On SGOS software V6 and V5.5, the ProxySG Appliance supports 30 DNS suffixes information in inside.
For SGOS V5.4 and earlier versions, the maximum DNS suffixes was 6.
Adding a DNS suffix to your ProxySG Appliance
Access the ProxySG Management Console, select Configuration > Network > DNS > Imputing
Execute the following command in the CLI: