I have set up the main office with a RV042 and 2 remote offices with the BEFSX41 and have configured the VPN and got them to function. The problem I am having is that the VPN is very slow. The primary office (with the RV042) is on DSL with 784/368 connectivity (static IP), one remote office is on DSL with 784/368 (dynamic IP) and the other remote office is on cable modem with 1 Mb/256 (static IP). Both remote offices are extremely slow when accessing data over the VPN. Web browsing and downloading is fine. As a quick test, I temporariliy opened a port at the main office and accessed from a remote offices (with the VPN turned off) and saw good speeds, so I believe the speed issue is due to the VPN config. I have read that MTU should be reduced to allow for VPN overhead. I have done that on the RV042 side, but I can not do that for the remote offices. The BEFSX41 has the MTU setting under the ISP information. When I change that from auto to any number, I lose all internet connectivity. When I change it back to auto, Internet connectivity returns. I have done a search and see that several people have posted about this MTU setting issue on other forums, but nobody seems to have a good answer except to set back to auto. I also read in several places that changing the MTU setting seems to only affect outgoing packets. I do not know what version firmware is on each (I have to get back into the office to see). But, I was hoping that someone here would have some ideas on what I can do to improve VPN performance and/or modify the MTU setting to help boost performance. Doing a few ping -l tests, it appears the best round trip times is around a packet size of 1150. Does this sound right? Thanks!