Not connecting to SQL Server over VPN

Question

I have connected for the first time to an existing network over VPN  I can ping the IP address which is used by the SQL Server from the VPN client  but SSMS does not connect to the SQL Server  I am using the right login id and password   Why could this happen   Any ideas    Thanks

User · Answer

You may not have the UDP port open VPN-forwarded  it s port number 1433   Despite client protocol name of  TCP IP   mssql uses UDP for bitbanging

User · Answer

As long as you have the firewall set to allow the port that your SQL Server instance is using  all you need to do is change Data Source from  Server name to  IP Port  ie  in the connection string use something like this   Data Source 190 190 1 100 1433    You should not have to change anything on the client side

User · Answer

Make sure SQL Server is enabled for TCP IP  someone may have disabled it      This will also help you to check verify the port number the SQL instance is using  in case someone changed it from the default of port 1433      Obviously port 1433  or whatever port SQL is listening on  needs to be unblocked by any firewalls between your machine and the box SQL is running on     To check SQL s network configuration  requires SQL Server Client Tools installed   Start -  Programs -  SQL Server 200x -  Configuration Tools -  SQL Server Configuration Manager  Connect to the machine you need then expand the Tree Item  LHS   SQL Server Network Configuration   then pick instance   You should have four options - Shared Memory  Named Pipes  TCP IP and VIA   You can check that TCP IP is enabled in the RHS window   If you double click TCP IP and hit the  Advanced  tab  you can also view the Port number   Other thoughts   Are you using SQL Authentication or Windows  Domain  authentication      If SQL Authentication  which I assume you are using given you said username and password   are you sure the SQL instance you re connecting to has mixed mode authentication enabled   If not  you have to connect as Administrator and change the default security settings to allow SQL authentication  If Windows Authentication  could your network be using Kerberos potentially   One would think the VPN credentials would be used for the handshake   I d check your account has appropriate login rights

User · Answer

SQL Server uses the TCP port 1433  This is probably blocked either by the VPN tunnel or by a firewall on the server

User · Answer

Check that the port that SQL Server is using is not being blocked by either your firewall or the VPN

User · Answer

Try changing Server name with its IP for example SERVERNAME  SQLSERVER - gt  192 168 0 2  SQLSERVER  its work flawlessly with me using VPN

User · Answer

I have this issue a lot with Citrix Access Gateway  I usually get a timeout error  If you are able to connect to the database from a client on the network  but not from a remote client via VPN  you can forget most suggestions given here  because they all address server-side issues   I am able to connect when I increase the timeout from the default  15 seconds  to 60 seconds  and for good measure  force the protocol to TCP IP  These things can be done on the Options screen of the login dialog

User · Answer

I was having this issue too with SQL Server 2017   I m on the same network as the server via VPN and can ping it  After being frustrated that no authentication method would work - I set up an SSH server on the SQL server - and I was able to connect normally  This confirmed the correct port wasn t being hit for some reason  I even created a new user accounts  domain accounts  firewall checks on both ends  etc     The solution for me was  1  Set Connection to strictly use TCP IP on SSMS 2  Use a custom string to point to the default port  ex  Data Source 192 168 168 166 1433    All the other comments above haven t worked so far  It looks like it was mandatory to include the port  even though its default

User · Answer

When connecting to VPN every message goes through VPN server and it could not be forwarding your messages to that port SQL server is working on    Try  disable VPN settings- Properties- TCP IP properties- Advanced- Use default gateway on remote network   This way you will first try to connect local IP of SQL server and only then use VPN server to forward  you

User · Answer

I also had this problem when trying to connect remotely via the Hamachi VPN  I had tried everything available on the internet  including this post  and it still did not work  Note that everything worked fine when the same database was installed on a machine on my local network  Finally I was able to achieve success using the following fix  on the remote machine  enable the IP address on the TCP IP protocol  like so   On the remote machine  start SQL Server Configuration Manager  expand SQL Server Network Configuration  select  Protocols for SQLEXPRESS   or  MSSQLSERVER    right-click on TCP IP  on the resulting dialog box go to the IP Addresses tab  and make sure the  IP1  element is Active Yes and Enabled Yes  Make note of the IP address  for me it wasn t necessary to modify these   Then stop and start the SQL Server Services  After that  ensure that the firewall on the remote machine is either disabled  or an exception is allowed for port 1433 that includes both the local subnet and the subnet for the address noted in the previous dialog box  On your local machine you should be able to connect by setting the server name to 192 168 1 22 SQLEXPRESS  or  ip address of remote machine   SQL server instance name     Hope that helps

User · Answer

On a default instance  SQL Server listens on TCP 1433 by default  This can be changed  On a named instance  unless configured differently  SQL Server listens on a dynamic TCP port  What that means is should SQL Server discover that the port is in use  it will pick another TCP port  How clients usually find the right port in the case of a named instance is by talking to the SQL Server Listener Service SQL Browser  That listens on UDP 1434 and cannot be changed  If you have a named instance  you can configure a static port and if you have a need to use Kerberos authentication delegation  you should   What you ll need to determine is what port your SQL Server is listening on  Then you ll need to get with your networking security folks to determine if they allow communication to that port via VPN  If they are  as indicated  check your firewall settings  Some systems have multiple firewalls  my laptop is an example   If so  you ll need to check all the firewalls on your system   If all of those are correct  verify the server doesn t have an IPSEC policy that restricts access to the SQL Server port via IP address  That also could result in you being blocked

User · Answer

This is what fixed my connection problem of accessing the SQL Server 2012 Database via VPN With the SQL Server 2012 Configuration Manager  I went to the SQL Server Network configuration Then clicked on the NEW server instance and double-clicked the TCP IP protocol  I had also previously enabled this option and rebooted the server but that did still not fix it  now that the TCP IP was enabled  I noted that all of the IP port slots in the  IP Addresses  tab of the TCP IP Properties advanced dialog were set to Enabled No  I was curious to why my new installation set all of these IP slots to NO rather than Yes  so I just changed them to YES  Now the connection to the sever via VPN works great  I did not change any port numbers  Note  I also had SQL Server 2008 default from the Visual studio 2010 uninstalled  but I do not think that had a direct effect to the TCP IP situation   A coworker told me that the 2008 and 2005 installations which come with visual studio may interfere with SQL 2012

User · Answer

if you re using sql server 2005  start sql server browser service first

User · Answer

When this happens to me  it is because DNS is not working properly   Try using the IP address instead of the server name in the SQL Server login

[sql-server-2005] Not connecting to SQL Server over VPN

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