blackjack. Purpose: network blackjack. Description: Microsoft operating systems tend to allocate one or more unsuspected, publicly exposed services (probably.
blackjack. Purpose: network blackjack. Description: Microsoft operating systems tend to allocate one or more unsuspected, publicly exposed services (probably.
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However, any good stateful personal firewall, such as Zone Alarm and probably others, ought to block these low-numbered ports automatically. If you are reading this page because our port analysis has revealed that you have open ports lying between and , it would certainly be in your best interests to configure your personal firewall to block incoming connection requests TCP SYN packets to those low-numbered ports. This is trivial to do, but Microsoft doesn't bother. And, of course, placing any network behind a NAT router provides extremely good hardware firewall protection for your system s.{/INSERTKEYS}{/PARAGRAPH} If Microsoft wants to allow DCOM services and clients operating within a single machine to inter-operate, that's fine. GRC's web and customer privacy policy. Otherwise you may find that the first several outbound connection attempts made by Windows will fail because returning traffic has been blocked at your firewall. This would allow DCOM packets complete local freedom, but they would expire immediately after crossing one or two router hops. The contents of this page are Copyright c Gibson Research Corporation. But in that case the DCOM service ports should be "locally bound" so that they are not wide open and flapping in the Internet breeze. Unfortunately, since Windows initially initiates outgoing connections from this same low-numbered port range as the first ports it uses immediately after booting , you may need to be careful with the configuration of your firewall rules. The point is, there are many things Microsoft could easily do if they had any true concern for, or understanding of, Internet security. The most distressing aspect of this, is that these service ports are wide open to the external Internet. {PARAGRAPH}{INSERTKEYS}Gibson Research Corporation is owned and operated by Steve Gibson. Goto Port Probe Port Enter Port: Port Authority Database Port Name:. Who knows what known or unknown, discovered or yet to be discovered vulnerabilities already exist those exposed servers and services?