TLS in Ingress setup timeout - kubernetes

Question

I deployed a basic service in my kubernetes cluster. I handle routing using this Ingress:
---
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: owncloud
spec:
rules:
- host: example.com
http:
paths:
- backend:
serviceName: owncloud
servicePort: 80
I generated a kubernetes secret in default namespace using a generated key and certificate. I named it example-tls and add it to the Ingress config under spec:
tls:
- secretName: example-tls
hosts:
- example.com
When I GET the service using https (curl -k https://example.com), it times out:
curl: (7) Failed to connect to example.com port 443: Connection timed out
It works using http.
What's possibly wrong here?
Here is the describe output of the concerned ingress:
Name: owncloud
Namespace: default
Address:
Default backend: default-http-backend:80 (<none>)
Rules:
Host Path Backends
---- ---- --------
example.com
owncloud:80 (10.40.0.4:80)
Annotations:
kubectl.kubernetes.io/last-applied-configuration: {"apiVersion":"extensions/v1beta1","kind":"Ingress","metadata":{"annotations":{},"name":"owncloud","namespace":"default"},"spec":{"rules":[{"host":"example.com","http":{"paths":[{"backend":{"serviceName":"owncloud","servicePort":80}}]}}]}}
Events: <none>
My Ingress Controller service:
$ kubectl describe service traefik-ingress-service -n kube-system
Name: traefik-ingress-service
Namespace: kube-system
Labels: <none>
Annotations: kubectl.kubernetes.io/last-applied-configuration:
{"apiVersion":"v1","kind":"Service","metadata":{"annotations":{},"name":"traefik-ingress-service","namespace":"kube-system"},"spec":{"port...
Selector: k8s-app=traefik-ingress-lb
Type: NodePort
IP: 10.100.230.143
Port: web 80/TCP
TargetPort: 80/TCP
NodePort: web 32001/TCP
Endpoints: 10.46.0.1:80
Port: admin 8080/TCP
TargetPort: 8080/TCP
NodePort: admin 30480/TCP
Endpoints: 10.46.0.1:8080
Session Affinity: None
External Traffic Policy: Cluster
Events: <none>