My provider (Magma Communications) has recently started selling routed blocks of IP addresses for PPPoE accounts. I have ordered a block of 8. So they could ensure it really works, my provider has successfully configured a BEFSR41v3 router to support a block of 8 IPs (5 usable) by configuring the LAN IP and subnet mask on the router to the first usable address in the block and turning NAT and dynamic routing off. Figuring that I could get this set up, I bought a BEFSR41 router but mine is a v4. After trying the initial firmware and then upgrading to the latest 1.04.05, my ISP and I have determined that between versions 3 and 4, this function no longer works. You can ping both the LAN and WAN IPs of the router and the router successfully connects to the ISP via PPPoE and gets the address that the block is routed to but traffic essentially doesn't pass any further. My provider was able to ping the WAN IP at times but most packets were dropped or had very high ping times. Linksys has offered to replace my v4 with a v3 but the front-line support folks can't grasp what it is I'm trying to do and won't escalate the probable firmware problem to fix it in the v4 firmware. It looks like I'll have to RMA it in favour of a v3. I don't want to as I believe they've come out with v4 for some reason, conceivably to improve on the previous version. IMHO, if they advertise and offer the ability to turn NAT off and use the advanced routing functions to basically make the router a "regular" router instead of a NAT router, than it should work or they should fix it to make it work. I have read in another post that you cannot apply v3 firmware to a v4 so Iâ€™m not going to try. Has anyone had this problem; found a fix or a workaround; knows what the heck I'm talking about? Thanks.