Here’s the basic scenario: I have a web server (let’s call it “WEB”) in a DMZ; I also have a backup server in the DMZ (“DMZBACK”) that is backing up WEB. I want to move that backup job to a backup server inside the network (“BACKUP1”).
DMZBACK is on Windows 2000; WEB and BACKUP1 are on Windows 2003 SP1.
DMZBACK and WEB both have NICs and ports forced to 100/Full, and the internal DMZ backup runs at about 200 Mb/minute.
BACKUP1, inside the trusted network, is forced 1000/Full (Gb), and the ports likewise. It averages 400-600 Mb/minute backing up resources inside the trusted network.
However, when I try to back up or do a file copy from WEB to BACKUP1, the throughput is about 25 Mb/minute. I had my WAN folks double-check the port settings on both sides, and validate that all ports are open in the firewall for BACKUP1’s IP address.
I’ve been digging online for several days, and have not come up with anything else to check. Given that xcopy takes the same amount of time as the backup, I am pretty confident that the problem is in the network rather than the backup software (Symantec Backup Exec 11D, for the record).
Any ideas and suggestions will be greatly appreciated!