In computer networking and computer science, bandwidth, network bandwidth, data bandwidth, or digital bandwidth is a measure of available or consumed data communication resources expressed in bits/second or multiples of it (kilobits/s, megabits/s etc.).

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Is there a linux terminal command that lets you see the amount of data coming in to your tcp connections in real time?

It would be something similar to top, where you see your cpu processes in real time. I'm not looking for a GUI like Wireshark to do it.
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5answers
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Technologies that allow YouTube scale distribution?

Youtube as we know, is massive. It has thousand of concurrent users streaming at least 2 megabytes per video. Obviously, that gets to be a lot of traffic... far too much for any one server. What ...
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how can I limit per user bandwidth?

To summarise: I have a dedicated server with a few friends running a torrent client with web gui. Each user is running a client under their username on the server so downloads go in their user dir, ...
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2answers
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Bandwidth limits for Amazon EC2

I have a micro instance on Amazon EC2 cloud. Also the instance is small and it has vary low CPU and EAM usage but it generates a lot of content, so it can be considered like a web server serving ...
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2answers
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AWS, Bandwidth and content delivery

My question is about Virtual Machines and delivering their content over the servers connection to the internet. I have an Ec2 windows instance, and its network connection appears to be 100mbps If I ...
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8answers
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Dynamically blocking excessive HTTP bandwidth use?

We were a little surprised to see this on our Cacti graphs for June 4 web traffic: We ran Log Parser on our IIS logs and it turns out this was a perfect storm of Yahoo and Google bots indexing us.. ...
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What is the best way to transfer a single large file over a high-speed, high-latency WAN link?

This looks related to this one, but it's somewhat different. There is this WAN link between two company sites, and we need to transfer a single very large file (Oracle dump, ~160 GB). We've got full ...
21
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8answers
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How can I see how much bandwidth each Apache Virtual Host is using?

I have Apache set up to serve several Virtual Hosts, and I would like to see how much bandwidth each site uses. I can see how much the entire server uses, but I would like more detailed reports. ...
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10answers
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Network Traffic Monitoring

What is the best tool to monitor/analyze network traffic on an entire network (several subnets)? I'm looking for something that will help me toubleshoot bandwidth problems when, for instance, users ...
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How to test real network throughput between two points?

What are some of the better tools/utilities for testing real bandwidth across a link? In my case I am testing the real throughput across a wifi bridge.
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3answers
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Connecting two desktop switches with more than one cable?

I was hoping to find a way to increase bandwidth between two desktop switches I have, and I wondered if connecting them with two cables (or perhaps three) instead of just one might increase ...
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Who's using our bandwidth?

I can see from our ISP stats that a large amount of bandwidth is being used throughout the day, I suspect it's someone using our wireless router although I'm not definite. Our PC's all run various ...
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2answers
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What are the different classes of Internet Connection and how do they differ?

I'm looking for the technical differences between consumer and professional Internet connections. By "professional" I mean: The kind you can get at a datacenter The kind you can get at an office ...
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How to Monitor Bandwidth usage in real terms

I have a small (windows) network with a few people on it. We have internet access via a BT router Generally things are all fine, but occasionally, we seem to experience a dramatic loss of bandwidth....
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8answers
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If I send data to my computer using its public hostname, does it actually go over the internet?

To clarify: I'm using my public hostname to connect to a MySQL database. The hostname resolves to my server's external IP (e.g. 1.2.3.4). Is the data I'm sending/receiving via the MySQL connection ...
12
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9answers
846 views

Opinions on hosting servers in-house

I've read a half-dozen threads here about the pros and cons of hosting in-house, but our situation is a little different than most, so I figured I'd just open a new question. In short, we're a small ...
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2answers
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Counting bandwidth from a Docker container

I'm trying to figure out how to track bandwidth coming from a Docker container. Normally I use --uid-owner as mark to keep track of bandwidth usage for a given user. However, even when I run all the ...
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6answers
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Best way to load balance across multiple static file servers for even an bandwidth distribution?

First off, I'll explain my situation to you. I'm running a fairly popular website as a side project, so I can't really invest a ton of money into it. I currently have just one server with HAProxy in ...
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8answers
907 views

Network explanation: megabytes or megabits?

I'm getting confused with network terms. Can you explain to me how I calculate network bandwidth? When people say 20Gbps does it mean 2.5 G bytes? I really need to understand what it means when a ...
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Rate-limiting incoming traffic

I've never quite understood whether or not it's possible to rate-limit incoming traffic. I realize that there is no direct method whereby to control the remote server's rate of sending packets (unless ...
10
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4answers
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Apache: Limit the Number of Requests/Traffic per IP?

I would like to only allow one IP to use up to, say 1GB, of traffic per day, and if that limit is exceeded, all requests from that IP are then dropped until the next day. However, a more simple ...
10
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3answers
1k views

Monitor Internet bandwidth

We have an IPCop firewall/proxy installed in our network, and although I can use iftop to somewhat take a look at how the clients are using the Internet, is it possible to monitor it from outside the ...
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How to find process which uses most bandwidth

How can I find the process which uses most bandwidth on a Linux PC? With iftop it's possible to find which connections produce most bandwidth, but how to find the process?
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FreeBSD link aggregation no faster than single link

We put a 4 port Intel I340-T4 NIC in a FreeBSD 9.3 server1 and configured it for link aggregation in LACP mode in an attempt to decrease the time it takes to mirror 8 to 16 TiB of data from a master ...
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4answers
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Monitor SSH-traffic per user

We have a backup application that runs once every 12 hours. Multiple servers, desktops, and laptops connect to an EC2-instance and push a backup via SFTP using their own log-in credentials. If they ...
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Limiting network throughput of an already launched process ? (Linux/FreeBSD)

Is there any utility to limit the network throughput of a process after it has been launched? Simple example: you note that a user takes all your upload bandwidth using scp and you'd like to limit the ...
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Amazon EC2 bandwidth charges in case of unwanted incoming traffic(ddos/flood)?

What happens if my EC2 instance gets ddosed/flooded, which could potentially go up to tens of gigabytes an hour(and even more) of undesired incoming traffic, will i be charged for this traffic? My ...
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Slow network speeds - what should I check?

Users are reporting that it's taking a long time to access files on the network, browse intranet sites, etc. What should I check?
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4answers
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Simulate slow connection between two ubuntu server machines

I want to simulate the following scenario: given that I have 4 ubuntu server machines A,B,C and D. I want to reduce the network bandwidth by 20% between machine A and machine C and 10% between A and B....
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What does limit performance of scp?

I've two Debian Linux machine connected via 1 Gbit LAN. I can measure this with a raw HTTP file transfer with wget which gets around 100MB/s in either direction. When I now use scp, the maximum ...
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1answer
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Are network switch data transfer speed limits per port or per device?

When network switches report speeds of say 100 Mbit or 1 Gbit, are they referring to the maximum speed per Ethernet port or is this the physical limit of the switch on all ports? Say for example two ...
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2answers
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Limit incoming and outgoing bandwidth and latency in linux

I realise many similar questions have already been asked, but so far I've yet to find a solution to my problem. I have a virtual linux server (running Debian Squeeze) that I use for testing of ...
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3answers
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When downloading two files, why does the second one not suddenly speed up after the first one finishes? [closed]

I have noticed that when I am downloading several files at a time, and one of them finishes, the bandwidth that it was consuming is not immediately apportioned to the others. For example, if I have ...
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netcat throughput low but iperf high

I was testing the throughput between two pcs, connected on the same router, one with 100mbps lan, the other with 54mbps wifi. Here is the interesting part: using nc, I get 2.63MB/s when sending ...
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4answers
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Limit SSH traffic?

I would like to be able to limit SSH bandwidth on my server. I.e. each sshd process should be limited to 200Kb/s or something like that. scp has this functionality, but ssh, being more designed for ...
7
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3answers
1k views

How should I manage per-user bandwidth?

Users often run bandwidth intensive applications - peer-to-peer applications, video, etc. Do you monitor and/or cap per-user bandwidth?
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Monitoring Bandwidth Usage (Per Internal IP) - Cisco ASA 5505

I manage a small network with a Cisco ASA 5505 and a shared DSL connection. I would like to be able monitor the bandwidth usage of the various users/devices on my network (by IP address). Can I do ...
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3answers
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Limit VMware Virtual Ethernet bandwidth

I'm looking to simulate a 56KB modem connection in a VMware Workstation virtual machine. I remember reading this was possible, but forgot how?
6
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3answers
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Somebody eating all our bandwidth, what should I do?

OK, this is frustrating, my site got thousands of page views/connections in the last 3 days and finally we ran out of monthly bandwidth. We bought more bandwidth and closed the site for maintenance. ...
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2answers
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lxc bandwidth control using tc

I am trying to restrict bandwidth inside my containers. I have tried using the following commands , But I think it is not getting effective. cd /sys/fs/cgroup/net_cls/ echo 0x1001 > A/net_cls....
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6answers
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Remote file copy util (like rsync) but that will take account of data already copied (in this session)?

Let's say I have a directory with 2 files, both are identical and quite large (e.g. 2GB ea.) I want to rsync that directory to a remote host. As I understand it (and I could be wrong), rsync ...
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6answers
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Expected throughput in Gigabit network

I've been doing some tests with iperf to measure the network throughput between 2 servers (connected back-to-back thru a crossover cable) and I only see 180 to 200 Mbps. I tried different cables and ...
6
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5answers
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Alternative to mod_throttle

Is there any alternatives to mod_throttle in apache2 ? Currently this module has been closed http://www.snert.com/Software/apache.htm.
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How much traffic can one machine generate?

Can just one machine on our network generate enough network traffic, whether it be from malware or P2P or whatever, to affect all network/internet users? My company has many public machines available ...
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8answers
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Measure bandwidth usage (GB's transferred) on a linux server

I have a linux email server that I am thinking about moving into "the cloud". After investigating the pricing I see that my major cost is going to be in bandwidth. How would you guys suggest measuring ...
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5answers
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finding the best network latency between two countries

I know there are many tools to test for bandwidth and latency, but they all rely on having at least one host from which you can run those tests. I wonder whether there's an online source or some ...
5
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3answers
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Do multiple network connections between switches increase bandwidth?

Say I have 2 identical unmanaged gigabit switches on a network, A and B. There are computers connected to switch A, there are other computers connected to switch B. A and B are connected via 1 cable....
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8answers
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Best bandwidth tests to use in a pinch?

I see many tools that have been discussed for 'proper' bandwidth monitoring and testing - but I am wondering what people use 'in a pinch'? Particularly on systems that they may not easily have admin ...
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2answers
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raid controller data transfer rate

I'm going to buy an 8-port raid controller for which the declared data trasfer rate is "Up to 6Gb/s per port". The declared connectors are "Two mini-SAS SFF8088". The maximum number of supported ...
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Should Skype be reliable in a corporate environment?

I have been managing the IT function in a small software development company that has grown from 10 users to 70 users in 5 years. Most users in the company are office based, but some key users work ...