A. Here are some old examples (previous zywall series) that demonstrate that the zyxel ipsec is straightforward you can skip these and move down to B.
»Cisco Forum FAQ
»How do I configure a Zywall/PIX IPSec VPN
»www.zyxeltech.de/SNoteZW5_362/ap ··· isco.htm
»www.zyxeltech.de/snotezw5_362/ap ··· w_zw.htm
B. For the newer USG lineup, more object oriented the following applies - first a USG to USG connection, seems decent!
»www.zyxel.se/upload/doc/support/ ··· Site.pdf
This original support note for the USG detailed setups between zywalls as previoius link BUT also has setups with fortigate, netscreen and sonicwall, suggest this may help.
://ftp.zyxel.com/ZYWALL_USG_100/sup ··· 1.00.pdf
This latest support note addresses an easy way for a remote client to connect to the branch zyxel unit (last item scroll down to the end)
://ftp.zyxel.com/ZYWALL_USG_100/sup ··· 3.00.pdf
there is one support note in between that touched upon SSL connections and IPSEC VPN high availablity.--
Ain't nuthin but the blues! "Albert Collins".
Leave your troubles at the door! "Pepe Peregil" De Sevilla. Just Don't Wifi without WPA, "Yul Brenner"