Tanto quanto sei, é normal o tráfego HTTP / HTTPS para os seguintes URLs necessários:
https://ssl.google-analytics.com/__utm.gif
http://www.google-analytics.com/__utm.gif
e
http://www.google-analytics.com/ga.js
Portanto, a porta 80 para HTTP, a porta 443 para HTTPS e o (s) site (s):
ssl.google-analytics.com
www.google-analytics.com