TomDLux mentioned ssh which is a great option. In particular you can use the scp program to copy files over ssh, or even use rsync over ssh. The ssh protocol solves the problem of deciding who to trust and it also encrypts your data transfer which can be a handy benefit. These programs tend to be pre-installed on modern Unix variants, or you can check out openssh.

Unfortunately, I suspect you are on Windows since you used the term "folders". There seem to be ssh servers for Windows, but you'll have to ask others for recommendations on which one to use.

Since the boxes you want to transfer the files from are in a DMZ, you will want to make sure you use an ssh connection from a trusted box to the DMZ boxes, even though the data transfer is going in the other way.

It's ok for your DMZ box to trust your protected identity on a secure box, but it's not good for your internal box to trust the identity of an account on a box that is in danger of being compromized.

Since you talk about getting "special privileges", it's not guaranteed that you'll be able to set up or connect to an ssh server. It sounds like you may need to talk to your network or sys admins and find out what they recommend for the data transfer.

Other options include running a web server on each DMZ box and downloading the log files using the standard HTTP protocol. It could even be encrypted using SSL, but make sure that you configure the web server to not allow access from untrusted systems or you'll be publishing your private data to the world.

If you want more help, you'll probably need to provide more details on your operating systems, network structure, protocols available, etc.

-- Eric Hammond