![]() He has been running video game servers from home for more than 10 years using Windows, Ubuntu, or Raspberry Pi OS. Nick's love of tinkering with computers extends beyond work. In college, Nick made extensive use of Fortran while pursuing a physics degree. Before How-To Geek, he used Python and C++ as a freelance programmer. He has been using computers for 20 years - tinkering with everything from the UI to the Windows registry to device firmware. If you've any feedback/suggestion for this website, please let me know.Nick Lewis is a staff writer for How-To Geek. 995 - POP3S (Post Office Protocol 3 over SSL).993 - IMAPS (Internet Message Access Protocol over SSL).873 - RSYNC (RSYNC File Transfer Services).554 - RTSP (Real Time Stream Control Protocol).465 - SMTPS (Simple Mail Transfer Protocol over SSL).443 - SSL / HTTPS (Hypertext Transfer Protocol Secure).161 - SNMP (Simple Network Management Protocol).143 - IMAP (Internet Message Access Protocol).115 - SFTP (Secure File Transfer Protocol).80 - HTTP (Hypertext Transfer Protocol).25 - SMTP (Simple Mail Transfer Protocol).1-1023 - Well-known ports (e.g., HTTP, SMTP, DHCP, FTP).Port numbers range from 1 to 65535, and they're categorized into three groups: ![]() If you host games like Minecraft, use this checker to ensure your server port (25565) is configured correctly for friends to connect. ![]() It's also handy for security-check whether a port is open or closed. This tool can help diagnose firewall issues. If you're experiencing connection problems with a program (like email or instant messaging), it could be because your router's firewall or your ISP is blocking the required port. It's useful for testing port settings on your router. Port Checker | Port Scanner is a free online tool for checking open ports on your device. ![]()
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