Until recently I had configured PPTP and L2TP. They were ending at the different devices (PPTP - SBS 2011, L2TP - Zyxel USG 100 ) I have now strange behavior, I can connect and browse for some folders but not larger (by size) . To be even stranger some client can browse and some cannot.
So I installed SSTP to avoid different ports that needs to be opened, and it takes longer time to load and display folders than PPTP and L2TP. I saw that sometimes this slow behavior can cause NOD32 antivirus , mine is AVIRA.
Can someone please help. I read that this can be because of MTU. Do I need to change MTU on both SBS and Zyxel or client side ?
Thanks