Hello, Walter!

Thursday, May 30, 2013, 3:20:13 PM, you wrote:

W> I had to use a Windows 7 machine as Firebird server...after
W> updating firewall rules everything is ok, but Firebird seems to ignore the aliases.conf
W> file...I place the fdb file in a shared folder, with full access
W> granted to everyone, and create the alias.

why, why, why?!?!? :-)
Firebird isn't a file server, it's a client-server technology.
Nobody needs to have shared access to database file to access data.
Only Firebird needs access to it. So, no shared folders, files, etc.

W> I can access the database locally providing
W> the full path, by if I try to use the alias I got this error:

W> Unsuccessful execution caused by a system error that precludes
W> successful execution of subsequent statements.
W> I/O error during "CreateFile (open)" operation for file "XFILES".
W> Error while trying to open file.

sure, this is CORRECT.
And, you did wrong adding shared folder to aliases.conf.

--
Dmitry Kuzmenko, www.ib-aid.com