Question: I want to know if there is a good, handy and especially open source Monitoring Tool for Linux Server. I only have SSH and HTTPS access to the server (I don't have a GUI or physical Access).

My requirements:

* Web Interface for the "Host" System which also can run on Smartphones
* Detailed list of Services of a specific server
* Event-Log capturing(it would be nice if it could easily filter the errors and warnings
* Monitoring of Network, Hardware and special Software(if its running) + Ports(if they are in use)
* Secured Access
* E-Mail alert over an external E-Mail Server

I use Debian 8 Wheezy.

Answer: 
Oni, Ghost Browser lets you isolate browsing Sessions in each tab. You can also assign a different proxy for each tab with new Ghost Proxy Control extension. No messing VMs or anything. Everything is right there in one browser window. More details here: <https://ghostbrowser.com/blog/set-different-proxy-for-each-tab/>
Somiibo is another software that does this as well. You can assign a unique session to each tab which means independent proxies, logins, cache, cookies, and everything. This [proxy browser](https://somiibo.com/platforms/proxy-browser) is free at the moment.