Operating system Ubuntu Linux 20.04.6 Webmin version 2.202 Usermin version 2.102 Virtualmin version 7.30.3 Authentic theme version 21.20.7
Exactly where does Webmin grab data for it’s main page network i/0 graph? I’ve been seeing a very repeated spike over and over all day and night long showing in this graph but no other network monitoring tool has been able to show the same thing nor has the providers snmp on the connected network equipment. I’ve used just about every linux network tool and nothing else seems to match what this graph is showing making me think something is wrong with webmin or it’s access of the network data. These are repeated roughly 5mb spikes in and outbound in a very set pattern.
This continues to be a puzzling problem. I have not found a single linux tool that is matching what the I/O graph is showing. Nethogs seems to be the easiest and I see no spikes like the graph is showing, bandwidth usage logs are not… not even the datacenters monitoring does.
This really looks like some kind of issue with virtualmin/webmin because network wise I find nothing that indicates what the grahps are reporting is actually happening.
Much calmer and mine should look like yours does. Only things on it are a streaming server, low usage mail server and a few websites none that get heavy traffic. I should see somewhere between about 3-8 meg out steady and while it shows these spikes non stop I can find no network tool that confirms the same. Using nethogs I see the icecast server at the top non stop so nothing is using more than it is - certainly nothing showing in and outbound spikes as high as 10 meg. Far as I can tell the graph is broken somehow.
So its broken because your the only one getting unusual activity?
If it was broken we would all see it. Virtualmin just pull the info from /proc/net/dev on your system.
Network devices facing the internet on servers are never silent, with constant background noise like broadcasts, ARP requests, unsolicited traffic like scans and pings, and etc. That said, this graph appears quite normal to me!
Yes. the key bit of info is the Y axis only 0.5 Mb not 5Mb spikes in the OP (though I would expect background noise to be pretty constant - more like a hum)
(though I would expect background noise to be pretty constant - more like a hum)