Open Ports Command

[bobcumbers]

Hi and thanks for looking in.

MS Small Business Server / Windows Server 2003 (no ISA server) with a CISCO ISA5500 Security Appliance front door. 2 NICs. One to outside runs to Cisco device then to internet; second NIC is for Internal net which uses simple HP switch. No other control or routing devices.

Second server runs Windows Server 2003 and custom app which requires unique ports to be open to outside world.

I need to make sure a number of ports (49515 - 49525 TCP/IP & UDP) are open. CISCO appliance is configured correctly to open these ports. The device is set to send/receive on those ports when initiated from internal sources. On the second custom app server, it appears communications occur as data can be downloaded and uploaded. But app indicates it is being firewalled in some way and does not give a specific error message.

Using NMAP 4.00 (port monitor), I note none of the ports necessary (49515 - 49525)are open on either server eventhough it appears communications is occurring.

So question is, how do I make sure Windows 2003 on each server is configured correctly to explicitly allow the ports? (Windows Firewall is NOT running as I get another message that IPNAT.sys may be running by another program or service.

Thanks for your interest and help.

 

[wchull]

A couple of things come to mind. One is running NETSTAT (netstat -a | find "LISTENING") or (netstat -ano) will give you a listing of what ports are listening ports or all ports in use.