What VPN client software is available for ATP series?

e_mano_e

Currently I'm using the old ShrewSoft VPN client to connect to ATP Firewall.
I'm using IPSEC VPN.
ShrewSoft is really old.
Which other software is available for VPN connections?
Zyxel SecuExtender is too expensive and I do not like the yearly subscription.
It seems OpenVPN does not work with ATP (I never tried it).

Any hints would be great.

osake_li_09

There are other options without using paid Zyxel SecuExtender IPSec VPN client.

Use Windows build-in L2TP VPN or SecuExtender SSL VPN client(Windows version) which not request a paid license.