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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Should Skype be reliable in a corporate environment?

I've move this from SuperUser after moderator comment. Its not a discussion. I am asking if my theory is valid. I have been managing the IT function in a small software development company that has ...
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13 views

New Relic Alternative? [duplicate]

I'm looking for an alternative to New Relic That I could host by myself in Python or with a Free plan as Sentry. I already use Sentry free plan for bugs trace and it is really a must have for our ...
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1answer
60 views

Where is my bandwidth?

We've got a DSL line rated at 7Mbps. The best speed test results are little over 4Mbps. After replacing our modem, and spending hours on the phone with Verizon, they say that 4Mbps is within ...
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2answers
157 views

How to use iSCSI MPIO to increase bandwidth with XenServer?

I've a FreeNAS Server with four network interfaces. The iSCSI traffic goes through two of those interfaces, and each interface has one IP address in a different subnet. As example: igb0: ...
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1answer
60 views

Best way to optimize site speed for a large traffic website? [closed]

I'm currently managing a Website for a client of mine who gets about about 500-1000 visits minimum a day, and this includes Members uploading videos, photos, blog posts and other content. The site ...
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1answer
37 views

How does HA proxy use bandwidth?

We're using HA proxy for load balancing web servers. How does bandwidth usage work for HA proxy? HA proxy is on a different network than the web servers. Does the bandwidth that ends up being used ...
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0answers
21 views

HTB equal bandwith sharing per ip in one class

In my tc configuration (shown below) in one class all bandwidth is shared among connections equally, but I want to share bandwidth among all IP addresses equally. Now: 192.168.0.2 - 38KB/s ...
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21 views

Windows 2012 R2 RRAS VPN Bandwidth issue (worked fine with 2008 R2)

3 machines : VPN Server (VS) Random Server (RS) My Personnal Computer (PC) PC and VS on different networks VS and RS are on same network VS can connect the internet directly and has a bandwidth of ...
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14 views

View historical data per IP with PRTG packet sniffer

I have recently set up PRTG's packet sniffer sensor for bandwidth monitoring. I am able to pull up historical data in 15 minute increments and see who was the highest user but I would like to see ...
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2answers
31 views

How to automatically send email when process is using more than xxxMbit/s

I haven't found anything for that. How could I automatically send an email (via crontab) with the ID of the process, the user & finally what's the name of the process for example when this process ...
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0answers
28 views

Trace Route, Slow Pings, timeouts on after server restore

I am getting bad ping times on my server, especially for large data requests. The stored procedure on the server runs at 1 second, while calling it through my web applicaiton takes 23+ seconds. This ...
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18 views

When hosting a video chat app, is there automatically any way to go back through and find thorough bandwidth/latency logs?

We're using Adobe Media Server 5.0 and Windows Server 2008 R2. The client is running swfs that connect to an app on the AMS and allow people to talk. Aside from any logging statements we put in ...
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1answer
170 views

fortigate traffic packets not logged

Ciao, we use Fortigate device since years and now we need to check bandwidth usage per protocol and this is is not possible. We made this test: 1) all policy Logging Options - Log all Sessions 2) ...
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1answer
30 views

PPTPD VPN only forward DNS requests?

Is there any possible way of configuring a PPTPD VPN server to only forward DNS requests on so that I can save bandwidth? Thanks, Francis
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1answer
65 views

why does a multicast server endlessly transmitting packets even no client require [closed]

i used to setup a multicast server using windows server 2003 OS, i can see a lot of packets transimitted from the server once it was started. Does it make sense when no one is requiring the multicast ...
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1answer
37 views

Dedicating a server for latency test

I've created a server to test bandwidth from employees working remote (using speedtest.net mini), but was wondering if anyone knew of a way to setup some software in linux to test latency and possibly ...
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1answer
42 views

What size bandwidth pipe do I need? [duplicate]

I am currently hosting in a data center and paying a very large monthly bill. We are moving to a new office and I have been toying with the idea of installing a leased line and self hosting. Public ...
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1answer
74 views

How do I measure the maximum throughput over a timeframe?

I tried to find out the maximum up- and down- DSL throughput I can achieve on my local machine. I tried it with iptraf: On my server with $IP I started: iptraf -s and on my local machine: iperf ...
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1answer
33 views

How do I ensure a REST API does not have a bottleneck when it receives requests? [closed]

I'm creating a REST API that will listen on a public URL and accept uploads of large amounts of data. I understand how to scale software processes using message queues, but what I don't understand is ...
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3answers
90 views

How do I calculate the necessary bandwidth for my office with PCs and VoIP phones?

In our office we have 30 PCs, 2 WiFi and 6 VoIP phones connected to the network that consumes bandwidth. Basically 30 PCs are simultaneously using the Internet (like Facebook, surfing the web and ...
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65 views

Speed limit on streaming/downloading MP4 files

Even though other file formats are downloaded fast, MP4 files are downloaded / streamed at max of 160 kb/s I checked everything that may limit the bandwidth but couldn't find it. How can i make ...
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votes
1answer
90 views

Calculate How Much Bandwidth you Need for a Given Number of Users

If I know how many users will be using a site, and about how many will be on at once, and I can approximate how much data is being transferred between the user and server, how can I calculate the ...
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2answers
57 views

Monitor Exchange bandwidth by user / mailbox

We share an exchange servers between 5 different companies. Our exchange server is consuming a massive amount of bandwidth every month (up to almost a TB!). It's hosted offsite and our hosting ...
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2answers
57 views

MySQL connection errors when client server bandwidth is exhausted

I have several servers with a lot of outgoing traffic using nginx. When the bandwidth is exhausted (1Gbit), I have problems connecting to my mysql server from those servers. The connect always fails ...
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1answer
220 views

Openvpn limit bandwidth

I would like to ask you a question concerning openvpn and the possibility to increase the bandwidth in case I want to transfer files. I have an openvpn server via which I connect to my data center. ...
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2answers
195 views

Mysterious Bandwidth Usage

We use a SonicWall NSA 3500 as our main router. We have a SonicWall Analyzer virtual appliance too that takes information from the NSA 3500 and determines all kinds of stuff, such as bandwidth usage. ...
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38 views

Traffic Shaping Script Not Working

I wrote a script trying to use HTB algorithm to limit the throughput of specific ports, below is the script: tc qdisc add dev eth0 root handle 1: htb tc class add dev eth0 parent 1: classid 1:1 ...
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47 views

nginx and cloudlfare ip confusion?

I am using the below config in http block of my nginx.conf to get real ip while using Cloudflare acceleration service: ## Cloudflare settings to get Real IP's set_real_ip_from ...
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37 views

Balancing server bandwith

I am working on a file uploading website. It will be run on dedicated server with 1GBPS connection. I wanna offer visitors max download speed possible at the current moment. So lets say server can ...
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16 views

Bandwidth usage for the server (all users) in WHM

Is there any way to check the bandwidth usage of my server in WHM? (Preferably with a monthly history).
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23 views

Throttling bandwidth on a per group basis

I am wondering if it is possible to create a bandwidth shaping/throttling script that shapes traffic based on user group. That is, if user1, user2, are in user group group1, they will have 1mb/s ...
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26 views

Cisco bandwidth guarantee based on remote host address

On my cisco I have softphones connecting to some external host. How can I assure to all traffic to/from this external host to have its minimal bandwidth (in case of congestion) of 2Mbit? All other ...
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81 views

big speed difference on a network link with and without VPN tunnel

Scenario: We have a network link between two offices. The link is provided by a third party company through a VLAN on their network, but to us it is totally transparent -as if we had a simple ...
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24 views

Is It Possible to Attach multiple Ports to a TC Filter?

I need to limit the bandwidth/rate by ports, and as a server there would be thousands of ports. Due to the limit of tc filter, I wonder if it is possible for multiple discreate ports to share a same ...
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1answer
38 views

How Many Filters Can We Have — LINUX QOS

I am doing Qos on Linux server using TC. According to the grammar of tc tool, the handle of a filter must be between 800::001 and 800::FFF. And because 0XFFF equals 4095 in decimal, so we can only ...
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29 views

What Is the Smallest Burst Value for HTB Algorithm (QOS)

Regarding the HTB algorithm, I want to know what is the smallest burst value in an HTB shaping rule such as "tc class add dev eth0 parent 1:1 classid 1:10 htb rate 5mbit burst 15k". Is it MTU?
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76 views

Varnish bandwidth accounting per domain - How to do it?

Does anyone know is there way to do bandwidth account per domain on Varnish. Or is there a way to use some other system to monitor how many bandwidth consumed per domain? Thanks
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2answers
131 views

why the dns related traffic is so huge, is my server being hacked?

I have a vps, and have several site on it, usually these sites are rarely being visited except myself, thus i am shocked by one fact that is i visit the vps provider's portal and find i have used a ...
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18 views

Excessive data consumption over ppp0,can't find the culprit

I have an embedded computer that uses GPRS to access the outside world. I have several applications that run on the local network. I also have an application that communicates over the loopback ...
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103 views

How can I isolate the source of outgoing bandwidth usage on VPS server? [closed]

I have a VPS running CentOS Linux 5.x, with Kloxo server management software. I kept everything as close to default as possible. I created NS records with my domain name provider, and successfully ...
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Why Parent Class In a TC Rules Tree Not Working

The parent class in my TC rules script doesn't work as it garanteed! Can somebody tell me what is wrong with my script? Here are some details about my question: From the chapter "9.5.4.4. Sample ...
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2answers
105 views

What Are VMware ESXi/vSphere Fault Tolerance Bandwidth Requirements

I plan on deploying a cluster of 2 ESXi/vSphere servers and having them run in fault tolerance mode. The virtual servers primarily be IIS & SQL. The physical servers will have a single Xeon ...
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3answers
2k views

Fortigate bandwidth monitoring

I have a Fortigate 200B with Forti OS 5.0. How can I watch the total bandwidth being used by my unit both incoming and outgoing? Thanks
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2answers
194 views

Linux Speedtest (or download) capable of 10Gbps

We recently just got some brand new servers from Softlayer out of Dallas 05 that should have 10Gbps connectivity and I'd like to test this claim against a few locations. Does anyone have any good ...
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1answer
90 views

Why This TC Script Not Working

Our application has three classes of traffic, and every type of traffic involves three ports. We want to limit the traffic by port number via TC, so I made a simple TC script to have the test, however ...
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0answers
42 views

Can I use MRTG to show the cumulative bandwidth of all servesr together?

I am currently using MRTG to graph the bandwidth of my servers. It is working well, however I have only the bandwidth chart for each individual server/network interface. I would like to have one ...
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1answer
77 views

What do these two QOS script statements mean

I am studying the QOS utility of Linux -- TC -- recently, and today I encountered below two statments from a bandwidth-limit script on Linux: tc filter add dev eth0 parent 1: prio 1 protocol ip ...
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1answer
147 views

Can TC limit bandwidth by the Qos field of IP header

We are developing a client/server applications. There are three types of network data in our server app: Realtime data such as those of Video/audio, Critical Data such as those of Database data and ...
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1answer
55 views

How to view network activity across entire domain?

Wondering if Windows Server 2008 R2 Std has any features that allow you to view network information like number of connections, current rate, total bytes, etc, for all computers on the domain? ...
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2answers
176 views

Excessive ARP request with no reply

I had been monitoring our LAN setting due to slow bandwidth. In the wireshark, I am seeing an ARP request that is never resolve to a MAC address from the same IP address. I did a NMAP scan, the ...