Hi Friends,
I got here a lot of very good knowledge and concepts.
I would like to thank everyone who is able to give the right answer and did.
However, three major matters are confusing me until now:
1. Why dose application needs local connection?
• For example: from 127.0.0.1 0.0.0.0 and visa versa.
• Why a browser like Netscape open about 4 ports locally, which are addressed like the upper example, while an internet explorer only open an 1 local UDP connection.
• In addition, why my Antivirus need a local connection for his Common Client Application Service. Should I block it?
2. What is the meaning of the following:
• Socket 127.0.0.1:1234 0.0.0.0:0
• Socket 0.0.0.0:0 127.0.0.1:1234
• Socket 127.0.0.1: 1245 0.0.0.0: 1233
• Socket 0.0.0.0:1232 127.0.0.1:1232
• What is port 0?
• What is 0.0.0.0:0, and the different from 0.0.0.0:1212?
• When I see the UDP distention IP and port are *.*? Does it mean to Everywhere?
3. Finally,- and the most important - I have installed Sygate Professional edition, and when I tried to uninstall the product to do some experiment, I am no more able to connect to the internet? I reinstalled sygate professional edition again, and I find in the logged report that it is blocking me to access the DNS.
4. I am behind a proxy. So when I am trying to connect to the internet, it shows that it is trying to connect to the proxy itself (its number is shown in the status bar of IE), then I lose connectivity.
It has seems that the firewall blocked my connection to DNS.
I tried to allow all communication of any type in the advanced rule. Nevertheless, it did not work.
I stopped Sygate. Still not working.
In addition, I stopped the option, which tell to stop any connection if Sygate service is not running? Unfortunately, it did not work also.
What happen to my connection? I do not really know what is going on.
Therefore, could you please help me?
I know that my questions are very long and annoying but these – as I know- the major leak in my knowledge about the subject.
Thank you very much for your help.