Sources for the Apache MINA projects are currently managed through GIT. Instructions on GIT use can be found at http://git-scm.com/book/.
Normal Git Access
Anyone can check code out of Git. You only need to specify a username and password in order to update the Git repository, and only MINA committers have the permissions to do that. We run Git over standard HTTPS, so hopefully you won't have problems with intervening firewalls.
The following is a link to the online source repository.
Cloning from the Git repo
Again, anyone can do this. Use a command like to checkout the current development version (the trunk):
read only access :
git clone http://git-wip-us.apache.org/repos/asf/mina-ftpserver.git ftpserver
write access :
git clone https://git-wip-us.apache.org/repos/asf/mina-ftpserver.git ftpserver
You will not be able to commit into the project if you are not a committer.