I have a linksys router on what is supposed to be open static IP on the internet. Behind it is a connection to a corporate network Ouside is a 64.x.x.x address with 64.x.x.1 as the gateway and inside I have a link to a 10.x.x.x network with the routers ip as 10.x.x.2. DHCP server is not being used since the network already has one internally. From my understanding there is not a firewall between the router and the internet. When I first get everything up and running I can ping the router from the outside no problem for a period of time. After a while (could be 5 minutes could be an hour) pings stop returning and I cannot connect what so ever from the outside. Internally connections work great and the logs show no errors on the router. Its just like it has been cut off. I have tried this setup with an RV042 and a BEFSX41. Same results in both cases. During my trouble shooting I have disabled all Firwalling and even completely opened up the router for access. Nothing seems to get me a consisten result. The only thing that give me access from the outside again is restarting the router. I have tried several IP's on the subnet for the 64.x.x.x with the same results. Could this be some SNMP management monitoring the external range? I am baffled!