Opened Port But Still Closed

Opened ports but still closed

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I desactivated my private firewall on windows and my port is still close. I desactivated my antivirus but the port is still closed. I used different port and static address but the port is still closed. I do not know what to do, so please help me. I provide all the screen shots Thanks. If you are behind a ISP’s modem/router and have not configured any of your ports to be open to the outside then this would be the correct configuration. Although you can get out through your firewall and the response data back because it is a requ. Check a port's status by entering an address and port number above. The open port checker is a tool you can use to check your external IP address and detect open ports on your connection. This tool is useful for finding out if your port forwarding is setup correctly.

If your firewall(s) is blocking the connections, than you should find references in your firewall logs. No connection should be blocked, without creating a log line.

So I think, it would be best, to inspect the logs of your firewalls to find the one that is blocking the connections.

You could also do some packet capturing behind the first firewall, to see, if the connection requests came trough the first one and than focus on the second firewall, if they did - or research the config of the first firewall, if they did not.

Opened Port But Still Closed

On WatchGuard firewalls, we have a tool called 'real time traffic monitor', that gives us information about all logged connections in real time. Since denied ones are logged by default, we can see the connection being blocked, together with the reason why the firewall has blocked it. Makes it easy to troubleshoot such cases. I don't know if you have something like that on PAN or ASA (afraid not?).

Check for open ports and verify port forwarding setup on your router.

What is Port Checker ?

Port Checker is a simple and free online tool for checking open ports on your computer/device, often useful in testing port forwarding settings on a router. For instance, if you're facing connection issues with a program (email, IM client etc) then it may be possible that the port required by the application is getting blocked by your router's firewall or your ISP. In such cases, this tool might help you in diagnosing any problem with firewall setup. You could also find this useful for security purpose, in case you're not sure whether a particular port is open or closed. If you host and play games like Minecraft, use this checker to make sure the server port(25565) is configured properly for port forwarding, then only your friends will be able to connect to your server.

Most Commonly Used Ports

Opened

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Port numbers ranges from 1 to 65535, out of which well known ports are pre-defined as convention by IANA.

  • 0-1023 - Well known ports (HTTP, SMTP, DHCP, FTP etc)
  • 1024-49151 - Reserved Ports
  • 49152-65535 - Dynamic/Private Ports

Opened Port But Still Closed Christmas Day

Well known ports

  • 20 & 21 - FTP (File Transfer Protocol)
  • 22 - SSH (Secure Shell)
  • 23 - Telnet, a Remote Login Service
  • 25 - SMTP (Simple Mail Transfer Protocol)
  • 53 - DNS (Domain Name System)
  • 80 - HTTP (Hypertext Transfer Protocol)
  • 110 - POP3 (Post Office Protocol 3)
  • 115 - SFTP (Secure File Transfer Protocol)
  • 123 - NTP (Network Time Protocol)
  • 143 - IMAP (Internet Message Access Protocol)
  • 161 - SNMP (Simple Network Management Protocol
  • 194 - IRC (Internet Relay Chat)
  • 443 - SSL / HTTPS (Hypertext Transfer Protocol Secure)
  • 445 - SMB
  • 465 - SMTPS (Simple Mail Transfer Protocol over SSL)
  • 554 - RTSP (Real Time Stream Control Protocol)
  • 873 - RSYNC (RSYNC File Transfer Services)
  • 993 - IMAPS (Internet Message Access Protocol over SSL)
  • 995 - POP3S (Post Office Protocol 3 over SSL)
  • 3389 - RDP (Remote Desktop Protocol)
  • 5631 - PC Anywhere
  • 3306 - MySQL
  • 5432 - PostgreSQL
  • 5900 - VNC
  • 6379 - Redis
  • 11211 - Memcached
  • 25565- Minecraft

If you're looking for a full list of port numbers check out this wikipedia page. I've listed all the common ports above, feel free to enter any custom port number to check. By default, this site is taking your device's IP address as target ip address (the device through which you're visiting this web page), but you can change the IP input field to check for other IP addresses - remote clients and servers as well. But, please don't misuse this option otherwise, I would have to restrict the IP address to source again (as I had done earlier). Please keep in mind that if you're using a VPN or proxy server then it may not be able to get your device's IP correctly.

Understanding Port Forwarding

Port forwarding or port mapping involves translating the address (or port number to a new destination), accepting the packets and forwarding it (using routing table). It's typically used in connecting remote computers to specific programs running on computer (in a private LAN (Local Area Network)). For example : running a public server (HTTP, port 80) on a computer in a private LAN or granting SSH access to a specific computer in a private LAN etc. Read More on Wikipedia.

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