<div>
All a firewall does it block unnecessary ports. And allow ones which are necessary eg port 80 for http.<br />
in my case Sybase woudl be using port 2638.<br />
so its as simple as changing your firewall to allow that port through...<br />
Just find out which port your database communicates with &nbsp;and allow it through the firewall..<br />
If you have no access to the firewall.. <br />
I can't see there is much you can do.
</div>


All a firewall does it block unnecessary ports. And allow ones which are necessary eg port 80 for http.
in my case Sybase woudl be using port 2638.
so its as simple as changing your firewall to allow that port through...
Just find out which port your database communicates with  and allow it through the firewall..
If you have no access to the firewall..
I can't see there is much you can do.

<div>
cam rat, this is not completely true... Many firewalls are actually proxy servers - meaning that they stand inbetween client and server and are involved in the protocol. This makes things more complicated.<br />
<br />
However, I believe that it is true that all can be configured to allow unrestricted traffic (i.e. no proxy function) on certain ports. Hoewver, then you have to know the ports involved. To make things even worse, some protocols (like FTP for example) initiate connections on a known port, but then spawn other connections on other ports as needed (the FTP control channel versus the data channels.) I am not sure if any of the db vendor's protocols do this.
</div>


cam rat, this is not completely true... Many firewalls are actually proxy servers - meaning that they stand inbetween client and server and are involved in the protocol. This makes things more complicated.

However, I believe that it is true that all can be configured to allow unrestricted traffic (i.e. no proxy function) on certain ports. Hoewver, then you have to know the ports involved. To make things even worse, some protocols (like FTP for example) initiate connections on a known port, but then spawn other connections on other ports as needed (the FTP control channel versus the data channels.) I am not sure if any of the db vendor's protocols do this.

<div>
<div class="content wysiwyg-content">
Is there any difference in reading data from databases(using jdbc)which are behind a firewall? Do i have to use special tools? <br />

</div>
</div>


Is there any difference in reading data from databases(using jdbc)which are behind a firewall? Do i have to use special tools? 


reading database behind a firewall

Java is a platform-independent, object-oriented programming language and run-time environment, designed to have as few implementation dependencies as possible such that developers can write one set of code across all platforms using libraries. Most devices will not run Java natively, and require a run-time component to be installed in order to execute a Java program.