We have ISA Server 2006 protecting my internal network. Recently, we decided to setup VPN clients connections to allow developers put/get files from 4 Linux servers which have FTP service configured and started.
FTP Server are only available on internal network. FTP are configured to use anonymous authentication.
When developers team are on the office, they can get and put filer on the FTP servers. When they are connected in VPN trought Internet (ISA Server 2006), they can get files, but they cannot put files on the FTP directories.
I check logs and monitoring sessions in ISA Server but I don't see any event that shown nothing abnormal on the ISA Server settings.