Zitat von "Mark Rotteveel mark@... [firebird-support]"
<firebird-support@yahoogroups.com>:

> On 19-4-2018 20:03, Lukas Gradl firebird@... [firebird-support] wrote:
>> I work from a debian linux machine having installen the 3.0.1 client
>> libs from the repository and flamerobin from the repository.
>>
>> One of the machines I have to connect to regularily runs 1.5.5 on
>> debian linux.
>>
>> Since upgrading the client to version 3 I can't connect anymore - I
>> get a "connection rejected by remote interface"
>>
>> Unfortunatly upgrading the server is not an option.
>>
>> I can connect to servers running 2.5 without any problems and I could
>> connect to that 1.5 server too before upgrading the client.
>>
>> Anyone an idea why I can't connect to that 1.5 server with the current libs?
>
> Is there a firebird.conf in the same location as the libfbclient in
> question? If so, what is its value of AuthClient, and of WireCrypt?
>
> I also vaguely recall an issue with Firebird 3.0.1 where it would
> terminate authentication early in some situations (but I thought that
> was server-side, not client-side). You might want to upgrade to Firebird
> 3.0.3 and check if that works.
>
> Mark
> --

Tried it with a 3.0.3 lib - same problem

Then created a firebird.conf (copied over the one from the server package).

For AuthClient I tried:
AuthClient = Srp, Win_Sspi, Legacy_Auth
AuthClient = Legacy_Auth, Srp, Win_Sspi

and for WireCrypt

WireCrypt = enabled
WireCrypt = disabled

But the problem persists...

Thanks for help,

Lukas