Free round trip to hawaii software for linux

The Wonder Shaper is a very special network shaper script with a lot of features. Works on Linux 2.4 & higher.

Goals

I attempted to create the holy grail:

* Maintain low latency for interfactive traffic at all times.

This means that downloading or uploading files should not disturb SSH or even telnet. These are the most important things, even 200ms latency is sluggish to work over.

* Allow surfing at reasonable speeds while up or downloading

Even though http is bulk traffic, other traffic should not drown it out too much.

* Make sure uploads dont harm downloads, and the other way around

This is a much observed phenomenon where upstream traffic simply destroys download speed. It turns out that all this is possible, at the cost of a tiny bit of bandwidth. The reason that uploads, downloads and ssh hurt eachother is the presence of large queues in many domestic access devices like cable or DSL modems.

Why it doesnt work well by default

ISPs know that they are benchmarked solely on how fast people can download. Besides available bandwidth, download speed is influenced heavily by packet loss, which seriously hampers TCP/IP performance. Large queues can help prevent packetloss, and speed up downloads. So ISPs configure large queues.

These large queues however damage interactivity. A keystroke must first travel the upstream queue, which may be seconds (!) long and go to your remote host. It is then displayed, which leads to a packet coming back, which must then traverse the downstream queue, located at your ISP, before it appears on your screen.

This HOWTO teaches you how to mangle and process the queue in many ways, but sadly, not all queues are accessible to us. The queue over at the ISP is completely off-limits, whereas the upstream queue probably lives inside your cable modem or DSL device. You may or may not be able to configure it. Most probably not.

So, what next? As we cant control either of those queues, they must be eliminated, and moved to your Linux router. Luckily this is possible.

Limit upload speed somewhat

By limiting our upload speed to slightly less than the truly available rate, no queues are built up in our modem. The queue is now moved to Linux.

Limit download speed

This is slightly trickier as we cant really influence how fast the internet ships us data. We can however drop packets that are coming in too fast, which causes TCP/IP to slow down to just the rate we want. Because we dont want to drop traffic unnecessarily, we configure a burst size we allow at higher speed.

Now, once we have done this, we have eliminated the downstream queue totally (except for short bursts), and gain the ability to manage the upstream queue with all the power Linux offers.

Let interactive traffic skip the queue

What remains to be done is to make sure interactive traffic jumps to the front of the upstream queue. To make sure that uploads dont hurt downloads, we also move ACK packets to the front of the queue. This is what normally causes the huge slowdown observed when generating bulk traffic both ways. The ACKnowledgements for downstream traffic must compete with upstream traffic, and get delayed in the process.

We also move other small packets to the front of the queue - this helps operating systems which do not set TOS bits, like everything from Microsoft.

Allow the user to specify low priority traffic (new in 1.1!)

Sometimes you may notice low priority OUTGOING traffic slowing down important traffic. In that case, the following options may help you:

NOPRIOHOSTSRC
Set this to hosts or netmasks in your network that should have low priority

NOPRIOHOSTDST
Set this to hosts or netmasks on the internet that should have low priority

NOPRIOPORTSRC
Set this to source ports that should have low priority. If you have an unimportant webserver on your traffic, set this to 80

NOPRIOPORTDST
Set this to destination ports that should have low priority.

See the start of wshaper and wshaper.htb

Results

If we do all this we get the following measurements using an excellent ADSL connection from xs4all in the Netherlands:

Baseline latency:
round-trip min/avg/max = 14.4/17.1/21.7 ms

Without traffic conditioner, while downloading:
round-trip min/avg/max = 560.9/573.6/586.4 ms

Without traffic conditioner, while uploading:
round-trip min/avg/max = 2041.4/2332.1/2427.6 ms

With conditioner, during 220kbit/s upload:
round-trip min/avg/max = 15.7/51.8/79.9 ms

With conditioner, during 850kbit/s download:
round-trip min/avg/max = 20.4/46.9/74.0 ms

When uploading, downloads proceed at ~80% of the available speed. Uploads at around 90%. Latency then jumps to 850 ms, still figuring out why.

What you can expect from this script depends a lot on your actual uplink speed. When uploading at full speed, there will always be a single packet ahead of your keystroke. That is the lower limit to the latency you can achieve - divide your MTU by your upstream speed to calculate. Typical values will be somewhat higher than that. Lower your MTU for better effects!

A small table:

Uplink speed | Expected latency due to upload
--------------------------------------------------
32 | 234ms
64 | 117ms
128 | 58ms
256 | 29ms

So to calculate your effective latency, take a baseline measurement (ping on an unloaded link), and look up the number in the table, and add it. That is about the best you can expect. This number comes from a calculation that assumes that your upstream keystroke will have at most half a full sized packet ahead of it.

This boils down to:

mtu * 0.5 * 10
-------------- + baseline_latency
kbit

The factor 10 is not quite correct but works well in practice.

Your kernel

If you run a recent distribution, everything should be ok. You need 2.4 with QoS options turned on.

If you compile your own kernel, it must have some options enabled. Most notably, in the Networking Options menu, QoS and/or Fair Queueing, turn at least CBQ, PRIO, SFQ, Ingress, Traffic Policing, QoS support, Rate Estimator, QoS classifier, U32 classifier, fwmark classifier.

In practice, I (and most distributions) just turn on everything.

The scripts

The script comes in two versions, one which works on standard kernels and is implemented using CBQ. The other one uses the excellent HTB qdisc which is not in the default kernel. The CBQ version is more tested than the HTB one!

See wshaper and wshaper.htb.

Tuning

These scripts need to know the real rate of your ISP connection. This is hard to determine upfront as different ISPs use different kinds of bits it appears. People report success using the following technique:

Estimate both your upstream and downstream at half the rate your ISP specifies. Now verify if the script is functioning - check interactivity while uploading and while downloading. This should deliver the latency as calculated above. If not, check if the script executed without errors.

Now slowly increase the upstream & downstream numbers in the script until the latency comes back. This way you can find optimum values for your connection. If you are happy, please report to me so I can make a list of numbers that work well. Please let me know which ISP you use and the name of your subscription, and its reputed specifications, so I can list you here and save others the trouble.

Installation

If you dial in, you can copy the script to /etc/ppp/ip-up.d and it will be run at each connect.

If you want to remove the shaper from an interface, run wshaper stop. To see status information, run wshaper status.

KNOWN PROBLEMS

If you get errors, add an -x to the first line, as follows:

#!/bin/bash -x

And retry. This will show you which line gives an error. Before contacting me, make sure that you are running a recent version of iproute!

Recent versions can be found at your Linux distributor, or if you prefer compiling, here:
ftp://ftp.inr.ac.ru/ip-routing/iproute2-current.tar.gz

Trip Tracker is a position tracking client-server system. Trip Tracker is designed to assist people in setting up a real-time tracking environment with either a private or public tracking server.
The Trip Tracker GPS client sends coordinates to the tracking server to update its position. In the event that the GPS client loses its Internet connection, it can send all collected coordinates to the tracking server as soon as its back online.
The tracking server saves all the coordinates and can forward them to listening map clients.
Version restrictions:
- The map client can only display a map of Norway, as the WMS server is hardcoded in the server-side PHP script "mapservice.php". This may change in the future. If you know any good WMS servers we might add it to the server-side script, but you still need to add the proper WMS layers in the source code to make it work.
- The GPS client version 0.8 does not set up the Java Communications library properly so it most likely wont find your GPS receiver. We hope to address this issue in the next release quite soon.
- And more...

Rockin Rounded Corners is an easy way to add rounded corners to any element on your web site. Upload this script to your site to allow your web site visiters to quickly and easily generate the code needed to add rounded corners, or use it for your own site.
Main features:
- Easy to install. Just unzip and upload, or if youre using it on a local server, just unzip!
- 18 different rounded corner styles to choose from.
- Simple, clean code that is easy to apply site-wide
- Choose from HTML or PHP code for the rounded corners. The PHP code is slimmer, but theres HTML for those without PHP installed.
- An easy way to add a cool new feature to your web site.

Russian Mafia project is a multiplayer IRC game implementation of Russian Mafia.

Russian Mafia is a multiplayer IRC game implementation of the popular game, Russian Mafia, which is based on the Russian card game "MAFIA".

The peaceful civilians attempt to kill all the Mafia and maniacs, while the Mafia and maniacs attempt to kill all the civilians.

After the crush of the Soviet Union, Moscow was plunged into a mafia terror. Russian Goverment asking asking Italian parliament to send them the most talanted detective Commissar Katani, who keep in fear italian mafia Kosa Nostra. Katani arrives in Moscow and with civilians is trying to calm down the crime in the city.

This if fully atomatic game, on the over hande its very interesting and simple multiplayer game. All the game function processed by the IRC mafia bot, which also stores the statistic informations and game points, bank accounts.

The main goal in this game to win. Peaceful civilians have to find and kill all mafia men and maniac, or mafia men and maniac have to kill all civilians, Commissar Katani and other peaceful roles. This mean, peaceful roles have to guess who is bad and kill them - how they can kill them, look down.

Its a round game, with a stages. At the start of each round the mafia bot randomly distribute the roles. The round two stages - day and night, with are repeating until the one of the sides win or until the draw. During the night the roles make the commands, and during the day all players decide whom to kill because of the evidence or guessing, or to process without killing.

To start you have to type !reg during the round registration. After you just follow the mafia bot commands.

After the round registration you will receive a role.

During the night you will be asked about a order to the bot, concerning the role you have.

During the day you have to talk to other players to guess who is criminal, and making votes for the person to kill (codnamn to die).

After the vote the acused person will die. If no winners from civilians or mafia, the game starting again at night stage.

Link Monitor Applet is a GNOME Panel Applet displaying the round-trip time to one or more hosts in a bar graph.
Main features:
- full ICMP and ICMPv6 support
- configurable scale and delays
- HIG 2.0 compliance

]project-open[ software is an open-source based project management system.
Functionality include internet collaboration and e-Rooms, discussion forums, Internet filestorage, customer management (CRM), timesheet management, management accounting with profit & loss per project, basic human resources management (HR), provider & freelance database, search engine, reporting, translation workflow and many more. We are currently working on four different "vertical solutions".
]project-open[ is a very complete online platform and already contains today many of the feature that are currently announced by many large international companies.
We can provide these features thanks to the open-source nature of ]project-open[ that allows us to tap into thousands of manyears of development time from other open-source projects such as OpenACS, AOLServer, PostgreSQL, CygWin, CVS, Postfix, Linux, Pound, Inno Setup, etc.
Additional modules: Data Warehouse, Room Reservation, e-Commerce, Automatic Testing, Content Management, Events, Bug Tracker, Categorysation, Wiki, RSS Support, Blog, WebDAV, Soap & XML-RPC, Calendar, Performance Profiling, CRM Campaigns, Jabber Integration, Filestorage, Glossary Database, News Aggregator, Online Surveys, Webmail.
]project-open[ is useful for project-oriented companies such as IT consultancies, general consultancies, advertizing agencies, etc. It is not very suitable for companies dealing with physical goods, because it doesnt contain the necessary modules (yet). Checkout Compiere or Open for Business as alternatives.
Enhancements:
- More than a dozen new modules and features have been included, including a round-trip integration with GanttProject, resource planning and resource assignments, GUI improvements, a new calendar module to show tasks and deadlines, a new bug tracker module, a new expenses and travel costs module, a new reporting engine, a new Petri-Net workflow engine with a graphical editor, project templates, and a new "configuration wizard" for automatic system configuration.