ZyXEL Communications 2WG - Manual (Page 172)

ZyWALL 2WG Support Notes
All contents copyright (c) 2006 ZyXEL Communications Corporation.
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29. If you have already done the previous settings, you should see a remote gateway here. Select the
gateway, and then press OK button.
30. On VPN Properties settings, select Encryption Algorithm to DES, Authentication Algorithm to
MD5 on phase 1, and also select Encryption Algorithm to DES, Authentication Algorithm to SHA1
on phase 2.