I dont think its possible without hacking the ASL box. You cant mount any drives and you can't backup ASL through any of the NIC interfaces (not that I know of that is).
The config backup should backup EVERYTHING you will ever need. When I was upgrading a 2.x box to 3.2 I took the config and restored it to the 3.2 box and everything worked perfectly. I would say that it took less then 10 minutes to install ASL on the new firewall and restore the config.
the only way I know is to mirror the disk using tools like "ghost" - too much work in my opinion. If it is just to save the DHCP settings tar the directories and save the tar file on another machine.
If you have a spare disk of equal size in the ASL box, you can make a backup of the entire box to the spare disk. Bott your box on a Linux Rescue disk and issue the command dd if=/dev/hda of=/dev/hdb bs=1M (as an example). This would make a complete copy of your first physical disk to the second physical disk. If you are using SCSI disk they would bee named /dev/sda and /dev/sdb. When you need to restore the box, you boot on the rescue disk and issue the comand dd if=/dev/hdb of=/dev/hda bs=1M. This works like the ghost program, but a lot slower.
Ghost will work, but you will need a boot floppy once you put the Ghost image back on your system. The issue is with LILO. LILO remembers where your kernel image is but Ghost doesn't put it back in the same place. The trick is, how do you make a boot floppy? Good question and I for one do not know the answer, although I haven't really looked to hard for it either.
Restoring from the backup file is very quick and easy. It is actually almost quicker than Ghost, but you do lose all of your historical data. It would be nice to be able to back that up possibly.
Ghost will work, but you will need a boot floppy once you put the Ghost image back on your system. The issue is with LILO. LILO remembers where your kernel image is but Ghost doesn't put it back in the same place. The trick is, how do you make a boot floppy? Good question and I for one do not know the answer, although I haven't really looked to hard for it either.
Restoring from the backup file is very quick and easy. It is actually almost quicker than Ghost, but you do lose all of your historical data. It would be nice to be able to back that up possibly.