I am using SQL server express 2014. I used the below connection string as server name in SQL Express. but it failed.
[my servername],1433\SQLEXPRESS
In sql server 2012, I can connect the connection string in the format of [my servername],1433
Could you please anyone suggest how do I specify a port number in a connection string for SQL Express server?
First of all, if you did not change the port manually, SQLEXPRESS is NOT listening on 1433 that is reserved for default instance, it uses dynamic port that you can find in Configuration Manager or in SQL Server error log.
Here you can see both methods with pictures: Identify SQL Server TCP IP port being used.
Second, there is no need to specify instance name + port, in fact if you do it, instance name is effectively ignored, so when you use
[my servername]\SQLEXPRESS,1433
you'll try to connect to
[my servername],1433
That is because to connect to server you need to know it's address and port, so or you use
myServer,port
or you use
myServer\instanceName
In the first case the underlying network library has all information it needs to connect(IP + port). In the second case SQL Server Browser need to be started.
It's SQL Server Browser that will comunicate instance port given instance name.
When your connection string contains both instance name and port, only port is used and instance name is ignored, so if you use a wrong port, even with correct instance name you cannot connect.
put the port after the instance name, like:
[my servername]\SQLEXPRESS,1433
Have in mind that if SQL Express is the only SQL server in this PC you can also use:
[my servername],1433 or [serverIP],1433
Related
I have a problem at my company where the SQL Server names that were set up are really inconsistent and i'm trying to fix it while redoing these servers. I basically have 3 servers with different names and I'd like to use the one that just requires the server name. For example:
Server 1:
ServerName: MDGSQLP01\MDG
InstanceName: MDG
Server2:
ServerName: MDGSQLP02
InstanceName:
Server3
ServerName: MDGSQLP03/MDGSQLP03
InstanceName: MDGSQLP03
So when I connect to all of these I have to use the server name obviously. I would rather that these all be named like Server2 so my connection string is always just, MDGSQLP0_ . Anyone know how this is done? Do I need to uninstall the server to be able to drop the instance name?
To connect to all servers in a consistent way, instead of changing the instance name you can change the port number, so they all have the same value. If you make this new value the default port number (1433) you can connect without having to specify instance name or port number.
Open SQL Server Configuration Manager.
Select SQL Server Network Configuration.
Select the instance to configure.
Right click TCP/IP protocol .
Select Properties.
Select IP Addresses tab.
Change the port number to 1433.
NB: This means you can't use dynamic port numbers (which use the SQL Browser service to resolve a request using instance name to the relevant port number). This has a few disadvantages:
Port sniffers are more likely to spot the instance if running on a default port.
If some other application on the server uses this port before SQL does, SQL is not able to find a free alternative port to use.
However, these issues are generally not a significant concern.
I forwarded port 1433 to 9082 on my server, at firewall set to allow for inbound and outbound, at SQL Server Allow Remote is ON.
But, I can't connect to my SQL Server from client.
I installed SQL Server 2012.
A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 25 - Connection string is not valid)
Solution to problems connecting to MS SQL server with Microsoft SQL Server Management Studio if your port is forwarded
I had problem with this as well. It's been bugging me for days now. Finally I stumbled on solution on this page so I'll exclude it as screenshot:
It's not : like in all other systems, you have to put ,
First off check in the ERRORLOG the port used by SQL Server (there is no guarantee it will always listen on 1433, or if TCP is enabled at all).
In the ERRORLOG, at startup, you will find a line like this one:
In my case the port is indeed 1433 but yours may be different. If needed, you can change it using the SQL Server Configuration Manager.
Secondly, if you are forwarding a port to a different one (like your example from 1433 to 9082) you are in fact disabling the SQL Server Browser. This happens because SQL Server Browser does not know of your port forward so it will tell the clients to connect to 1433 (supposing you are allowing UDP 1434 otherwise you won't be able to reach SQL Server Browser at all).
You can connect to a SQL Instance without using the SQL Server Browser though, all you need is to specify the port in the connection string (without the instance name, if any).
For example, if your instance is called MYSERVER/INST your connection string will be something like:
User ID=*****;Password=*****;server=tcp:MYSERVER,9082
Also make sure to configure your SPNs manually otherwise Kerberos won't work.
You can find more details on how to compose the right connection string here: SqlConnection.ConnectionString Property.
try config your router first. after all connect. Btw, already enable TCP/IP #sql yet or not?make sure open port for sql.
check on sql configuration enable or not for open connection
check firewall open or not
check router open or not
check connection lag or not(if network). local no need
make sure sql browser and agent run(for xp if not xp just enable sql browser)
if not all there maybe you wrong installation. if for network work install local/system. not network(this for attach #server cluster)
I am having an issue connecting to a SQL server instance with management studio over VPN. I can connect to the default instance (i.e. SERVERNAME) over the VPN connection but I cannot connect to another instance on the same server (i.e SERVERNAME\INSTANCE) over the same VPN connection. All of the settings are the same in SQL Configuration manager.
Additionally, I can connect to the named instance just fine from any box "inside" the network. The error I am receiving is a general, "A network-related or instance-specific error occurred... Error 26."
Thanks
EDIT: I should also point out that I can use IPADDRESS to connect, but IPADDRESS\INSTANCE does not work.
To (partially) resolve the situation you need to choose from one of these workarounds when connecting over VPN:
Enable and use SQL Server Authentication instead of Windows Authentication and a static port for the SQL Server instance (always specifying the port value in the connection string);
Use a static port for the SQL Server instance (always specifying the port value in the connection string), enable that TCP port in your server firewalls, and specify the public server name or its external IP address (provided that it is exposed outside the local network);
Enable trust between your source and destination domains (not applicable for connections “on the fly”).
Personally I decided to use the first workaround as it was the easier to implement and the most secure however If the problem persists, 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.
I have a named instance of SQL Server Express that I want to make it visible on the network. I was able to do it, but other machines can only connect to it specifying the port number, even though it is the default port.
For example, other machines can connect to mine using (1433 is the default port for SQL Server):
<hostname>\<instancename>,1433
But other machines can't connect without using the port:
<hostname>\<instancename>
I checked the Firewall (other people can connect specifying the door), and SQL Server Browser is running (I don't fully understand but I read that it make some difference).
Any tips? Thanks.
If you're running on the default port try connecting to the host name without the instance name attached.
If you have named instances and don't want to declare your ports then you need to ensure that SQL Server Browser is running. go and check "sql server configuration manager"
I need to setup a JDBC connection string to SQL Server.
This question is similar to the the C# ADO.Net connection question. This one is specific to JDBC connection strings.
The usual format for the JDBC string is "jdbc:sqlserver://{host}:{port}".
Now, for a SQL server cluster I have a cluster name vvv\iii ({virtual server}{instance name}).
There's no problem setting up an ODBC connection through the "New Data Source to SQL Server" wizard when using the vvv\iii string as the server name. However it seems the JDBC connection string requires a specific host and port.
Is there a way to make a JDBC connect string to a SQL Server cluster?
it turns out that you can use the "instanceName" property within the JDBC string, as documented on the Microsoft Technet page in section "Named and Multiple SQL Server Instances". What worked in my case was the following string for virtual server vvv and database instance name iii:
"jdbc:sqlserver://vvv;instanceName=iii"
When using a SQL Server named instance in a cluster or stand alone environment each SQL Server instance is dynamically assigned a port number on startup. The SQL Server Browser server handles requests to each instance because each server restart could change the port number used by each instance. The first instance to start on a server reboot gets assigned 1433 but there is no guarantee if you have 2 instances that one of them will always get 1433. There are several veriables that affect the startup and recovery time it takes for an instance to start. This can change each time.
That being sad... when connecting to a named instance the jdbc connection string should look like this:
jdbc:sqlserver://server_name/db_name;instance=instance_name
rather than this
jdbc:sqlserver://server_name:1433/db_name;instance=instance_name
note that the default database "/db_name" is optional. If exclued the connection will use the default database assigned to the SQL Server login.
The cluster resource has a host name and a listening port. Use jdbc:sqlserver://{virtualserver}:1433 (or the appropriate listening port if not listening on the default one).
I'd comment Mark Stewart's remark, but the reputation is lacking. My source doesn't mention /db_name and I can't get it to work either. Maybe another case of confused instance names?
Make sure you leave the port definition off as the cluster determine this for you.
So my datasource definition looks like:
jdbc:sqlserver://sqlcluster_hostname\instancename;DATABASENAME=databasename;sendStringParametersAsUnicode=false;SelectMethod=direct
I ran into this issue while trying to setup a Railo datasource to connect to MSSQL cluster.
Slightly off topic ... The standard Railo datasource MSSQL driver option sets the port to "-1" if you leave the port field empty however if you set it to "0" then it removes the port definition altogether and then everything works. But the best way is to choose 'Other - JDBC Driver' to define the JDBC connection string in full as above.