All ports
Port87/UDP
Port
87
Protocol
UDP
Category
Well-Known
Service
Unassigned
What is port 87?
Port 87/UDP is a Well-Known port, assigned by IANA for widely recognized services. It currently has no assigned service in the IANA registry.
any private terminal link
Useful commands
nmapnmap -p 87 -sV example.comnetcatnc -zv example.com 87curlcurl -v http://example.com:87/telnettelnet example.com 87bash(echo > /dev/udp/example.com/87) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 87/udpDeny
sudo ufw deny 87/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 87 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 87 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=87/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 87" dir=in action=allow protocol=UDP localport=87Security Risks
- Unauthorized access to the service
- Data exposure if the service is unauthenticated
- Outdated versions with vulnerabilities
- Incorrect service configuration
Frequently Asked Questions
What service runs on port 87/UDP?
Port 87/UDP is associated with the Unassigned service. any private terminal link
Is it safe to expose port 87 to the Internet?
It depends on the service and configuration. Port 87 (Unassigned) is a Well-Known port. If you need to expose it, keep the service updated, use strong authentication, and configure a firewall. It's always recommended to restrict access by IP when possible.
How do I check if port 87 is open?
You can use nmap: `nmap -p 87 -sV example.com`, netcat: `nc -zv example.com 87`, or the bash command: `(echo > /dev/udp/example.com/87) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 87 on my firewall?
On Linux with UFW: `sudo ufw allow 87/udp` (open) or `sudo ufw deny 87/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 87 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 87" dir=in action=allow protocol=UDP localport=87`.
What applications and services use port 87?
Port 87/UDP is used by the Unassigned service. Specific uses depend on the software and configuration. Check our related tools section for more information.