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Blocking not in use ports is part of security in depth (or layered security) it makes it harder for an attacker to find unintentional publicly accessible services. And if an attacker manages to access the server through some exploit to not have an easy way to create a reverse shell. It also makes it so that your server has less things to do (than ...


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**Theoretically speaking just having an open port is not bad. It actually depends on the vulnerability of the application listening to this port. ** That being said, having more ports open, increases the probability of your system being discovered, and the chances of being exploited increases with the increase in the number of vulnerable applications ...


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This can be because of many reasons. Such as the following: Network Layout Antivirus Software IDS/IPS Intermediate Network Devices The version of your Nmap's ..etc In your case, it seems like you are using your MAC OS as the host. While Kali Linux is a VM with the MAC host. If you have an Anti Virus software or Strict Firewall rules enabled, they could be ...


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If you are running a computer without a firewall that only allows access to approved services, then yes, anyone on your local network could connect to this service. The developers of a service do not have to assume that their service is not vulnerable. They only need to assume that the people running their service have a minimum of security on the machine ...


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What is an "open port"? An "open port" is actually a bit misleading. People tend to think of their computer as a solid wall, and of an "open port" to be akin to a hole in the wall. What an open port actually is is an application on your computer listening to network traffic. So for example, if you run a game server on your computer (e.g. Minecraft, Unreal ...


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Ports are not the issue. It's the service running on those ports. Services like a web server, an email server, a game server, or whatever. Services should only be open to the Internet if they are supposed to be public like that, so there are firewalls that you can use to block those ports from going to certain places but allow access to other places, like ...


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