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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Hosting - actual throughput lower than port speed due to sharing or something else? [on hold]

In the past, when I've transferred very large files between two dedicated servers on 1Gbps ports at two different data centers, I can't actually transfer at 1Gbps unless I use some trick like lftp's ...
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1answer
20 views

How to check the bandwith that is used by each connection on Apache?

I am trying to get stats on how much of a bandwidth each connection uses on Apache? I have Apache 2.4 installed on Windows Server 2008 R2. I would like to know how many users more I can add on my ...
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1answer
16 views

Monitor bandwidth consumption for all connected PC over wifi

We have two internet connection connected to individual wifi router (beetel) in our office, lately i am experiencing very slow internet connection or frequent connection drops, when complained to ISP, ...
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0answers
29 views

Windows Server | Graphs to monitor resorces [closed]

So Linux users have "Dstat" which lets them monitor the network with graphs. Is there any Windows alternative? I am looking for real time graphs to monitor network and cpu/memory (as a bonus) on ...
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2answers
51 views

Individuals able to hit our bandwidth cap… Only a recent phenomenon?

We have a 10Mbps (synchronous) connection with our ISP. Recently we have discovered that if a single user is watching Netflix, or if I run Windows Update on a PC, we will totally saturate that 10Mbps ...
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8 views

Poor memory performance on intel avoton?

I have 12 of these supermicro A1SA2-2750F boards that I'm playing around with in order to compare them to Dell's C5220s but I'm seeing consistent poor memory performance. Just curious if anyone's ...
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1answer
30 views

iptables connlimit: exclude multiple IP addresses

I have currently this IPTABLES command: iptables -A INPUT -s ! 192.168.0.2 -p tcp --syn -m connlimit [...] -j DROP As far as I know, such rule limit some number of connections following various ...
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1answer
8 views

vnstats // stats showing large tx amount

I have installed vnstat 2 days ago; the site got something like 20k+ visits in this time frame. I can read a rx value of 2.16Gb but a tx value of 61.2Gb. Feels like something's going wrong. How ...
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1answer
16 views

Linux Traffic Shaping: ceil rate never reached

My application run on port 8080. I have this iptables command: iptables -A OUTPUT -t mangle -p tcp --sport 8080 -j MARK --set-mark 10 I have also theses TC rules: tc qdisc add dev eth0 root handle ...
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1answer
31 views

How can identify and quantify physical plant (network capacity) in my local area? [closed]

I am interested in identifying physical plant and network capacity in my local area, which happens to be Boston, but could be anywhere. For example, I understand that in Boston there is something ...
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2answers
60 views

How to measure and monitor available network bandwidth without stealing network bandwidth?

Please note that I am not asking for well known usual bandwidth monitoring tools like ntop, iperf, vnstat etc. I would like to measure periodically and reliably the max. available bandwidth of a ...
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2answers
44 views

Is it possible to test throughput without server cooperation?

To measure throughput between two points in a network using iperf, you have to run iperf at one point in server mode. My question is, is there a tool I can use to measure this bandwidth without ...
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45 views

wondershaper doesn't work for redirected traffic

I'm trying to prioritize my network so small packages get through quicker so latency-dependent applications don't get unusable when downloading/watching videos. I want to use one pc(with one nic) ...
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1answer
63 views

rsync using only spare bandwidth?

My scenario: Several rural schools Every school: One linux server Limited bandwidth (shared with all school PCs) Electricity not guaranteed (last to leave the school could cut all electricity) ...
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0answers
80 views

Mac OS X > pfctl > How to limit Bandwidth for a specific port?

I need to limit the Bandwidth of our Apache Server (which runs on port 80 by default). It was easy with ipfw as follows: sudo ipfw pipe 1 config bw 100Kbytes/s sudo ipfw add 1 pipe 1 src-port 80 ...
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2answers
960 views

When reading SSD drive specs, what's the difference between MB/s and IOPS?

I'm trying to find a suitable SSD drive for my database server (postgres on debian 7 amd-64), and I find that for some SSD drives, while read speed is specified in MB/s, write speed is in IOPS. To ...
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4answers
257 views

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 ...
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1answer
74 views

psping to localhost - improve throughput

I'm using following psping command to measure the bandwith throughput for localhost on a physical server psping -4 -b -l 8k -n 20000 localhost:1234 The throughput is around 150MB/s wich isn't all ...
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1answer
18 views

Keep showing old processes in nethogs

Nethogs stops showing idle processes after a while. How can I make it keep showing them? I want to have a complete history of processes for long time. Is there any alternative to nethogs?
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1answer
55 views

AWS per connection download limit

I want to spawn a redis slave in AWS (Sydney), which needs ~20Mbit/s to catch up on the writes of the master located in germany. Problem: I get only 8Mbit/s (1MB/s). Tried bigger instance types ...
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2answers
107 views

Multilayer LACP

I have a network switch that is limited to 2x1Gb/s LACP teaming, however have a file server with a 4x1Gb/s network interface. What options do I have to aggregate all available bandwidth without ...
2
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0answers
59 views

How to monitor the bandwidth per each iptables masqueraded device [closed]

Question: Which tool could I use to monitor and break-down in real-time which bandwidth is routed by iptables to which computers? Context: I have a linux box masquerading about 15 devices to ...
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42 views

Windows Server 2008 consuming a lot of bandwidth

My Windows Server 2008 has been consuming A LOT of bandwidth in the last days (990 GB). This is a development server so it should not consume more than 100mb aprox. We noticed this after the server ...
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1answer
74 views

Apache2 Mod CBAND what happens if the limit is reached?

I setup an Apache2 server with the mod_cband to limit download speed at 512kb/s, and I was wondering what happens if I reach the limit. For example, if my server connection is 100Mb/s, I would ...
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2answers
49 views

How much traffic does a Ubuntu server cause for updates? [closed]

Does anybody have some numbers on how much traffic/month a ubuntu server causes if automatic updates are enabled (just for fetching the apt sources and the packages)? I have a small box which is ...
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15 views

Sonicwall 250m bandwidth

We have an nsa 250m with the SonicOS Enhanced 5.9.0.2-107o version. Is there a way to manage bandwidth by group ? I'm already able to do this this by user with this method Firewalls => Access rules ...
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1answer
52 views

Monitor bandwidth per directory [closed]

I have uploads directory and I would like to count the total downloads of files in that directory, in short, is it possible to monitor the consumed bandwidth per directory?
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76 views

Web server losing bandwidth for 6 hours a day

For the past week or so our CentOS server (that runs Apache and NGIX as a proxy) has been acting odd as its bandwidth output has been consistently dropping from around 10/11pm until 4am to around 1M ...
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3answers
169 views

What network performance is required for thin clients?

I am building a network with approx. 1000 thin clients. I intend to run them over VNC. What type of LAN bandwidth and latency are required? What type of hardware will provide that? If, instead of ...
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1answer
183 views

How Do I Limit Bandwidth For Connections On My Ubuntu VPS?

I have a VPS with Ubuntu 12.04 installed, with a 35Gb limit each month (any more than that used and I have to pay). I normally use it with Zpanel to host a Joomla website, and keep the mail ports ...
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2answers
65 views

Huge Outgoing traffic on windwos azure [closed]

I have a vm on Windows Azure running centos6 as dev node, and have recently experiencing a huge increase in outgoing traffic. VM was stopped and after started by 1 day it shows 236.63 GB on outgoing ...
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36 views

Web Hosting Bandwidth

The company that hosts my web servers mentions a 2mb/s dedicated bandwidth with a burst of up to 5mb/s using the 95th percentile ( Burstable ) billing. To me that sounds slow but I know nothing about ...
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61 views

Reduce Bandwidth on a cisco router (Cisco 877)

PS:Sorry for my english i'm french so i'll try to write the best as I can. I looking since a few weeks now for a command to reduce the bandwidth on a cisco router. I done try a lot off command and ...
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131 views

Monitor traffic on ports with Cacti

This seems like a basic question, but i haven't found any solution yet. Recently I've installed Cacti for interface traffic monitoring. That works fine, but I would like to see these graphs for used ...
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1answer
738 views

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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1answer
292 views

Extremely high bandwidth usage on Amazon EC2 instance

I have a m3.medium instance on Amazon EC2. Things are under development and my usual bandwidth usage is no more than 200 to 300 MB per day. I just noticed a spike in my EC2 bill and found out that I ...
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2answers
454 views

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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0answers
70 views

Accelerating OpenVPN using multiple connections

My ISP throttles single connection downloads, but if I use an accelerator like aria2c and open lets say, 20 connections, my download speed shoots through the roof. I have been able to saturate my ...
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2answers
1k views

Fortigate 100d 802.3ad bonding / Link aggregation

My network is as follows: 1 x Fortigate 100d with the two WAN ports connected to: Ethernet ISP with STATIC IP configured manually (20 Mbps symmetric) via ISP A Ethernet ISP with STATIC IP ...
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178 views

Brute force attack on my servers ports burning through bandwidth

Am having some form of brute force attack being done to my server and I have a screenshot of what's happening below. Remote Address 121.14.154.206 is somehow abusing all of my ports and burning ...
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1answer
46 views

Low Upload Bandwidth Issues

I'm fairly new to the networking world, so please bare with me. On my companies LAN, we are experiencing low upload bandwidth. Download bandwidth is fine. We have a 10 Mbps up and down through our ...
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1answer
99 views

Increase bandwidth per connection on a server

Requirement: I am load testing Rabbit MQ by generating a large number of requests/sec to the server (Server config: 8 core, 16GB). To achieve the above, I am generating load from a client machine at ...
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0answers
305 views

If I enable bandwidth control on my wifi router can I handle more connections reliably?

I have a small router (TP-Link TL-WR841N) bandwidth is 300 Mbps. With default settings it cannot handle more than 10 connections without choking and kicking people out. Theoretically, however, it can ...
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3answers
60 views

How do I assess the capacity of my link for Active Directory needs?

I'm working for a company that has a head office and some remote sites. We have an Active Directory server in the head office and we now want all of the users in the remote sites to join and work on ...
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0answers
56 views

Group traffic shaping with traffic control?

I'm trying to limit the output bandwidth generated by an application with linux tc. This application sends me the source port of the request that I use has a filter to limit each user at a given ...
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1answer
94 views

Is it possible to limit output bandwidth between eth0 and lo?

I'm trying to limit the bandwidth between my eth0 output (nginx proxy) to my loopback inteface (apache) by filtering on destination port. Incoming Packet -> Eth0 -> 0.0.0.0:80 Nginx -> tc ...
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3answers
148 views

Leased Line bandwidth distribution among users [closed]

Say that i purchase a 4 Mb leased line (Radio wave), and also i have around 50-75 users using the connection. What will the speed will each user get ? Will the 4MB be divided among all 75 users or ...
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1answer
100 views

Reduce outgoing bandwidth in ffmpeg

I have a server in Rackspace with some ffmpeg processes listening to audio streaming. Off course when listening to streamings the incoming network traffic is high, and this is ok. But I noticed that ...
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1answer
75 views

Streaming audio/video in a publicly-hosted server increases bandwith usage [closed]

I have a website hosted in a public server (withoud any streaming content) ,using public hosting instead of private because its cheaper. But in public hosting their are limitations when compared to ...
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1answer
597 views

UDP bandwidth calculation based on packet size, request rate and latency [closed]

I need to estimate the bandwidth for a measurement application to be written that uses UDP. I have a good sense of the numbers but am not sure how to put them together. I checked a few throughput ...