The common solutions for defining exceptions for incoming connections in order to have access to internal data (e .g. customer portal, field staff, home office) are always combined with a high administrative effort.
It is often a tedious process to obtain and manage appropriate port approvals.
What of course should not be disregarded, is that more exceptions in the firewall mean a higher risk of serious security vulnerabilities.
Security vulnerabilities will be eliminated and the administrative effort is set to the absolute minimum by the concept of Cordaware bestproxy which realizes incoming requests only through outgoing connections.
Therefore outgoing exceptions for incoming connections are totally unnecessary.