need an easy to use bandwidth limiter / slow Internet simulator to test my websites. I would prefer a per application setting where I can limit, say only the web-brower etc.A GUI would be nice as wel
View 2 RepliesI'm doing some simulations (using Iperf) to obtain throughputs values of a link between two gigabit ethernet cards for different delays and different drop probability (using netem) .... Now I have to do a 3minute long simulation in which during the firstnute the bandwidth is 1000Mbit/s, 500Mbit/s during the second minute and 1000Mbit/s during ththird one....Does anybody know how can i do this type simulation
View 4 Replies View RelatedI am looking for a very particular sound wave simulation program. To get an understanding of what i want let me describe it to you in a different way.
Imagine your look at a bowl of water from above and you poke the water at a specific frequency you will see wave patterns showing. Well im after a program that can generate that pattern with any particular frequency that i set, and to allow me to place different shapes and objects around the sound source or sources (i may want to use more than one sound source that may or may not be at the same frequency as first.) and see what kind of reflections i get.
I was also wondering if instead of a point sound source you could have an entire shape giving off a specific vibration. This will give very interesting results that i am also after.
There are some programs that show sound simulations that i have described but nothing that can do the requirements that i desire. Do any of you guys know of any programs that can do this? if not how much would it cost to build such a program?
I have a fast server running Debian 5 (I tried to upgrade and everything broke.
So I'll stay with Lenny):
Core 2 Duo
4Gb RAM
RAID 0
100mbit
When I use the -X command and try and run applications to my desktop, it is VERY slow. Firefox takes 20 seconds+ just for a right-click menu to appear. It is completely unusable because of this speed. And this is after a clean install of Debian 5.
I've tried on multiple clients (Windows and OS X) and it is always slow! Even though both computers and connections are fast. My home connection is 100mbit too....
So the problem is not bandwidth or resources, the problem must be with the server/software? Any ideas why tunneling X11 applications are so slow? Is there an alternative X11 software I could use on the server?
1 thread in FTP to this server gives 10MB/s (100mbit). So X11 should be fast? And btw, I'm tunneling through SSH.
Can figure out why it is so slow?
Is it possible to share bandwidth over Internet? A friend of me has made a little radio station with win-amp to screw around with. But as you can guess after 10 users the connection flips due to bandwidth limits. So we where wondering if we somehow can share both our bandwidth. I was thinking about perhaps linking some proxy's and combine that with load balancing... Something like that! But i'm not even sure if it's possible to do so.
View 3 Replies View RelatedI'm looking for a simple way to monitor and log my internet bandwidth usage. Not total network device usage, just internet usage.Something that provides a simple chart of daily, monthly, and yearly usage, but ignoring all bandwidth on my internal LAN.I notice several possible tools, such as vnstat, ntop, iftop. Yet all of them seem focused on tracking the entire network interface. I want to ignore LAN usage. I do not really care about LAN bandwidth.iftop seems intended only for on-the-fly usage and not cumulative logging. I can't tell whether vnstat or ntop can be configured to log only internet usage rather than all traffic through the network device.
I do not want to log every connection like squid. The utility should only log stats on a daily basis, but also be able to display cumulative totals from those daily entries.I don't need DNS resolution, port monitoring, etc.I prefer something that runs in the background as a service or daemon, but can provide statistics quickly with a terminal window. All I want is to view total daily, monthly, and yearly internet usage. Perhaps even pipe the output to a local email each day too.
I have an Ubuntu box, and there are two another PCs with Windows XP at my home.There is a TP-Link WR340GD wireless broadband router, and a Motorola SB5101E cable modem. Maximum download speed of the Internet connection is about 6 Mbit/sec.While I'm starting some download processes on the Ubuntu box, the other two PCs get only small bandwidth according to their users, although download speed on my computer does not often exceed its maximum.
More precisely: I usually download files at approx. 1 Mbit. The other users complain about that I slow down the Internet connection at their computers, and tell me to stop using the Internet.Is it possible to improve the usage of internet bandwidth, and share the connection fairly between computers
very slow internet connection with a download speed of only five kbps and my problem is i have many softwares installed which startup during my boot and i can see network activity in the system monitor that some software is using my internet speed and all other important downloads run slow...Can anybody tell me some softwares which tell me which software is using my internet bandwidth, I tried iftop and it shows only the connection between client and server with ip address ...I need softwares which tell the software using the internet bandwidth
View 2 Replies View RelatedMy linux box has 3 network adapter. eth0 connects with ISP, eth1 is for staff network, eth2 is for public user. I want to limit the usage of internet bandwidth. for example, the traffic going through eth0, 75% is for staff network, 25% is for public user.In addition, I setup shorewall on it for port forwarding and filtering, but I felt the traffic shaping of shorewall is complex. I don't need the specific TOS, but only the percentage. could you give me some suggestion?Which software or package I should use to achieve this goal?
View 3 Replies View RelatedIn one of our network we are using one firewall which works as gateway. All machines are able to access internet through this gateway. There is no filtering and any internet restriction. I would like to setup monitoring system which monitor and log bandwidth and sites access by client machine. Is there any tool which monitor internet access as well as sites which are access from client machines.
View 12 Replies View RelatedI have configured a normal squid & now I want to manage internet bandwidth thru. "squid" proxy only.
Squid proxy server ip is :- 192.168.17.30
Client PC ip addres is 192.168.17.25
Total bandwidth avaialable :- 2 Mbps
Now, I want to limit bandwith of 400 kbps for the ip address 192.168.17.25 pc only. So, is there any method available for bandwidth limiting for a single pc?
I created a the class like this for shaping the packets with a specified bandwidth rate.....
tc qdisc del dev eth0 root
tc qdisc add dev eth0 root handle 1: htb default 15
tc class add dev eth0 parent 1:0 classid 1:1 htb rate 750kbit ceil 750kbit
tc class add dev eth0 parent 1:1 classid 1:3 htb rate 600kbit ceil 750kbit prio 0
For Our Requirement:-
I dont want to specify the bandwidth rate strictly like this rate750kbit ceil 750kbit,based on whatever speed is coming which should allocate the bandwidth rate for particular class...I need one application for finding the upcoming bandwidth & Is any other method is there for specify the bandwidth rate in a classes.
We have a sipmle office network set up that we also use use to connect to the internet, however of late the number of users has increased thus slowing internet access. Bandwidth upgrade is not an option thus i have to do bandwidth shaping on our linux router. The question is how do set the squid configs to allow certain IP's range a certain percentage bandwidtheg 60% and furthe divide the rest. Alternatively how can allow certain IPs to have higher bandwidth access.
View 1 Replies View RelatedI have successfully changed and configured TORA in ns-2.34 (in fedora 9), as learnt from;[URL]..Now, when I run the simulation, it hangs and does not finish. If the simulation time is 20 seconds, it do completes but for simulation times more than 20 seconds, it never comes to an end.
Code:
num_nodes is set 50
INITIALIZE THE LIST xListHead
Loading scenario file...
Loading connection pattern file...
channel.cc:sendUp - Calc highestAntennaZ_ and distCST_
highestAntennaZ_ = 1.5, distCST_ = 550.0
SORTING LISTS ...DONE!
I have tried increasing the bandwidth and interface queue lengths but got no improvement.Please note that the same TCL scripts are running with other protocols like DSDV, AODV etc
I got ubuntu 10.10 64 bit and I really do like it. My only problem is that the internet is very slow. It takes ages to load a page. i got Ubuntu as my second system on my computer and the internet works fine on my windows 7 partition. I already disabled the ipv6 and my DNS. I dont think the problem comes from firefox either.
View 9 Replies View Relatedmaking My simulation graphs in Ns-2.34 in ubuntu how i can make them. my simualtion is about Home automation lighting control and i wnated to make 6 graphs1) time VS Residaul energy ( remaining enregy of the nodes)like sensors (we have mentioned Insteon sensor and Switchlinc Dimmer)use 9V battery in them. the 9V should be converted in joules and Energy on Y-axis should be in Joules and time on X-axis should be of simulation timeThe graph would be showing after running the simulation 3000 times how much energy is remaining or how much energy is consumed in the nodes after sending 2000 packets.2) Packet size Vs Delay, Delay on Y-axis and Packet size on X-axis with there units and the graph would be showing if Pacjet size increases how much delay is created.3) Throughput Vs Badwidth. througput on Y-axis and Bandwidth on X-axis4) Packets Loss Vs data rate5) Packets sent Vs data rate6) Packets received Vs data rate
View 8 Replies View Relatedim doing my final year project on wireless network simulation using ns2.. how to simulate protocols in ns2.
View 1 Replies View RelatedI am currently using Cent OS 5.4 and I was able to successfully install ns 2.34 on the machine and run a few test FTP simulations. The problem stems from the fact that the ns 2 installation used in the ATM simulation , in the link provided, uses ns2.1b7 or ns2.1b9.
I have tried to see if I could cheat and implement the patch for my ns2.34 installation but that failed flat out ( make failed with an incorrect parameter error) I then tried to download the older versions of ns that were used in the ATM Simulation, ns 2.1b9 and that failed too ( otcl make failed with g++ error) which i figured failed because I am using g++ version 4.1 . ( From the docuemntation, this particular version of the software had trouble with any g++ version > 3.2)
a) Is anyone aware of any ATM Simulation patch for the current version of ns i.e. ns 2.34?
b) Is there anyway I can confgure the patch for the ns2.1b9/7 version to work smoothly with the ns2.34 version I have installed?
c) What are the recommendations for me to install the ATM Simulation provided on the URL above.
I'm using Fedora 13 x86_64. The internet speed is very very slow. I have enough hard disk space, RAM. Processor AMD Athlon II 2.6GHz. What can be the reasons?
View 7 Replies View RelatedI have dual boot OS and I'm using Ubuntu with Win 7. Previously I was using Fedora but I thought to change the flavor! So I installed Ubuntu, but now I'm truly facing problem with my Internet connection! Its too slow in Ubuntu, the both surfing and downloading speed! Usually in windows I get 200-400 kbps download speed when downloading a file and if I download the same file in Ubuntu using flashget I'm getting only 60-70 kbps speed! Also the surfing is too slow! My broadband's bandwidth is 2.1 Mbps!
View 2 Replies View RelatedI have been using 10.04 since quite a long time now. and everything was working smooth until last update and all of a sudden my firefox and chrome are slow, really slow on internet. At first I could not believe that ubuntu could be so slow so I called my ISP provider and fight with them. later on I found that my XP runs fast, and Finally the problem is on my ubuntu system. I looked online and disabled my ipv6 but still the issue is not solved. I even tried openDNS and that did not help. What's going on on recent update?
View 3 Replies View RelatedI just installed Ubuntu 11 on my Acer timelineX 5820T, core i3, 2.4ghz, 4gb ram, 250gb hard drive laptop.
I installed it side by side with Windows 7.
After the install Ubuntu works really, really slow on the internet. Internet speeds of like only a few kb per second. It took about 10 minutes to download a 21.2MB file whereas on Win7 I'd be done in a minute or two. Also seems to run much slower as well...
So I just installed ubuntu on my pc. I love it, with one exception. The internet is unbearably slow. I had windows on there before, and never ran into an issue, so I assumed, when it auto connected to my ethernet, that everything was a-okay. Apparently not so much. Download speeds and browsing speeds are both affected
View 9 Replies View RelatedI use Slackware 12.1 and I have a big problem that I can't solve by myself. I'm connecting to a LAN where there are almost 20 PC connected, all with static IP.
my ip: 192.168.1.205
netmask: 255.255.255.0
gateway: 192.168.1.1
DNS server: 80.58.61.250, 80.58.61.254
I configured manually it but it doesn't works well. I set up the DHCP server on Windows 2003 so I tried to configure it with dhcp too. It gives addresses from 192.168.1.200 to 192.168.1.240 there are no PCs connected with DHCP at the moment, so my IP is only mine.
My problem is the following:
bash-3.1# ifconfig
eth0 Link encap:Ethernet HWaddr 00:1e:68:3d:1b:ad
inet addr:192.168.1.201 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::21e:68ff:fe3d:1bad/64 Scope:Link
Up Broadcast Running Multicast MTU:1500 Metric:1
RX packets:77 errors:0 dropped:0 overruns:0 frame:0
TX packets:44 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:7041 (6.8 KiB) TX bytes:6282 (6.1 KiB)
Interrupt:17 Base address:0xc000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:1810 errors:0 dropped:0 overruns:0 frame:0
TX packets:1810 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:90500 (88.3 KiB) TX bytes:90500 (88.3 KiB)
bash-3.1# route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
localnet * 255.255.255.0 U 0 0 0 eth0
loopback * 255.0.0.0 U 0 0 0 lo
default 192.168.1.1 0.0.0.0 UG 1 0 0 eth0
bash-3.1# ping www.google.es
PING www.l.google.com (66.102.9.99) 56(84) bytes of data.
64 bytes from 66.102.9.99: icmp_seq=1 ttl=243 time=78.7 ms
64 bytes from 66.102.9.99: icmp_seq=2 ttl=243 time=84.2 ms
64 bytes from 66.102.9.99: icmp_seq=3 ttl=243 time=75.1 ms
64 bytes from 66.102.9.99: icmp_seq=4 ttl=243 time=82.1 ms
64 bytes from 66.102.9.99: icmp_seq=5 ttl=243 time=82.8 ms
64 bytes from 66.102.9.99: icmp_seq=6 ttl=243 time=79.4 ms
64 bytes from 66.102.9.99: icmp_seq=7 ttl=243 time=82.3 ms
64 bytes from 66.102.9.99: icmp_seq=8 ttl=243 time=75.2 ms
64 bytes from 66.102.9.99: icmp_seq=9 ttl=243 time=80.7 ms
64 bytes from 66.102.9.99: icmp_seq=10 ttl=243 time=84.7 ms
64 bytes from 66.102.9.99: icmp_seq=11 ttl=243 time=75.0 ms
64 bytes from 66.102.9.99: icmp_seq=12 ttl=243 time=82.2 ms
64 bytes from 66.102.9.99: icmp_seq=13 ttl=243 time=85.1 ms
64 bytes from 66.102.9.99: icmp_seq=14 ttl=243 time=80.9 ms
64 bytes from 66.102.9.99: icmp_seq=15 ttl=243 time=87.7 ms
64 bytes from 66.102.9.99: icmp_seq=16 ttl=243 time=87.6 ms
64 bytes from 66.102.9.99: icmp_seq=17 ttl=243 time=83.2 ms
(...)
- www.l.google.com ping statistics -
49 packets transmitted, 48 received, 2% packet loss, time 560804ms
rtt min/avg/max/mdev = 73.624/80.945/87.725/3.823 ms
It takes a lot of time connecting to a internet web site! It's really strange because downloading a file the transferring rate is good, it takes some time starting, but it works normally. I wait almost 7 seconds after seeing a web site. All the others PC's (windows xp) can connect perfectly to network using static and DHCP. Trying with another wire in another room I've got the same result. My /etc/resolve.conf is configured with the IPs specified upper in this page.
I set up my linux router as a simple NAT router. I use CentOS 5.4. When I set up ISP proxy IP in the browser of client PC, Internet access is fast. When I remove ISP proxy IP from the browser, Internet access is slow.
ISP use transparent caching but I can use manual caching as well. Clients on my network with transparent caching get slow internet access and using ISP proxy get fast internet access.
ISP announce that we can use transparent caching or manual caching.
So, I set up my linux router with squid. I set up cache_peer TAG point to ISP's proxy IP. But the problem is the same. Using my squid proxy is slow and using ISP proxy directly is fast. All other network settings are correct.
How can I improve my internet connection using transparent caching. I don't want to set up proxy IP address on all clients.
I am using firefox in my fedora o.s and its very very slow when compared to my IE of windows. sometimes i get an error saying "server not found",it mainly takes a lot of time in in the first stage of connecting the site, that is looking up www.google.com(bottom left corner of your browser)
View 12 Replies View RelatedSurface simulation on screen with fingersWhat will be the solution of the captioned topic on Open Source?
View 4 Replies View RelatedWhat is most famous Electric circuit simulation Program in linux?? except egda or xcircuit. I want a good program like proteus in windows.
View 1 Replies View RelatedI've been doing Finite Element simulations with the Ansys software for several years now, and recently I have been allowed to use a cluster running on Linux (it's a Sun Grid Engine, or SGE). Since I am quite newbie to this thing, I have read a lot on the internet to get more familiar with the Unix language. I found some example codes which are supposed to launch Ansys and read input files, but it does not work for me. Actually, what I want to do is simple:
1- I need to use Ansys 12.1 in batch mode, with the Academic Research license (which is called "aa_r");
2- The software should then read my input file (which is an APDL command file (in case you are familiar with it..)) and save the database and results in my working directory on the server.
The software is located in the following path:
/ansys_inc/v121/ansys/bin/ansys121
My working directory:
/home/myusername/
From what I've found on the web, I have to write a shell script that calls the software and specifies the details (batch mode, license name, input file, ...). Then I have to call this script by using the command "qsub".
Script: myjob.sh
Code:
#!/bin/bash
nohup /ansys_inc/v121/ansys/bin/ansys121 -b nolist -p aa_r -j jobname -i jobname.inp -o jobname.out 2>&1 &
Cognitive Radio patch worked with ns-2.31 but when I tried it for ns-2.34 it did not work. Is there a separate patch available for ns-2.34 to support cognitive radio ? Or does it not work with ns-2.34 at all ?
View 2 Replies View Related