TLS - handshake timeout

Question

I got a problem with Ubuntu Server 16.04 on dual stack (IPv4/v6).

When I request IPv4 only servers, like Paypal or DockerHub, I got TLS handshake timeout:

$ curl -vvv https://paypal.com                                                                                                                                                  130
* Rebuilt URL
*   Trying 64.4.250.33...
* Connected to paypal.com (64.4.250.33) port 443 (#0)
* found 173 certificates in /etc/ssl/certs/ca-certificates.crt
* found 692 certificates in /etc/ssl/certs
* ALPN, offering http/1.1


* Operation timed out after 0 milliseconds with 0 out of 0 bytes received
* Closing connection 0
curl: (28) Operation timed out after 0 milliseconds with 0 out of 0 bytes received

$docker pull nginx                                                                                                                                                              
Using default tag: latest
Error response from daemon: Get registry-1.docker/v2/: net/http: TLS handshake timeout

My IPv4 connectivity work at glances, but I don't understand why I got these TLS issues.

Any Idea to help me ?

Answer 1

This message is coming due to default firewall service apparmor on ubuntu is preventing to pull nginx . Either allow from apparmor or stop apparmor first .