I have seen a consistent spike in traffic over my network since Monday morning and I don't know where it's coming from!
I don't have netflow routers (like I would like), I have IPCop firewalls.
Is there any way that's built in to Linux that I can see where the packets are coming from/to? Like a built in packet capture?
If there's not, how do I go about finding where this traffic's coming from?