Hi,
I've got a server with debian oldstable I7-2ksomething and a 100Mbit connection.
I'm thinking about running a bitcoin node on this server to support the network. Is it complicated to install the demon? I've noticed there is only a package in testing. With that connection I could it set to accept more than 8 conections, right? How much traffic should I expect per connection?
Yes, you can support much more than 8 connections. Traffic per connection varies because one peer may be downloading blocks whereas another may only be relaying transactions. in the latter case, it's likely a few mb a day.