Port Checker Tool
Test if a specific port is open and accessible on any host or server. Essential for network troubleshooting, firewall configuration, and service monitoring.
Port Connectivity Test
Check if a specific port is open and accepting connections
Standard ports checked: 22 (SSH), 80 (HTTP), 443 (HTTPS), 21 (FTP), 25 (SMTP), 53 (DNS), 110 (POP3), 143 (IMAP), 993 (IMAPS), 995 (POP3S)
Port Checker Features
Advanced port scanning capabilities for network diagnostics and security testing
TCP/UDP Support
Test both TCP and UDP port connectivity for comprehensive network analysis
Multiple Protocols
Support for HTTP, HTTPS, FTP, SSH, Telnet, and other common protocols
Response Time
Measure connection response time to identify network latency issues
How to Use Port Checker
Simple steps to test port connectivity
Enter Target Host
Type the hostname or IP address you want to test
Specify Port Number
Enter the port number you want to check (1-65535)
View Results
Get instant results with connection status and response time
Common Ports to Check
80 - HTTP
443 - HTTPS
22 - SSH
21 - FTP
25 - SMTP
53 - DNS
3389 - RDP
3306 - MySQL
5432 - PostgreSQL
6379 - Redis
About Port Checking
Port checking is a network diagnostic technique used to test whether specific network ports on a server or device are open and accepting connections.
Why Check Ports
- • Verify firewall configuration
- • Troubleshoot connectivity issues
- • Test network security
- • Validate service availability
- • Debug application problems
- • Monitor server accessibility
- • Audit network security
Port Status Types
- Open: Accepting connections
- Closed: Not accepting connections
- Filtered: Blocked by firewall
- Unfiltered: Accessible but no service
- Open|Filtered: Cannot determine
- Closed|Filtered: Uncertain status
Frequently Asked Questions
Find answers to common questions