why can't I open a port on Win 7? is it the app's fault?
- by rjnagle
I am having problems opening a port from one Windows PC on my local network.
On Windows 7 computer ("Computer A") I running Calibre, an ebook management program that has something called an "ebook content server" . In essence, it serves via the web a content catalog.
From Computer A, I can access the content server on localhost. ie. http://127.0.0.1:8787 calls up the content server successfully.
With ipconfig I have confirmed that its local IP address is 192.168.1.106
From Computer B (a Vista Machine) I can ping 192.168.1.106
I have tried opening/editing a port in the Windows Firewall several times.
In Windows firewall -- Allowed Programs in Control Panel, I see a listing for
Calibre (with both Home/Work and PUblic checked)
In details, I see Name: Calibre, Port Number 8787, Protocol TCP
If I use the Advanced Security configuration screen for the firewall, I created an Inbound Rule on Computer A for Calibre (with the settings I indicated).
If I run this command line on Computer A, I see:
netstat -a -n
TCP 0.0.0.0:554 0.0.0.0:0 LISTENING
TCP 0.0.0.0:664 0.0.0.0:0 LISTENING
TCP 0.0.0.0:2869 0.0.0.0:0 LISTENING
TCP 0.0.0.0:3306 0.0.0.0:0 LISTENING
TCP 0.0.0.0:5357 0.0.0.0:0 LISTENING
TCP 0.0.0.0:6570 0.0.0.0:0 LISTENING
TCP 0.0.0.0:6580 0.0.0.0:0 LISTENING
TCP 0.0.0.0:8787 0.0.0.0:0 LISTENING
TCP 0.0.0.0:10243 0.0.0.0:0 LISTENING
TCP 192.168.1.106:63020 74.125.227.51:80 TIME_WAIT
TCP [::]:80 [::]:0 LISTENING
TCP [::]:135 [::]:0 LISTENING
TCP [::]:443 [::]:0 LISTENING
TCP [::]:445 [::]:0 LISTENING
TCP [::]:554 [::]:0 LISTENING
TCP [::]:2869 [::]:0 LISTENING
TCP [::]:5357 [::]:0 LISTENING
TCP [::]:6570 [::]:0 LISTENING
TCP [::]:6580 [::]:0 LISTENING
TCP [::]:10243 [::]:0 LISTENING
TCP [::]:49152 [::]:0 LISTENING
TCP [::]:49153 [::]:0 LISTENING
TCP [::]:49154 [::]:0 LISTENING
TCP [::]:49155 [::]:0 LISTENING
TCP [::]:49170 [::]:0 LISTENING
And lots of other junk, but this seems relevant, I see port 80 is open (I run xampp apache web server for windows on Machine A) This is the only time I see port 8787 referenced from the netstat commmand.
From Windows Computer B, I can, ping 192.168.1.106 and even view http://drupal.local (on Computer A) and http://192.168.1.106/ (which goes to the Xampp config screen on Computer A).
But I cannot access via Computer B htttp://192.168.1.106:8787 or htttp://computerhosta:8787
So what is going wrong? Is this a problem with the Calibre application or have I incorrectly opened the port? What things could possibly interfere with the opening of this port?
On a sidenote, I have tried using telnet from Computer B to see if port 80 or 8787 is open for 192.168.1.106. I get no reply for either one.
Thanks.
