방화벽 오픈 유무 확인

vCenter

https://knowledge.broadcom.com/external/article/316607/using-curl-to-test-port-connectivity-in.html

curl -v telnet://target IP address:desired port number

//ex) curl -v telnet://10.10.11.15:9080

//Result
root@vc7 [ ~ ]# curl -v telnet://127.0.0.1:22
* Rebuilt URL to: telnet://127.0.0.1:22/
*   Trying 127.0.0.1...
* TCP_NODELAY set
* Connected to 127.0.0.1 (127.0.0.1) port 22 (#0)
SSH-2.0-OpenSSH_7.8
^C

root@vc7 [ ~ ]# curl -v telnet://127.0.0.1:23
* Rebuilt URL to: telnet://127.0.0.1:23/
*   Trying 127.0.0.1...
* TCP_NODELAY set
* connect to 127.0.0.1 port 23 failed: Connection refused
* Failed to connect to 127.0.0.1 port 23: Connection refused
* Closing connection 0
curl: (7) Failed to connect to 127.0.0.1 port 23: Connection refused

ESXi

https://docs.vmware.com/kr/VMware-vSphere/7.0/com.vmware.vsphere.security.doc/GUID-7A8BEFC8-BF86-49B5-AE2D-E400AAD81BA3.html

esxcli network firewall get
// 방화벽의 사용 여부 상태를 반환하고 기본 작업을 나열함
// | more 또는 | grep 명령어와 함께 사용하는것이 편함