherBy TINYINT,
@Cipher VARCHAR(8000)
SELECT@Index = 1,
@i = 0,
@j = 0,
@Cipher = ''
WHILE @Index <= DATALENGTH(@Text)
BEGIN
SELECT@i = (@i + 1) % 256
SELECT@j = (@j + b.v) % 256
FROM@Box b
WHEREb.i = @i
SELECT@t = v
FROM@Box
WHEREi = @i
UPDATEb
SETb.v = (SELECT w.v FROM @Box w WHERE w.i = @j)
FROM@Box b
WHEREb.i = @i
UPDATE@Box
SETv = @t
WHEREi = @j
SELECT@k = v
FROM@Box
WHEREi = @i
SELECT@k = (@k + v) % 256
FROM@Box
WHEREi = @j
SELECT@k = v
FROM@Box
WHEREi = @k
SELECT@CipherBy = ASCII(SUBSTRING(@Text, @Index, 1)) ^ @k,
@Cipher = @Cipher + CHAR(@CipherBy)
SELECT@Index = @Index +1
END
RETURN@Cipher
END
GO
Thanks for any help
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Feb 5, 2008
I have been testing two way symmetrical encryption. I have been able to encrypt rows of a spacific column using the following UPDATE statement, however, when I try and decrypt them, the query returns Null for the effected rows.
Can anyone see where I may have gone wrong in the decryption statement?UPDATE tblReceipts SET tblReceipts.CCNumber = EncryptByPassPhrase('Abracadabra!1234$',tblReceipts.CCNumber)
FROM tblReceipts
WHERE tblReceipts.CreditCardType > 0
Decrypt Does Not Work?????
SELECT CONVERT(varchar, DecryptByPassPhrase('Abracadabra!1234$',tblReceipts.CCNumber)) AS CCNumber
FROM tblReceipts
WHERE tblReceipts.CLIENTID = 15000My CCNumber field is nvarchar(20)My PassPhrase is just a test phraseThe data after it is encrypted in just a bunch of binary looking boxes
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Aug 11, 2000
Hi,
Every one
Can i Encrypt & Decrypt Data store in SQL SERVER table. If field is alredy Encripted, then how I can decrypt in SQL SERVER.
Thanks
Nirmal
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Apr 3, 2015
How do I tell SQL Server what key to use for DES3 decryption? I want to encrypt in Oracle and after ETL to SQL Server, be able to decrypt but keep a column's value encrypted in Oracle, SSIS and SQL side - only decrypting on the SQL Server side when needing to use the value.
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Oct 16, 2006
What solutions are available?
Is there a way to read about from server's metadata?
Gus
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Dec 12, 2006
This function is used to initialize the seed for the RC4 algorithmCREATE FUNCTION dbo.fnInitRc4
(
@Pwd VARCHAR(256)
)
RETURNS @Box TABLE (i TINYINT, v TINYINT)
AS
BEGIN
DECLARE@Key TABLE (i TINYINT, v TINYINT)
DECLARE@Index SMALLINT,
@PwdLen TINYINT
SELECT@Index = 0,
@PwdLen = LEN(@Pwd)
WHILE @Index <= 255
BEGIN
INSERT@Key
(
i,
v
)
VALUES(
@Index,
ASCII(SUBSTRING(@Pwd, @Index % @PwdLen + 1, 1))
)
INSERT@Box
(
i,
v
)
VALUES(
@Index,
@Index
)
SELECT@Index = @Index + 1
END
DECLARE@t TINYINT,
@b SMALLINT
SELECT@Index = 0,
@b = 0
WHILE @Index <= 255
BEGIN
SELECT@b = (@b + b.v + k.v) % 256
FROM@Box AS b
INNER JOIN@Key AS k ON k.i = b.i
WHEREb.i = @Index
SELECT@t = v
FROM@Box
WHEREi = @Index
UPDATEb1
SETb1.v = (SELECT b2.v FROM @Box b2 WHERE b2.i = @b)
FROM@Box b1
WHEREb1.i = @Index
UPDATE@Box
SETv = @t
WHEREi = @b
SELECT@Index = @Index + 1
END
RETURN
ENDANd this function does the encrypt/decrypt partCREATE FUNCTION dbo.fnEncDecRc4
(
@Pwd VARCHAR(256),
@Text VARCHAR(8000)
)
RETURNSVARCHAR(8000)
AS
BEGIN
DECLARE@Box TABLE (i TINYINT, v TINYINT)
INSERT@Box
(
i,
v
)
SELECTi,
v
FROMdbo.fnInitRc4(@Pwd)
DECLARE@Index SMALLINT,
@i SMALLINT,
@j SMALLINT,
@t TINYINT,
@k SMALLINT,
@CipherBy TINYINT,
@Cipher VARCHAR(8000)
SELECT@Index = 1,
@i = 0,
@j = 0,
@Cipher = ''
WHILE @Index <= DATALENGTH(@Text)
BEGIN
SELECT@i = (@i + 1) % 256
SELECT@j = (@j + b.v) % 256
FROM@Box b
WHEREb.i = @i
SELECT@t = v
FROM@Box
WHEREi = @i
UPDATEb
SETb.v = (SELECT w.v FROM @Box w WHERE w.i = @j)
FROM@Box b
WHEREb.i = @i
UPDATE@Box
SETv = @t
WHEREi = @j
SELECT@k = v
FROM@Box
WHEREi = @i
SELECT@k = (@k + v) % 256
FROM@Box
WHEREi = @j
SELECT@k = v
FROM@Box
WHEREi = @k
SELECT@CipherBy = ASCII(SUBSTRING(@Text, @Index, 1)) ^ @k,
@Cipher = @Cipher + CHAR(@CipherBy)
SELECT@Index = @Index +1
END
RETURN@Cipher
END
Peter Larsson
Helsingborg, Sweden
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Jan 3, 2008
This is related to post :
http://www.sqlteam.com/forums/topic.asp?TOPIC_ID=78552
got a issue with this one..im not sure why..
My results are as follows:
Select dbo.fnEncDecRc4('Orange12345', 'Hello123')
Output : ,M gl
Select dbo.fnEncDecRc4('Orange12345', ',Mgl')
Output : M
i am not able to decrypt it. Any idea why this is hapenning? Does it has to do something with regional settings?
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May 10, 2006
I wanted to configure Report Server and publish my reports. I configured report server 2005 on win 2003 os. I prepared few reports and deployed them. When I tried to view this report thru ReportServer (http://localhost/ReportServer) from my local machine, I got the following error message:-
The encrypted value for the "UnattendedExecutionAccountPassword" configuration setting cannot be decrypted.
The report server has encountered a configuration error. See the report server log files for more information.
Can anyone help me in solving this!
I will highly appreciate it.
Thanks in advance,
hemal
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Jan 24, 2008
Hi,
Does any body have a stored procedure or a function I can use? What I need is to encrypt and decrypt a password using Tiny Encryption Algorithm, SO I have an encryption scalar valued function or sproc and similarly decryption function or sproc.Now I need rolling keys to encrypt and decrypt, so I have a table which has keys used for encryption and decryption and depending on the dtae the keys are different.So I alos need a sproc to retrieve the keys.If anybody has done it before or can point me to where can I go let me know?
Thanks
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Dec 2, 2007
I'm trying to put together a proof of concept utilizinf encryption with SQL Server and neded to get a little help. I've got the basics down but I'm not seeing the expected results. Here's the script that I'm running against a very simple table. I'm essentially just adding a coulmn to hose encrypted data, encrypting that data, and then selecting that data - in both encrypted and decrypted form:
Code Block
CREATE CERTIFICATE LAND_ENCRYPT_ACCOUNT3
WITH SUBJECT = 'ExternalAccountID';
GO
CREATE SYMMETRIC KEY AccountID3_01
WITH ALGORITHM = AES_128
ENCRYPTION BY CERTIFICATE LAND_ENCRYPT_ACCOUNT3;
GO
USE [LAND_ENCRYPT];
GO
-- Create a column in which to store the encrypted data.
ALTER TABLE Account
ADD EncryptedAccountID3 varbinary(128);
GO
-- Open the symmetric key with which to encrypt the data.
OPEN SYMMETRIC KEY AccountID3_01
DECRYPTION BY CERTIFICATE LAND_ENCRYPT_ACCOUNT3;
-- Encrypt the value in column NationalIDNumber with symmetric
-- key SSN_Key_01. Save the result in column EncryptedNationalIDNumber.
UPDATE Account
SET EncryptedAccountID3 = EncryptByKey(Key_GUID('AccountID3_01'), ExternalAccountID);
GO
-- Verify the encryption.
-- First, open the symmetric key with which to decrypt the data.
OPEN SYMMETRIC KEY AccountID3_01
DECRYPTION BY CERTIFICATE LAND_ENCRYPT_ACCOUNT3;
GO
-- Now list the original ID, the encrypted ID, and the
-- decrypted ciphertext. If the decryption worked, the original
-- and the decrypted ID will match.
SELECT ExternalAccountID, EncryptedAccountID3
AS 'Encrypted ID Number',
CONVERT(nvarchar, DecryptByKey(EncryptedAccountID3))
AS 'Decrypted ID Number'
FROM Account;
GO
But when I run the "decrypt" the data, the only character that appears unencrypted is the very last character of each account number:
ExternalAccountID Encrypted ID Number Decrypted ID Number
-------------------------------------------------- ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ ------------------------------
12345654444 0x007B9CA28582AC42B36EBD8DFF91434701000000E267255EC20E27E5B4AC03E68C508ADCFA2EB815C234116D54FEE639685D7ECF49BB200140952E45A246AFE83BF53444 ㈱�㘵��4
12312312312 0x007B9CA28582AC42B36EBD8DFF91434701000000DB3838A7C459A2F031B1FFECF2499647C7DE10B7A20171EFDEA68320F7996CCC1C6A45011E93361F9A93494F49311CB9 ㈱ㄳ㌲㈱ㄳ2
12345678901 0x007B9CA28582AC42B36EBD8DFF9143470100000057EEEC0B1E223819EBF8186F0CBFEF8FDF4BFF4C0DCE322FAB8735DC8EA144B5937FFCC745A7FC427282C493DFECD901 ㈱�㘵㠷〹1
The first value is the unencrypted account id, the second is the encrypted account id, the last is the decrypted account id. As you can see, the decrypted value isn't quite right.
I've tried the AES_256, DES, and AES_128 algorithms and they all yield the same result.
Am I missing something?
Also, if I'm going to be inserting into an encrypted column, do I need to do it via a view and a trigger, or can I just do a straight forward INSERT / UPDATE?
Thanks!!!!!
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Oct 30, 2006
Database Security, we are going to use AES 256 Symmetric Encryption. We will be using RSA for Asymmetric Key Encryption, 1024 Bits.
We got the code working for the seond case but for the first, WHEN:
CREATE SYMMETRIC KEY sym_Key WITH ALGORITHM =
AES_256 ENCRYPTION BY ASYMMETRIC KEY asym_Key
GO
THEN:
-- Msg 15314, Level 16, State 1, Line 1
-- Either no algorithm has been specified or the bitlength and the algorithm specified for the key are not available in this installation of Windows.
What can be the way out to be able to create the AES 256 Symmetric key.
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Feb 22, 2001
Is there anyway by which I can decrypt the encrypted Stored Procedures which the Previus DBA had written and its running in Production . I need to make some changes to the Stored Procedure. Is is possible
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Sep 17, 2003
I am planning to use XP_CRYPT for encrypting and decrypting cc#'s, passwords etc., at database level. Any suggestions or experiences on this. More info about this product at
http://www.activecrypt.com/faq.htm
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Apr 21, 2007
I found that while using encryption and decryption by keys and certificates thsere is no security at all.
if we uses master key the sysadmin can decrypt
but if we use private key (encryption by password), how do we pass the password so that profiller didn't show it?
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Jun 15, 2007
Hi
I get a strange error on my SQL Server 2005 database when I try to start replication.
Here is the manipulation leading to my problem:
1. Install new Windows server 2003 and SQL Server 2005 STD, service pack 2.
Server is part of a domain.
SQL2k5 is running under the LocalSystem account on each machine.
2. Get a copy of yesterday's full backup and transaction logs from running production SQL2k5 server.
3. Restore master, model, msdb and other user databases.
4. Try to start replication using the wizard.
I get the following error message
Msg 15466 sp_addlinkedsrvlogin
An error occurred during decryption.
Msg 15185 no remote user distributor_admin
I suspect this problem has to do with master service keys but need some advice. I am not sure it is related to the master restore since it also occurs on the production machine.
What should I do with this error message ?
TIA
Stephane
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Oct 30, 2007
I created stored function with encryption.
after i created i dont able to view the source code from system tables or any tool.
i have get back the original source code
note: i want to stored function not for stored procedure.
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Aug 7, 2006
I try to pass the key used to decrypt symmetric key to a stored procedure as a parameter like this:
OPEN SYMMETRIC KEY MyKey
DECRYPTION BY PASSWORD=@ keypassword;
I get an error message saying "Incorrect syntax near "@keypassword".
Is there something that I am missing?
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Dec 28, 2007
I would like to be able to store user network passwords in a database table and be able to encrypt and decrypt using stored procs. Could anyone give me a pointer on this.
Many thanks
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May 2, 2007
I am attempting to implement tighter security on my instances of SQL Server 2005. One of my tasks is to make sure that the service account for the SQL Server service has the minimum privileges necessary to run the service. I thought I had everything configured correctly, but then I realized that the "SQLServer2005MSSQLUser" Windows group was a member of the "sysadmin" fixed server role. I do not want the service account to be a sysadmin, so I removed the service account from this group.
Everything seemed to be working, until I received a call from one of our developers. He was attempting to execute a stored procedure, and he kept getting the following error: "An error occurred during decryption".
I looked up the error, and found out it is related to the service master key. I am using the same service account that I did when I installed SQL Server, so I am baffled as to why I am receiving this error. The error was resolved when I added the service account back to the "SQLServer2005MSSQLUser" Windows group and restarted the SQL Server service.
Do have any idea what might be happening here?
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May 4, 2006
Hey I had a table with a column of data encrypted in a format. I was able to decrypt it and then encrypt it using Symmetric keys and then updating the table column with the data. Now, there is a user sp which needs to encrypt the password for the new user and put it in the table. I'm not being able to make it work. I have this so far. Something somewhere is wrong. I dont know where. Please help Thanks. I used the same script to do the encryption initially but that was for the whole column. I need to see the encrypted version of the @inTargetPassword variable. But it's not working. It doesn't give me an error but gives me wrong data...
declare @thePassword as varbinary(128)
,@inTargetPassword as varchar(255)
,@pwd3 as varchar(255)
,@theUserId bigint
set @theUserId= 124564
set @inTargetPassword = 'test'
OPEN SYMMETRIC KEY Key1
DECRYPTION BY CERTIFICATE sqlSecurity;
Select @pwd3=EncryptByKey(Key_GUID('Key1')
, @inTargetPassword, 1, HashBytes('SHA1', CONVERT( varbinary, [UserObjectId])))
from table1 where UserObjectId= @theUserId
close symmetric key Key1
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Oct 7, 2015
I have created two user defined functions for encryption and decryption using passphrase mechanism. When I call encryption function, each time I am getting the different values for the same input. While I searching a particular value, it takes long time to retrieve due to calling decryption function for each row.
best way to encrypt and decrypt using user defined functions.Below is the query which is taking long time.
SELECT ID FROM table WITH (NOLOCK)
                    WHERE dbo.DecodeFunction(column) = 'value'
When I try to use symetric or asymetric encryption, I am not able to put "OPEN SYMETRIC KEY" code in a function. So, I am using PassPhrase mechanism.
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Jan 16, 2008
I want to perform column level and database level encryption/decryption....
Does any body have that code written in C# or VB.NET for AES-128, AES-192, AES-256 algorithms...
I have got code for single string... but i want to encrypt/decrypt columns and sometimes the whole database...
Can anybody help me out...
If you have Store procedure in SQL for the same then also it ll do...
Thanks in advance
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Nov 13, 2007
i cann't create the credential.
when i type the user and password. i get error 15466 An error occurred during decryption.
the first time i use this code
Use master
crate credential outs_cred with identity='DomainNameAdministrator',secret='xxxxkmn'
i will get error 15466 An error occurred during decryption.
but i use this code (no secret)
Use master
crate credential outs_cred with identity='DomainNameAdministrator'
i will create the Credential success.
Why??
Best regards,
Mr.Problem
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Apr 20, 2007
My server is a dual AMD x64 2.19 GHz with 8 GB RAM running under Windows Server 2003 Enterprise Edition with service pack 1 installed. We have SQL 2000 32-bit Enterprise installed in the default instance. AWE is enabled using Dynamically configured SQL Server memory with 6215 MB minimum memory and 6656 maximum memory settings.
I have now installed, side-by-side, SQL Server 2005 Enterprise Edition in a separate named instance. Everything is running fine but I believe SQL Server2005 could run faster and need to ensure I am giving it plenty of resources. I realize AWE is not needed with SQL Server 2005 and I have seen suggestions to grant the SQL Server account the 'lock pages in memory' rights. This box only runs the SQL 2000 and SQL 2005 server databases and I would like to ensure, if possible, that each is splitting the available memory equally, at least until we can retire SQL Server 2000 next year. Any suggestions?
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Aug 10, 2007
Hi,
We have an old machine which holds SQL server 2000 database. We need to migrate a whole database to a new machine which has SQL server 2005.
When we tried to move whole database using Import and Export Wizard, only tables can be selected to import/export. However we want to import/export the whole database, including tables, stored procedure, view, etc. Which tool should we use?
Thanks.
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Aug 10, 2007
Hi,
We have an old machine which holds SQL server 2000 database. We need to migrate a whole database to a new machine which has SQL server 2005.
When we tried to move whole database using Import and Export Wizard, only tables can be selected to import/export. However we want to import/export the whole database, including tables, stored procedure, view, etc. Which tool should we use?
Thanks.
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Jun 6, 2007
Hi,
When I am trying to access SQL Server 2000 database from another machine i got this error
Server: MSg 17, Level 16, State 1 [Microsoft][ODBC SQL Server Driver][DBNETLIB]SQL Server does not exist or access denied
but I could access the database on same server and in that server i could access other databases in different server.
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