Re: Limit Single Instance

"Gordon Beaton" <not@xxxxxxxxx> wrote in message
news:43e057a1$1@xxxxxxxxxxxxxxxxxx
> On Tue, 31 Jan 2006 21:33:16 -0000, Allan Bruce wrote:
> > I had thought of something similar - my only worry is if a firewall does
> > anything to interfere with this?
>
> If you are running a firewall on the host where the application runs,
> shouldn't it allow connections to itself?

To be able to use this method, the application would need to set up a
ServerSocket (to listen for other instances which are starting up).

ZoneAlarm, for example, will ask the user whether or not you wish to allow
program X access to the internet and/or the local network. It will also ask
you if you want to allow program X to act as a server. I'm guessing that
you'll see at least the server message pop up with this method.

Although I think it is a very good method, the main disadvantage would be
mistrusting users, who would immediately question the reasons why your
program would act as a server. The fact that not-so-knowledgeable users
nowadays are almost always advised to "trust nobody" because of virii and
malware, isn't helping this either.

I'll run a simple test later on this evening, and post my findings here.

Regards,

JC
--
http://jcsnippets.atspace.com
a collection of source code, tips and tricks


.

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