General Technical Requirements General Information
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- Client-Side Requirements
- Processor speed (MHz) memory (RAM)
- Browser Plugins
- Additional software
- Configuration Notes for Corporate Networks
The Englishtown School self-study content is 100% web-based and consists primarily of
Macromedia Flash applications along with HTML and DHTML text and image elements which
are assembled using Microsoft ASP technology.
Live discussion session are offered to premium subscribers through the Englishtown Virtual
Classroom client which is powered by Centra Software’s Symposium product. You can read
more about Centra here:
These specifications are offered only as a preliminary step and they will be refined and
revised, as needed, depending on discussions between the customer and Englishtown.
The basic client side hardware and software requirements are summarized below:
PC with a Pentium II, P-III or Celeron processor.
Englishtown does not support the Macintosh operating
system. Pentium III or higher processor recommended
Processor speed (MHz) &
350+ MHz, 64+ MB memory
Windows 98, 2000, NT, or XP
Sound Blaster 16 compatible sound card or better
Headset with microphone, or separate microphone and
800 x 600 screen resolution
Recommended: 1024 x 768 screen resolution
Internet Explorer 5.5 SP1 or higher.
Recommended: Internet Explorer 6.0 SP1or higher -
Englishtown does not support the Netscape browser.
Macromedia Flash version 6.0.65 plug-in (available as
free download). 7.0.14 recommended
Englishtown Virtual Classroom Centra software
(automatically installed) is required to use voice-over-IP
Adobe Acrobat Reader (for business courses only)
General Server-Side Requirements
Englishtown ASP is compatible with all firewall configurations that enable users to access
the Internet using ports 80. We recommend for security purposes to open port 1709 for our
. We also recommend to open port 1935 for our
. This is more secure solution and provides better voice
quality than tunneling through port 80.
If Englishtown for LMS is deployed, Englishtown’s school content servers must be able to
communicate with the customer’s LMS server over port 80 in order to send student data back to
Englishtown uses Internet technologies that are fully compatible with proxy servers. If you are
using a “stateful inspection” proxy server, MIME ID “launcher.CRND” has to be opened
In order to
access Englishtown from a client using a proxy server, port 80 must be open bi-directionally, and
port 443 (for HTTPS traffic) should be open inbound. In most cases, this is the standard
configuration. In addition, with Microsoft Proxy Server the client should be able to authenticate
using Basic Authentication (clear text authentication) or the client workstations must have MS
Proxy Client installed to handle the proxy server authentication.
In the event that a client is having trouble accessing Englishtown through a proxy server, it is
possible to bypass the proxy server using a static route for the Englishtown servers with the
gateway set to be the firewall or Internet router. This will only work, however, if the Proxy server is
not set up with separate inside and outside subnets.
Each corporate network has its own special configurations and security issues. Some points of
Englishtown site are affected by these configurations, and the possible solutions vary from
customer to customer, depending on the firewall and/or proxy configurations.
As a general guideline, we can list the following points:
The network protection systems (“firewalls” and “proxies”) must be configured to allow sound
files “download” (wav, asf, .wmf, mp3 etc.). Audio streaming permission is not needed. If
necessary allow these to be restricted to *.englishtown.com
The Englishtown students must have access to all internet sites with names ending on
“englishtown.com”, despite its host names or IP addresses. Modern firewall systems usually
allow this kind of “domain-based” configuration, instead of old style “IP-based” access
There is no special configurations for “return connections” (connections made from external
hosts to internal client workstations). Usually the proxy system itself takes care of this.
Firewall systems must allow “established return connections” from Internet to Intranet, as
usual. The general guideline is: if you can simply browse Englishtown site pages, you are
The Englishtown Virtual Classroom (i.e. the Centra Symposium) client is compatible with
packet filtering devices. Firewalls do NOT have to be reconfigured to support the EVC.
audio, application sharing and user interactions. If port 1709 is not available (because, for
example, the client is behind a firewall), the EVC client will automatically use tunneling over
HTTP (port 80).
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