Normally the first thing you would think is that you should use the host network in Docker but this loses the isolation, in that case I'd rather use LXC and a public IP or a full VM with public IP to avoid these issues.
Before you Start
I assume you have also ruled out any firewall issues on either end, that RTP or SIP signaling is not being blocked by either side.
1.) Key Settings in Docker/Ports
Before starting, I assume you have forwarded........
pip install obfsproxy
/usr/lib/python2.6/site-packages/pip/_vendor/requests/packages/urllib3/util/ssl_.py:90: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. For more information, see https://urllib3.readthedocs.org/en/latest/security.html#insecureplatformwarning.
InsecurePlatformWarning
You are using pip version 7.1.0, however version 8.1.1 i........