I have A Cisco 877 Router with all ports forwarded to the correct IPs.
For some reason external users are having issues connecting either with OWA or RPC over HTTP.
The user connects fine and sends/receives emails then for no reason at all he sudenly cannot connect (RPC) or the page is not fully displayed (OWA). If we do nothing the connection comes back after around 3-4 hours. If we reboot the router everyhing connects fine.
During the connection loss the user can still access our FTP site which is also port forwarded via the router.
Any ideas on this would be more than helpful.