All ports
Port677/UDP
vppPort
677
Protocol
UDP
Category
Well-Known
Service
vpp
What is port 677?
Port 677/UDP is a Well-Known port, assigned by IANA for widely recognized services. It is associated with the vpp service.
Virtual Presence Protocol
Useful commands
nmapnmap -p 677 -sV example.comnetcatnc -zv example.com 677curlcurl -v http://example.com:677/telnettelnet example.com 677bash(echo > /dev/udp/example.com/677) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 677/udpDeny
sudo ufw deny 677/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 677 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 677 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=677/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 677" dir=in action=allow protocol=UDP localport=677Security 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- Outdated versions with vulnerabilities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 677/UDP?
Port 677/UDP is associated with the vpp service. Virtual Presence Protocol
Is it safe to expose port 677 to the Internet?
It depends on the service and configuration. Port 677 (vpp) 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 677 is open?
You can use nmap: `nmap -p 677 -sV example.com`, netcat: `nc -zv example.com 677`, or the bash command: `(echo > /dev/udp/example.com/677) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 677 on my firewall?
On Linux with UFW: `sudo ufw allow 677/udp` (open) or `sudo ufw deny 677/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 677 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 677" dir=in action=allow protocol=UDP localport=677`.
What applications and services use port 677?
Port 677/UDP is used by the vpp service. Specific uses depend on the software and configuration. Check our related tools section for more information.