No the Linux ports visible to the Host

I have the W7 64bit Host Vox4.1.8 and two OL5.7 64bit Guests, Say G1&2.
The Host Only Network has been setup for the guests.
there have been the applications deployed on the both guests. all have been running no problem for a few months.
Now I have found no ports on the G1 are visible to the W7 Host, which was not the case before:
I can ping G1 server IP but no ports of G1 can be accessed from W7 Host;
I can access all the ports of G2 from W7 Host;
From G2 I can access all the ports of G1, and From G1 I can access all the ports of G2;
All the applications on G1 are running normal. I access the Host and Internet from G1 no problem.
I tried to turn off the firewall of the host but no luck.
I am not sure what have canaged on G1 since last reboot.
Please help with the troubleshoot.
Edited by: gadba on Apr 15, 2012 7:49 AM

please help me by giving the solution.Help yourself by fixing the connection settings OR your network. The error is very clear: no connection can be made to the database. So what could it be? Wrong IP? A firewall is blocking you somewhere?
Nobody can tell you, you are the only one with access to your server settings and network environment.

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    Steven Lee
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