I'm considering using Asus RT-N16 routers with VPN mods to tie together 10 small offices. What sort of VPN throughput could I expect from that router? Only one of the 10 offices has truly fast broadband and the rest are in the 2-4Mb download range. Also under consideration, but much less likely to happen, is to try Squid on the router for better control of who has web access. I don't want to cache anything, only allow/deny web access and grant restricted web access. Has this been done? Pfsense on a low-end PC might be a smarter option but a diskless/fanless solution is attractive.