Errors in Firebird.log

Firebird log file (firebid.log) can contain a lot of various messages, here you can find the list of most frequent of them, with the explanation of the error.

INET/inet_error: read errno = 10054 SERVER/process_packet: broken port, server exiting

INET/inet_error: send errno = 10053
INET/inet_error: connect errno = 10061
INET/inet_error: connect errno = 10061

WNET/wnet_error: ReadFile end-of-file errno = 109
This error occurs when some client application uses the WNET connection path to the Firebird server instance on Windows, something like this:
This is not recommended, better use TCP/IP connections for network connections (in the format server:path\database.fdb or, on Firebird 3, inet://servername:path\database.fdb), and XNET for local connections (local path on 2.5 and xnet://path\database.fdb).