Actually, just read this is Server/Gateway only in any case - I'm on server only
Xl2tpd - I don't know but we can test it. It is to do with ipsec rather than xl2tpd.
You'll need to come and speak to me and Mr Terry 'The Test' Fage on Rocket as I can build stuff on the fly for you or tell you how to modify templates to test.
Downloads are about 1.2 Mb/s whilst uploads are pretty bad at 300Kb/s
Speeds are relative. How fast are the connections? Note - as you know ADSL is Asymmetric so the uploads are always going to be pants.
As usual I am running out of time...
It is a wise man who has second thoughts first.....
I was lucky as I was forced to do all this 13 years ago when we moved to Spain. So we run two offices in two countries. That forces your hand and effectively we all work remotely now with SME generally on a Proxmox VM in my server at online.net It was the last nail in the coffin of Windows as we used Sage and there was no easy way to use it online or networked across sites in those days, so we dumped it for a web based accounts - best decision ever as I could also lose Windows !
Trying to access files in real time over links is no fun at all, unless you have really fast access. We moved when 1Mb ADSL was the norm. That forces your hand.
I use unison file sync to sync all our file data between the two offices - there is way to much and the files are too big to store in the 'Cloud'.
They key here is what is your office connection speed. That will dictate what you can or cannot do no matter the type of VPN.
It may not be just a case of fixing your VPN, but reconsidering your entire IT strategy.
Either way, if you want some stuff to play about with by all means ask for a Rocket login.