We are running sbs 2003 acting as exchange server, DC, and file server.
It is a brand new install (which I have done many times).
On our BT bussiness hub we have ports 25 and 80 open for incoming traffic to the server.
We also have logmein installed.
Im almost certain everything is setup correctly - dns is installed on the server, dhcp is also installed and client machines have the server ip as their dns address.
Every couple of hours though, the server becomes un-contactable from outside the LAN - if I try to access OWA, it times out, if I run an online port checker it reports that no ports are responding, and if I try and access the server with logmein, it also times out.
I can however access another computer within the network via logmein, and I can then get onto the server with remote desktop.
So by process of ilimination, I gather it is not the broadband connection or the router (unless the router has an issue specific to the server).
After ten minutes or so, it all starts working again.
The only thing that stands out to me, is that we have 10 client licenses and we are hitting this limit, I wonder if the server would stop responding to WAN requests once this limit is reached? Or is there any other troubleshooting steps I can take?