Hi, I've recently bought a dedicated.
I have started setting it up, and I put on also snmp + mrtg.
With them, I have seen that - without any other traffic - the server consumes about 0,5-1,0 KB/s, which results in around 50MB/day.

From tcpdump output, it seems that it is just arp requests from the LAN and port probes from script kidz.
Is that normal, in your opinion and experience, to consume that bandwidth every day for this sort of things?

Thanks in advance.
Best regards :)

Unfortuantly, it is. I've got a couple of servers (both colo and dedi) too, and one of them (one of the colo machines) is doing absolutely nothing for the past 4 months. Still, it consumes 19MB/day while doing nothing at all. All of that traffic is incoming by the way.

50MB/day is a bit more then i have, although i've been pulling as much as 120MB/day with that machine, only from broadcast traffic on the local network.. They've putted me in a private VLAN, and now i'm "only" pulling around 19MB/day of broadcast traffic.

Talk to the company you've bought the server, and see what they can do!

You may want to install a firewall to block certain ports, or do it yourself using IP tables.

but in answer to your question, yes it is very normal.

Yep it's pretty normal to have, some networks are more than others. My servers at DV2 will idle when unused at negligible bandwidth, a few bits a second, my servers at HE will idle at a much higher rate, LOTS more network arping going on, to the tune of 4-5 kbits a second, same type of setup just different locations.