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 getting this error on windows and ubuntu 16.4 · Issue #3035 · Kong/kong · GitHub
Testing port connectivity from vCenters and Hosts | Electric Monk
Ubuntu 18.04 - Issues and curl: (7) Failed to connect to localhost port 8888: Connection refused · Issue #25 · EOSIO/eosio-project-demux-example · GitHub
curl - Failed to connect port 80 connection refused - Stack Overflow
Mastering curl: interactive text guide
Nicolas Grégoire on X: "bash + curl = port scanner. Useful on a compromised container 😈" / X