![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
curl: (7) Failed to connect to 20.245.88.48 port 80 after 1 ms: Couldn't connect to server - Microsoft Q&A
![curl (7) failed to connect to localhost port 8001 connection refused - Installation/Setup - Kong Nation curl (7) failed to connect to localhost port 8001 connection refused - Installation/Setup - Kong Nation](https://global.discourse-cdn.com/standard10/uploads/konghq/optimized/1X/aa649e2bd03ddc44002432e178bfca0358080fc7_2_690x387.png)
curl (7) failed to connect to localhost port 8001 connection refused - Installation/Setup - Kong Nation
![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)
terminal - brew upgrade MacOs 11.3.1 error message curl: (7) Failed to connect to ghcr.io port 443: Bad file descriptor - Stack Overflow
![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
![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)