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Win2k3 Port check


I have Win2k3 server, where ICS enabled. I have couple of third party applications installed in it. One of those very important is an email application. Which sync mails between the user and server. Our mail hosted by third party ISP. So for people who dont have internet access inside organization will configure them in this email application.

Very recently I started facing... all the ports getting closed after some time.

If reboot the server everything works fine.

After some time if telnet port no 110, i dont get welcome banner.

samething happens to RDP also.

Any idea to check how the ports getting closed. During this time I can ping the server.

If cmd > netstat -a

I am seeing pop, smtp and rdp listining!!!!!!!
3 Solutions
SteveIT ManagerCommented:
Do you have a firewall in place ? if so have you checked its logs to analyse the traffic/useage ?
ICS is enabled means win2003 server Firewall is also ON .So configure theses required ports using exception settings, and also check the Anti-virus installed on your server with integrated firewall like Symantec Corporate Edition OR Mcaffe Antivirus.

For Win2k3 Firewall Configuration : http://www.netadmintools.com/art424.html

TO check which ports are open use these URLs


But Now Main problem is how these email & RDP ports ( 110 & 3389) are automatically closed ..It means your other Third Party applications are also using the same port or win2k3 local email server using the pop port.

MuraliAuthor Commented:
I did not had any problem till now. Today only it is started. Nothing has been changed?
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MuraliAuthor Commented:
The ports are accessible for some time and for some time not.

Once It go down, i cannot use those untill I restart the server.
Can you check that you are not limiting the amount of data through the network connection?  You may have something that says after a certain amount of Megabytes or Gigabytes to stop sharing.  I believe this would be found within the ICS firewall settings but I'm not sure

note -  you might get better response win the Win2k3 section as this is more focused on the server than an XP machine
MuraliAuthor Commented:
Dont know the reason... But started working fine after putting firewall off..

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