Is my server up to date?

[Thomas]

Hi all!

I have a dedicated server with a pretty large company.
The server is fully managed.

I dont know any thing about server except that it´s connected to the internet and I can put my websites on it....

I rent out some space to customers and they are complaining that the server is slow, badly configurated, not updated and so on.

All I get from my host is that it´s up to date and working fine.

Is there a third-part service that can do a conditiontest of my server that I can show to my host and/or to my customers?

TIA
Thomas