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How do I disable port 5357?
This port is opened probably because you have Network Discovery enabled in a Public Network profile.
- Go to Control Panel\Network and Internet\Network and Sharing Center\Advanced sharing settings.
- Disable Network Discovery on your Home Network and Public Network.
- (Not sure if you need a reboot)
Should I block port 5357?
Disabling Network Discovery for any public network profile should close the port unless it’s being used by another potentially malicious service. WSD communicates over HTTP (TCP port 5357), HTTPS (TCP port 5358), and multicast to UDP port 3702.
How does a port scanner know whether a port is open?
It does this by simply sending a request to each port and asking for a response. In its simplest form, the port-scanning software asks about each port, one at a time. The remote system will respond and say whether a port is open or closed. The person running the port scan would then know which ports are open.
Does nmap show open ports?
You’ll use the netstat program to identify open ports, and then use the nmap program to get information about the state of a machine’s ports on a network. When you’re done you’ll be able to identify common ports and scan your systems for open ports. Note: This tutorial covers IPv4 security.
What port is 5357 used for?
By default, WSDAPI will listen on TCP ports 5357 and 5358. The Windows Firewall will allow messages in to these ports if the interface firewall profile is anything other than Public.
Why does Nmap show closed ports?
A closed port is accessible (it receives and responds to Nmap probe packets), but there is no application listening on it. They can be helpful in showing that a host is up on an IP address (host discovery, or ping scanning), and as part of OS detection.
Why does Nmap consider Port 5357 as open?
In your scenario, it might very well be that port 5357 on one specific host (e.g. 203.0.113.29) is closed. nmap would still consider it as “open”, because a request for 203.0.113.29:5357 would receive a response. nmap is simply not able to tell whether or not the response came from the host or not. How can I make sure this is what is happening?
What should Nmap not do after host discovery?
This option tells Nmap not to do a port scan after host discovery, and only print out the available hosts that responded to the host discovery probes. This is often known as a “ping scan”, but you can also request that traceroute and NSE host scripts be run.
Why does port 5357 appear to be open?
For example, a firewall, router or switch may be configured to forward any traffic to TCP port 5357 to 203.0.113.1:5357. As a result, when conducting a port scan for any host in this network, TCP port 5357 appears to be “open” for every host, but in reality, every request is answered just by one host.
How does Nmap detect ports with Ping disabled?
Need to perform this for host discovery on few assets which has ping disabled. Eg: A particular asset has 80,443,445 enabled. Nmap detects port 80 open, doesn’t probes 443,445 ports, instead moves on to the next defined target. This is exactly how Nmap’s host discovery works.