Why Does and Exe Tries to Contact My ISP DNS ?

[leegold]

Hi,

I compile my aue into and exe file. I ran the exe and my firewall showed that when I run the exe something tries to make contact with my ISP's DNS server.

It occured to me I start the program with _FFConnect(). But that's a telnet to Mozrepl in Firefox. Isn't it? Could that be doing it?

If I block the access "request" by the exe to the DNS server it doesn't work. It runs but no GUI and I think it times out.

Thanks
 

 

[michaelslamet]

Anything that need to resolve hostname <-> ip address will contact the DNS server

[czardas]

It could be something to do with the way you are handling the _FFConnect() error in your script. If you prevent internet access, you need to look again at your code and check you have a method to handle such a situation.

If the script runs okay when not compiled it could be that it is able to access the internet because of firewall permissions you have set (or which may have been set automatically). It might be an idea to post some code if you can't solve it yourself.

Edited July 16, 2013 by czardas

[leegold]

So with the code below if I do "Go" from Scite it does not try to contact the DNS server. But if I compile it to a exe and run it, it does try to contact the DNS server. Yes I guess 127.0.0.1 is an IP that is going to be resolved, but I thought it happens in my local host file. And why does attempted DNS access only happen when I run the exe? Again if when running the exe I deny access to the DNS server the script will not run...Thanks, no major issue, but I'd like to know why this happens.

#include <GUIConstantsEx.au3>
#include <FF.au3>

If Not _FFConnect(Default, Default, 6000) Then
    MsgBox(0,"","Can Not Connect")
Else
    MsgBox(0,"","Yes, I Can Connect")
EndIf

[BrewManNH]

IP addresses aren't resolved using DNS, they're already "resolved" because you're using an IP Address. DNS is only used when you have a URL or computer name that you need converted to an IP address so that the computer/internet hardware can find it on the network/internet. TCP and UDP don't work with names, they need IP addresses.

I don't see where in the FF script that it would try to resolve any names to IP addresses unless it's in the mozrepl plugin.

[leegold]

Why only when the exe runs and not the same code from SciTe->Go? I've played with Mozrepl a lot with telnet clients and telnet packages in other languages, only the exe causes this so far. I'll find a Mozrepl forum if I can and ask. Thank You.

[UEZ]

Might be a security check by the OS (Windows Open File Security Warning). When you download an exe from the i-net and start it afterwards then some security checks will be made and a server will be connected - might be a MS server.

Might be the same security check.

Br,

UEZ

Edited July 16, 2013 by UEZ