Firewalls

**freesoft_2000** · 07-30-2005, 01:18 PM

Hi everyone,

I am trying to set the properties so that i can reach
URL's using the Java URL class but usually i use this if there is a proxy

Code:

System.setProperty("http.proxyHost","proxy");
System.setProperty("http.proxyPort","80");

but after visiting some sites they said that if i want to connect to a URL
outside a firewall(not sure if proxy and firewall are the same thing) i
must do this and not the above code i listed
but the one below

Code:

System.setProperty("firewallHost", "proxy");
System.setProperty("firewallPort", "80");

The thing is i can't seem to find any information on
Sun's site or on google using the firewallHost property. Currently i don't
use a firewall so i can't really test this code out and would really
appreciate any insight from anyone about this.

I also have a feeling that the firewallHost property is
an old property that isn't used anymore but the thing is i can't confirm
it.

From what i know is that if i have to reach a url via a
proxy i would usually use the first code i listed above but what about
reaching a url via a firewall. Aren't the codes the same as the first code
i listed above?? Someone correct me if i am wrong

If they are not what is the correct way to do it?
Links to sites or sample codes would be helpful

Any help is greatly appreciated

Thank You

Your Sincerely

Richard West

**Zodoz** · 07-31-2005, 08:05 PM

I have done a few netwok related programs and now have a simple test chat that works on the internet, and what I've learned from this (though it is not URL based) is that as long as the computer that you are connecting TO is not behind a router or firewall, there is no problem. It does not seem to matter wether or not the user's computer is behind a filewall, proxy, or router... only the server computer. I will however examine the JavaDocs more closely and post a little later on with a more URL related answer. But for the time being, I hope this might help.