Port Number 5353/udp | What is Port 5353/udp?
A Software Port (usually just called a 'port') is a virtual data connection that can be used by programs to exchange data directly, instead of going through a file or other temporary storage location. The most common of these are TCP and UDP ports which are used to exchange data between computers on the Internet.
Port 5353/udp uses the mdns protocol for service type mdns. A malformed request to port 5353/udp is known to cause denial of service attacks.
In the TCP and UDP protocols used in computer networking, a port is a special number present in the header of a data packet. Ports are typically used to map data to a particular process running on a computer. Port numbers can occasionally be seen in the URLs of websites. By default, HTTP uses port 80 and HTTPS uses port 443, but a URL like http://www.MyCompany.com:8000/ would try to connect to an HTTP server on port 8000 instead. Port 5353/udp is used for the mdns service. An example would be http://www.MyCompany.com:5353/udp/ when accessed by a web service. Port 5353/udp may be used for several services including Multicast DNS and more. Port 5353/udp is known to have vulnerabilities caused by trojans and remote code execution.
Note that not all transport layers use network ports; for example, although UDP and TCP use ports, ICMP does not. By default, the firewall should disallow traffic to port 5353/udp until all security checks have been passed. If an application cannot listen on port 5353/udp, the port 5353/udp is already in use by another application causing the conflict.
Port Number: 5353/udp (Windows 7/Windows Vista/ Windows XP/Windows Server family)
Protocol Used : mdns
Service Type : mdns
Known Port 5353/udp exploits: Yes
Known Port 5353/udp Security Risks: Yes
Information on Port 5353/udp: Windows 7/Vista/XP
- Go to the command prompt (Start>Run>cmd)
- Enter netstat -ano
- You will get a report of Active Connections
- Report includes: Protocol, Local Address, Foreign Address, State, PID
- Proto Local Address Foreign Address State PID
- UDP 127.0.0.1:5353/udp *:* 5353/udp
- Write down the PID (process identifier) associated with port 5353/udp (Also note the Local Address, Foreign Address, Protocol and State.)
- Next, start the Windows Task Manager
- Select the Processes tab in Task Manager
- Search for the PID you wrote down previously
- netstat parameter -s displays per-protocol statistics. By default, statistics are shown for IP, IPv6, ICMP, ICMPv6, TCP, TCPv6, UDP, and UDPv6
How to manually open Port 5353/udp in Windows Firewall?Windows Firewall may block port 5353/udp by default. If you want to allow a program to communicate using Port 5353/udp through the firewall, you can usually do that by selecting the required program on the Exceptions tab in Windows Firewall. However, sometimes the program is not listed in the Exceptions tab. In this case you need to open the port manually.
1.Open Windows Firewall by clicking Start, Control Panel, Security, and then Windows Firewall.
2.Click 'Allow a program through Windows Firewall'.
3.Click 'Add port'.
4.In the 'Name' field, type a friendly name for the port like 'Port-5353/udp'.
5.In the 'Port number' field, enter the port number '5353/udp'.
6.Select TCP or UDP, depending on the protocol required for port 5353/udp.
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