I want a simple way to grab my phone and leave my office and have my full pbx functions with me, with minimal to zero downtime involved with dynamic IP updates and TM FW updates. At present that "set up" can take around 10 mins. Lowering the TM refresh time only goes so far down due to the time it takes the firewall to refresh.

So for a next article maybe you can write us up either a) how to have a vpn like this w/ dynamic IP on one (or both) sides or a way to dynamically add whitelist IPs to the firewall w/o having to restart it (I’ve read things that make me think it’s possible but I’m not linux savvy enough to figure it out on my own.)

Thanks for the content Ward.

[WM: You just can’t do it (safely) with Asterisk and FreePBX. You’ll have firewall security issues as well as NAT router audio problems from various sites. The preconfigured Raspberry Pi solves those two issues. Another option which may be a better fit for what you’re looking for is to deploy an OpenSIPS server in the Cloud to marry to your Asterisk server. We began that series today on Nerd Vittles, and next week we’ll show you how to tie it back to an Asterisk server at your home base. Then you’ll have a solution for any smartphone that "just works" without having to worry about IPtables and punching holes in your firewall.]