DeNino

Hi everyone, i found the problem, the ISP router in sites C and D (that is connected to the wan port of the firewalls) was using the same ip subnet for the LAN that i use at home, i changed it and now it works. thanks everyone for the support.

hi @Zyxel_Jeff, thanks for your reply. i don't see any blocking messages, and on the ZyWALL IPSec VPN Client software the connection is stalibited and green, but i can't ping any clients on the other side. the strange thing is that if I connect from the office to the other sites A, B, C, or D the VPN is active and I reach…