Device backup manager in Director will back up ProxySG appliance configuration settings except those listed below.
1. Any show configuration command that begins with the following string is not included in the backup:
b. interface (the entire submode)
c. line-vty (the entire submode)
2. Director does not backup any of the following ProxySG features:
a. Content filtering database (although passwords are backed up)
b. Access logs
c. Event log
e. Private key and certificate, unless they were configured using the show keypair command
f. The SGOS image itself
Hence, the ProxySG configuration will not restore any interface setting to ProxySG as the director does not backup this setting at the first place.