ECONNRESET error with fresh installation of ionic in ubuntu 14.04

My node version - v4.2.1
My npm version - 2.14.7

Doing $: which node
reflects -> /usr/local/bin/node

I tried npm config set registry as previously it was set to http, so I tried both but still the ECONNRESET error continues

Let me know what else I try ?.

FYI - My internet speed is fair enough to download packages, as previously I installed ionic with no issues v1.3.x

I also tried cleaning cache but no luck.