I'm making 2 connections to a web server. The first one is not using a proxy and the second one is using a proxy.
In the web server access.log I can see my user agent reported in two different ways.
Not using proxy:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36"
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/FB7395
The modified part is different if I use another proxy. It only happens using http:// sites (on https:// the string is not modified). Also, if I change the ua starting string from Mozilla/5.0 to (i.e.) Mozilla 5.0 (removing the slash) the us is not being modified.
All this make me think the proxy intercepts "Mozilla/5.0" string and modifies the build, but my proxy provider said they do not alter that. But...
Any idea? Thank you!!!