![Hack: Using ssh / curl or wget to test TCP port connection state to remote SSH, DNS, SMTP, MySQL or any other listening service in PCI environment servers - ☩ Walking in Hack: Using ssh / curl or wget to test TCP port connection state to remote SSH, DNS, SMTP, MySQL or any other listening service in PCI environment servers - ☩ Walking in](https://www.pc-freak.net/images/using-curl-ssh-wget-to-test-tcp-port-opened-or-closed-for-web-mysql-smtp-or-any-other-linstener-in-pci-linux-logo.png)
Hack: Using ssh / curl or wget to test TCP port connection state to remote SSH, DNS, SMTP, MySQL or any other listening service in PCI environment servers - ☩ Walking in
![TomNomNom on Twitter: "No telnet or netcat/nc? Use curl with telnet://host: port :) https://t.co/b3lMJy2aee" / Twitter TomNomNom on Twitter: "No telnet or netcat/nc? Use curl with telnet://host: port :) https://t.co/b3lMJy2aee" / Twitter](https://pbs.twimg.com/media/EGwl_yjWoAEG44I.jpg:large)
TomNomNom on Twitter: "No telnet or netcat/nc? Use curl with telnet://host: port :) https://t.co/b3lMJy2aee" / Twitter
![deployment: curl localhost connection refused · Issue #78 · tiangolo/full-stack-fastapi-postgresql · GitHub deployment: curl localhost connection refused · Issue #78 · tiangolo/full-stack-fastapi-postgresql · GitHub](https://user-images.githubusercontent.com/7061275/69071979-8831fd80-09f0-11ea-98be-e6132d6a04f4.png)
deployment: curl localhost connection refused · Issue #78 · tiangolo/full-stack-fastapi-postgresql · GitHub
![python - Curl "Connection Refused" when connecting to server with external IP address - Stack Overflow python - Curl "Connection Refused" when connecting to server with external IP address - Stack Overflow](https://i.stack.imgur.com/GULGI.png)
python - Curl "Connection Refused" when connecting to server with external IP address - Stack Overflow
![CURL : Alternative for telnet tool to check listening port state in Linux/Windows - Multi Tech Buzz!! CURL : Alternative for telnet tool to check listening port state in Linux/Windows - Multi Tech Buzz!!](http://www.multitechbuzz.com/wp-content/uploads/2019/12/telnet.png)
CURL : Alternative for telnet tool to check listening port state in Linux/Windows - Multi Tech Buzz!!
![terminal - brew upgrade MacOs 11.3.1 error message curl: (7) Failed to connect to ghcr.io port 443: Bad file descriptor - Stack Overflow terminal - brew upgrade MacOs 11.3.1 error message curl: (7) Failed to connect to ghcr.io port 443: Bad file descriptor - Stack Overflow](https://i.stack.imgur.com/AnFLk.png)