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Published
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February 10, 2007 |
Last Updated |
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August 06, 2007 |
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Introduction |
In this article I will
show you how to publish a server that has ULTRA VNC
installed on it so that you can remotely control
this server from External Networks using ULTRA VNC.
You can download ULTRA VNC which is a free software than can be downloaded from
here
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You can
remotely control machines behind ISA server with VNC
using either of these two methods:
1 - With VNC Viewer
, using inbound TCP port 5900
2 - With any web browser, using inbound TCP port 5800
Configuration on ISA Server
We will start with creating a
publishing rule for the VNC Viewer
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Open ISA Management Console
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Right click Firewall Policy and
click on New , then click on
Non-Web Server Protocol Publishing Rule

This also can be done from the Right Pane,
under the Tasks bar :

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The New Server Publishing Rule Wizard will be launched,
give a name to your new rule , in this article we
will name it ULTRA VNC Viewer, then click
Next

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Enter the IP Address of the server you want to
publish,
, then click
Next. If you do not know the IP address
of the server, then click on Browse to
get the IP address of the server using its name.

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Now we need to enter the protocol used by the
published server, click on the New
Button

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Enter a name for the protocol we want to create. I
want to create the VNC Viewer protocol, so I will
name it VNC Viewer

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Click on the New Button

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Select the following:
Protocol Type : TCP
Direction : Inbound
Port Range : From 5900 To
5900 as shown

Then click on OK

The protocol we just created will be
displayed, Click Next
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We will not create any Secondary Connections,
so ignore this page and click on Next

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The Completing the New Protocol Definition
Wizard page will be displayed now,
review it and then click on Finish

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After finishing creating the protocol, we will go
back to the Select Protocol page,
click on Next

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We need to specify the Network Listener IP
Address, choose External,
then click on Address

Select Specified IP address on the
ISA Server computer in the selected network,
and under the Available IP Address
, select the IP address of ISA server Public IP,
Click on Add and then click on
OK. Then click Next

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Review the Publishing rule you have just created and
then click on Finish

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The rule we created will look like this :

Now I will start creating a
publishing rule for controlling VNC server using
any web browser.
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Right click
Firewall Policy and
click on New , then click on
Non-Web Server Protocol Publishing Rule
- The New Server Publishing Rule Wizard will be launched,
give a name to your new rule , in this article we
will name it ULTRA VNC Web, then click Next

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Enter the IP Address of the server you want to
publish,
, then click
Next.

- Now we need to create a new TCP Inbound protocol , click on the
New
Button

- Name the protocol VNC Web. Click
Next

- Click on the
New Button

- Select the following:
Protocol Type : TCP
Direction : Inbound
Port Range : From 5800 To 5800 as shown

Then click on OK

The protocol we just created will be
displayed, Click Next
- We will not create any
Secondary Connections,
so ignore this page and click on Next

- The
Completing the New Protocol Definition
Wizard page will be displayed now,
review it and then click on Finish

- After finishing creating the protocol, we will go
back to the Select Protocol page,
click on Next

- We need to specify the
Network Listener IP
Address, choose External,
then click on Address

Select Specified IP address on the
ISA Server computer in the selected network,
and under the Available IP Address , select the IP address of ISA server Public IP,
Click on Add and then click on
OK. Then click Next

- Review the Publishing rule you have just created and
then click on Finish

- The rules we created will look like this :

Now its time to connect using the VNC Viewer and
will also try using Internet Explorer 7 .
- Install the VNC Viewer on any client machine and
open it. Enter the Your domain name or Public IP,
and click on Connect

You will get an authentication box to enter the
password you have configured on the VNC Server. Once
your enter this password, you will start having
remote control of the server.

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The second method is by using any web browser, I
will be using IE7, all you need to do is enter the
following URL:
http://DomainName:5800 OR
http://PublicIP:5800

You will also have a textbox to enter the password
you configured on the VNC Server.
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One last note, set
ULTRA VNC Server that you are publishing
as SecureNet Client, this is done by
setting its Default Gateway to be ISA Server Internal
IP
Summary
In
this article, we learned how to publish a server behind
ISA server to remotely control it using ULTRA VNC.
You can use VNC in two methods, either using the VNC Viewer or by using
any web browser.
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