Quote from CalTrader:
The problem is with the implementation itself: Often the software of these companies requires the ability to randomly obtain a port number on which to either communicate or receive data over a particular block of port numbers.
These are very poor requirements: In a corporate network it would require - somewhere on either a router, firewall or both - a block of open ports with no security handshake. This is a BIG problem for network security.
A simple solution would be for the software to asssign SPECIFIC ports for use by a SPECIFIC account: believe me this is not hard to implement even in a very high volume scenario.
Most likely these companies have no talent - or budget to hire talent - to accomplish these improvements, and in an attempt to further cut costs and achieve margins they are unwilling to put any investments into their systems. As a result they lose customers - of course these dont appear directly on any financial statement and thus nobody on their boards objects.
