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Thanks to colst for the suggestions, which I implemented, and which made me think further about what could be the problem.
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Thanks to colst for the suggestions, which I implemented, and which made me think further about what could be the problem.

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I have a connection string in a Visual Studio 2008 apps querying a Firebird SQL database.<br />
<br />
It works perfectly when the target IP address is a Server 2003 machine. &nbsp;The exact same connection string fails to connect when the target server is a Server 2008 machine.<br />
<br />
The string is: &lt;add name=&quot;connectme&quot; connectionString=&quot;Server=n<wbr />n.nn.nnn.n<wbr />nn;databas<wbr />e=d:\\supp<wbr />ort\\check<wbr />intest\\di<wbr />ary.gdb;us<wbr />erid=sysdb<wbr />a;password<wbr />=masterkey<wbr />&quot; providerName=&quot;FirebirdSql.<wbr />Data.Fireb<wbr />irdClient&quot;<wbr />/&gt;<br />
<br />
I have tried disabling windows firewall<br />
I have tried disabling Symantec endpoint protection firewall<br />
I have added firewall rules to allow the source IP to be permitted to access the target server<br />
I have added firewall rules to ensure that port 3050 for firebird is open on the public WAN<br />
<br />
What could be the issue?
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I have a connection string in a Visual Studio 2008 apps querying a Firebird SQL database.

It works perfectly when the target IP address is a Server 2003 machine.  The exact same connection string fails to connect when the target server is a Server 2008 machine.

The string is: <add name="connectme" connectionString="Server=nn.nn.nnn.nnn;database=d:\\support\\checkintest\\diary.gdb;userid=sysdba;password=masterkey" providerName="FirebirdSql.Data.FirebirdClient"/>

I have tried disabling windows firewall
I have tried disabling Symantec endpoint protection firewall
I have added firewall rules to allow the source IP to be permitted to access the target server
I have added firewall rules to ensure that port 3050 for firebird is open on the public WAN

What could be the issue?

Server 2008 rejects connection that Server 2003 accepts

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