I have a Linksys RV082 router behind a Comcast business internet connection. I cannot reach a group of IP addresses from the RV082 and in return the IP addresses cannot reach me (can't ping, email or tracert). I have basic defaults on the router, nothing fancy. I use the RV082 diagnostic tool to perform a ping to any IP address starting with 75.126 and the test fails. However when I perform the same test from the Comcast cable modem it is successful. So for some reason the traffic is being blocked by the router. I have tried everything I can think of, access rules, disabling SPI, changing the MTU size, disabling the firewall completely and still no luck. I posted on the Linksys forum and have not gotten any responses. The only odd thing I notice is in the RV082 system log when I attempt the ping to 75.126.xxx.xxx it says it was successful but it shows the traffic actually going to our Comcast Gateway IP address. When I perform a test ping that is successful 74.208.xxx.xxx for example it shows the traffic going to that address.