This is weird. When I do a standard open port test at grc.com on my SBS, it shows a number ports that are either open or replying as present or 'closed." In the past, with my previous SBS box, everything was stealthed except for 25, 443, and a few ports intentionally open.
New SBS 2003 R2 Premium. ISA 2004 was installed and later uninstalled. I also used the CEICW several times with uPnP on and off to test various things.
Also, when I try to enable the built in Windows Firewall, a message stating "Windows Fireall cannot run because another program or service is running that might use the network address translation component (Ipnat.sys).
RAS is running, Windows VPN, SharePoint, OWA, Remote Workspace all are running. I have a commercial SSL certificate, too FWIW.
Only using 1 NIC behind a Linksys RV042 router. The other NIC is disabled. The router was previously set for uPnP while several test installations and configurations of SBS were carried out. uPnP is now turned off and all the rules that were once there have been deleted.
The Linksys has One-to-One NAT enabled for the WAN IP to point to 192.168.xxx.xxx. The Linksys access rules show only 25, 443 and the few other ports that would be used in the above configurations.
Why does POP3, IMAP, FTP -- and a bunch of others -- show up as "closed?" In the past, these were Stealthed.
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