Yes, with the new firmware v1.3.9.14, the ADW-4401v4 can support the PPTP Server and IPSec VPN functions. For these advanced VPN features, the ADW-4401v4 can establish a secure VPN tunnel for resources sharing between two branch offices. You could upgrade your ADW-4401v4 to version 1.3.9.14 and enjoy these advanced functions. Please download it from as below link.
For ADW-4401Av4
http://www.planet.com.tw/en/dl_file.php?fn=product/images/2559/FW-ADW4401Av4_13914.zip
For ADW-4401Bv4
http://www.planet.com.tw/en/dl_file.php?fn=product/images/2559/FW-ADW4401Bv4_13914.zip