> Sunday, August 6, 2017, 7:07:02 PM, you wrote:
>

Hi Helen

>> On a brand new install for Firebird 2.5.7 (x86) I am having issues
>> connecting to the server via TCP/IP.
>> The error message is always the same "Connection rejected by remote
>> interface" however I have tried several DB utilities and I can connect
>> fine via local protocol but not via network address.
>
>> I'm suspecting a library issue (conflicting fbclient.dll or gds32.dll)
>> but
>> for the love of God I have been unable to find it anywhere on the
>> system.
>
>> Anyone have any tips on the issue?
>
> To ask the obvious, is port 3050 open on the server?

Yes, port 3050 is correctly open and listening on all local interfaces.
I have tried changing the port to 30500 but I'm still getting the same
message.

>
> How would you recognise "a conflicting fbclient.dll or gds32.dll"?

I believe the error message is returned by the firebird server itself,
meaning the connection was established successfully but something else is
failing further down.
I'm not sure exactly what though: authentication process, fdb file or other?

>
> Did you actually replace the client lib on the remote box with the
> appropriate-bitness one from the installation?

System is x64 but x86 version of firebird is required due to legacy UDF.
I have tried deleting the DLLs from System32 and SysWOW64 to avoid PATH
issues but that didn't have any effect.