Kubernetes: curl works on physical node but NOT in pod

I installed kubernetes (1 controller node and 4 worker nodes).

O.S. Ubuntu 22.04.1 kubernetes v1.26.1 Calico v3.25.0

From a POD I need to get authenticate to an external server.

The request works perfectly when running on the node itself (NOT inside POD), but it doesn't inside a kubernetes POD.

I installed network-tools, this is the yaml file

`apiVersion: apps/v1 kind: Deployment metadata: name: network-tools namespace: tools labels: app: network-tools spec: replicas: 1 selector: matchLabels: app: network-tools template: metadata: labels: app: network-tools spec: containers: - name: network-tools image: praqma/network-multitool

I tried this command: curl -k 'https://xxxxxxxxxxx/RequestSessionToken' -H 'Content-Type: application/json' -d '{"Username": "username", "Password": "password", "TokenLifetime": 3600}'

Response inside NODE (GOOD!): {"Token":"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx","UserStatusCode":0}

Response inside POD network-tools (BAD!): curl: (35) error:1408F10B:SSL routines:ssl3_get_record:wrong version number

Adding -vvv at the end (inside POD): `* Trying xx.xx.xx.xx:443...

• Connected to domainname (xx.xx.xx.xx) port 443 (#0)
• ALPN, offering h2
• ALPN, offering http/1.1
• successfully set certificate verify locations:
• CAfile: /etc/ssl/certs/ca-certificates.crt
• CApath: none
• TLSv1.3 (OUT), TLS handshake, Client hello (1):
• error:1408F10B:SSL routines:ssl3_get_record:wrong version number
• Closing connection 0 curl: (35) error:1408F10B:SSL routines:ssl3_get_record:wrong version number`

I tried adding several flags like tls-max tls-version insecure etc etc without success.

Thanks in advance for your help