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Archive of posts published in the category: internet

Children Internet Safety

          Nearly all American children now have access to the Internet. Internet technology affords children access to vast amounts of valuable information and endless sources of entertainment. However, it also exposes children to certain dangers. For example, children may come into contact with demeaning, racist, sexist, violent, hateful or false information. They may also view pornographic web sites, SPAM (unsolicited emails) containing obscene material, file swapping programs with inappropriate and sometimes mislabeled content, and other types of material potentially inappropriate for a child. Most worrisome, children may encounter actual predators that use the Internet to identify and lure victims through chat rooms, instant messaging facilities, and social networking sites.

          As a result, some parents may understandably feel the urge to eliminate these risks by prohibiting their children from using the Internet. However, this decision would deprive them of access to an amazing resource for legitimate information and communication. Furthermore, parents might find it impractical to enforce such strict prohibition. For example, many schools require students to take Internet training classes, or use online databases in the classroom. In addition, motivated children and teens could circumvent their parents’ prohibition by getting online in public establishments with Internet access or by using mobile or wireless devices. For these reasons, it is important for parents to strike a balance between the benefits and risks that the Internet poses to children. Parents can achieve such a balance by implementing strategies and protective steps like those discussed below.

Communicating Internet Risks to your Children:

          Parents and guardians have a large role in accessing potential risks on the Internet, and communicating those risks to their children. Due to first amendment rights to free speech, various types of information can be posted in the web, some of which a parent may find inappropriate for their child(ren) to view. Therefore, communicating with children about any risks that they can encounter online is the most important and most effective strategy to keep children safe while they surf the web. It is hard for a child to try to avoid potentially inappropriate material if they do not know what to avoid.

          To communicate these risks most effectively, a parent must understand the risks. This may sound trivial, but uses for the Internet are growing and changing as web technologies advance. For example, social networking or online gaming present specific and potential risks that may be unfamiliar to a parent that does not use the Internet for these purposes. Therefore, it is important for parents to stay abreast of current technologies in order to best communicate all potential risks to their children. (For further information on the benefits and risks associated with different Internet uses and applications, see National Center for Missing & Exploited Children’s Keeping Kids Safer on the Internet: Tips for Parents and Guardians)

          Parents may also wish to establish an open dialogue with their children. Open dialogue allows children to feel comfortable to tell a trusted adult if they come across material that makes them feel scared, uncomfortable,


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SEO and Internet Marketing Company

Confused by digital marketing strategy options? Our SEO and internet marketing company works with you to achieve your goals and improve upon what you are already doing to promote your business.

We are business people first, having been small business owners and worldwide corporate team managers ourselves. We help you turn your business knowledge into a map for identifying what marketing tactics will work best and which fit your budget.

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See more marketing consulting, website design, and SEO testimonials like the video at right.

Check out our SEO and internet marketing company blog posts below…let us know what you want to learn about!

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Page 1 SEO Design – Madison WI Internet Search Engine Marketing Firm

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Internet sharing – ArchWiki

This article explains how to share the internet connection from one machine to other(s).


The machine acting as server should have an additional network device. That network device requires a functional data link layer to the machine(s) that are going to receive internet access:

  • To be able to share internet to several machines a switch can provide the data link.
  • A wireless device can share access to several machines as well, see Software access point first for this case.
  • If you are sharing to only one machine, a crossover cable is sufficient. In case one of the two computers’ ethernet cards has MDI-X capability, a crossover cable is not necessary and a regular ethernet cable can be used. Executing ethtool interface | grep MDI as root helps to figure it.


This section assumes that the network device connected to the client computer(s) is named net0 and the network device connected to the internet as internet0.

All configuration is done on the server computer, except for the final step of #Assigning IP addresses to the client PC(s).

Static IP address

On the server computer, assign a static IPv4 address to the interface connected to the other machines. The first 3 bytes of this address cannot be exactly the same as those of another interface, unless both interfaces have netmasks strictly greater than /24.

# ip link set up dev net0
# ip addr add dev net0 # arbitrary address

To have your static IP assigned at boot, you can use a network manager.

Enable packet forwarding

Check the current packet forwarding settings:

# sysctl -a | grep forward

You will note that options exist for controlling forwarding per default, per interface, as well as separate options for IPv4/IPv6 per interface.

Enter this command to temporarily enable packet forwarding at runtime:

# sysctl net.ipv4.ip_forward=1

Tip: To enable packet forwarding selectively for a specific interface, use sysctl net.ipv4.conf.interface_name.forwarding=1 instead.

Warning: If the system uses systemd-networkd to control the network interfaces, a per-interface setting for IPv4 is not possible, i.e. systemd logic propagates any configured forwarding into a global (for all interfaces) setting for IPv4. The advised work-around is to use a firewall to forbid forwarding again on selective interfaces. See the systemd.network(5) manual page for more information. The IPForward=kernel semantics introduced in a previous systemd release 220/221 to honor kernel settings does not apply anymore.[1] [2]

Edit /etc/sysctl.d/30-ipforward.conf to make the previous change persistent after a reboot for all interfaces:


Afterwards it is advisable to double-check forwarding is enabled as required after a reboot.

Enable NAT

With iptables

Install the iptables package. Use iptables to enable NAT:

# iptables -t nat -A POSTROUTING -o internet0 -j MASQUERADE
# iptables -A FORWARD -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
# iptables -A FORWARD -i net0 -o internet0 -j ACCEPT

Note: Of course, this also works with a mobile broadband connection (usually called ppp0 on routing PC).

Read the iptables article for more information (especially saving


Internet Download Manager – the fastest download accelerator

Internet Download Manager – the fastest download accelerator

Internet Download Manager – The best way to handle your downloads and increase download speeds

Internet Download Manager (IDM) is a tool to increase download speeds by up to 5 times, resume and schedule downloads. Comprehensive error recovery and resume capability will restart broken or interrupted downloads due to lost connections, network problems, computer shutdowns, or unexpected power outages. Simple graphic user interface makes IDM user friendly and easy to use.

Internet Download Manager has a smart download logic accelerator that features intelligent dynamic file segmentation and safe multipart downloading technology to accelerate your downloads. Unlike other download managers and accelerators Internet Download Manager segments downloaded files dynamically during download process and reuses available connections without additional connect and login stages to achieve best acceleration performance.

Internet Download Manager supports proxy servers, ftp and http protocols, firewalls, redirects, cookies, authorization, MP3 audio and MPEG video content processing. IDM integrates seamlessly into Microsoft Internet Explorer, Netscape, MSN Explorer, AOL, Opera, Mozilla, Mozilla Firefox, Mozilla Firebird, Avant Browser, MyIE2, and all other popular browsers to automatically handle your downloads. You can also drag and drop files, or use Internet Download Manager from command line. Internet Download Manager can dial your modem at the set time, download the files you want, then hang up or even shut down your computer when it’s done.

Other features include multilingual support, zip preview, download categories, scheduler pro, sounds on different events, HTTPS support, queue processor, html help and tutorial, enhanced virus protection on download completion, progressive downloading with quotas (useful for connections that use some kind of fair access policy or FAP like Direcway, Direct PC, Hughes, etc.), built-in download accelerator, and many others.

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Satellite Communication | Satellite Internet | Phone | Radio | TV and DSL Internet | VoIP

Trac Vision TV

TracVision� HD11

link to GPS blog

satellite GPS blog

Does high speed internet service or digital tv programming
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You’re about to learn about some exciting new satellite technologies
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satellite dsl or broadband service via satellite, as well as,
conventional DSL Internet service from leading providers.

Gaining popularity worldwide, satellite


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Writer has built-in exporters for Google Drive, Evernote, Dropbox, WordPress, and more. You can also automatically convert directly to PDF, HTML, and even ePub ebook formats. Writer has you covered no matter how you want to share or distribute your documents. Your writing belongs to you and we try to enable as many ways as possible for you to use it.

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The Internet Health Test

Frequently Asked Questions

Pressing “start test” runs a series of individual measurement tests, each to a different place on the Internet. These individual tests are named “steps” in the current interface.

Each test (step) sends traffic to and from your device (laptop, phone, etc.) to a measurement point that is located outside of your ISP’s network.

This tests helps determine whether there is congestion at the connection between your ISP and another network that your ISP connects with. As more Internet users run tests from different locations, the more the source of a problem becomes clear.

These other networks, where the measurement points are located, are chosen because they represent locations where content and services that users like you would frequently access are hosted.

A test to a given location begins to indicate whether you can quickly get to content hosted in that location (or, whether your bank’s site (etc.) would load forever).

Depending on what region you’re in, the test will run against a different set of locations (so, varying number of “steps”). Note that locations outside of the United States are not as well covered as those within, and may be further away and show only one step.

Consistent results across all tests indicates that there is likely little congestion at the interconnection between your ISP and these varying “other networks” at the time you ran the test. Note, however, that congestion varies over the course of a day, so we encourage you to run tests multiple times over the course of a day.

Large differences between test results indicate that there are issues between your ISP and at least one other network. One test once won’t say anything conclusive (the problem could be local to your home connection, or a brief issue, etc.). But many tests taken together produce a lot of data, which over time begins to expose systemic problems and Net Neutrality violations.

Many speedtests run a test against measurement points located within your ISP’s network, or to a limited set of measurement points. Those tests measure the speed within your ISP, but not your performance to “the rest of the Internet.”

This test uses open-source code and M-Lab infrastructure, and tests against measurement points located at representative locations outside of your ISP’s network. In effect, this test measures whether you get adequate performance to The Internet, looking at various locations as representative of The Internet. Many speedtests measure only whether you get adequate performance within your ISP’s network.

This test focuses on showing whether your ISP’s interconnections with other networks are congested.

These “other networks” are those on which popular content and services are hosted. Interconnection congestion has become an important issue for the Open Internet, as intentional throttling of interconnection on the part of large ISPs is a tactic that has been used to demand payment from popular content and service providers. This practice results in users not having access to content and services that don’t pay — which results in a non-neutral


Satellite Internet and information about how it works


Helpful details about VSAT services, beam coverages, antenna pointing, how it works, discussion and help forum.

The above five regional links provide my review details of a number of
businesses providing satellite internet and satellite broadband to end user customers. Due to the many providers set up in the past fifteen years you need to read
those pages carefully and also review the further entries listed towards the
ends of those pages. If you want your details included, just tell me: eric@satsig.net. There is no charge.

This web site is not commercial and we don’t sell anything, we are here to promote legitimate, satcom access for people in all locations, who are unable to gain access using
terrestrial ADSL via copper or optical fibre phone lines or using cable modems. Satcom is an alternative and provides independent
small-dish two-way access from anywhere except the extreme polar regions.

Dish pointing:

Find your latitude and longitude
(For VSAT and satellite TV dish pointing – gives image of your house plus azimuth, elevation and polarization angles).

Discussion forum:

Go to my Satellite Internet forum and tell us your problems or help others with your experiences, or announce your services.

or view the 20 recent posts now.

Other pages on this web site:

List of satellites in the geostationary orbit

Satellite link budget calculator

Design a satellite beam

VSAT information index

Maps and latitude and longitude index

Index to personal, holidays and miscellaneous pages

Noise temperature, noise figure and noise factor

Microwave spectrum analysers for sale & hire

Frequency spectrums

On-line spectrum analyser (Not presently in working)

Great circle azimuth calculator, lat, long, bearing & range for point-to-point terrestrial applications and sailing

Pictures of some geostationary satellites taken from the ground

How to set up antenna reflector panels using fishing line

Axial ratio and cross polar discrimination ( XPD ) interference

Eutelsat beacon frequencies

Explanation of satellite TV Polar mount plus examples

Ku transmit reject / receive bandpass filters for sale


See a satellite photo of your home

Information about interference if you operate in C band

Teleport hub antenna
Teleport hub

HP8560A spectrum analyser

My HP8560A spectrum analyser

Ku band VSAT dish

Ku band VSAT

Search this site  click here >  SATSIG search

There are over 300 communications satellites in the geostationary orbit, directly above the equator, spaced typically 2 or 3
degrees apart. Because they orbit the earth at the same speed and in the same direction as the earth rotates they remain fixed in the sky and you can
use a fixed pointing very small aperture terminal (VSAT) to communicate. The maximum possible coverage area from any one orbit position is approx one
third of the earth, as that is all that is