Installation guide

Trend Micro™ InterScan™ Web Security Virtual Appliance 6.5 Installation Guide
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To configure FTP clients to use this flow:
• Set the IWSVA server as a FTP proxy
• Set the username to be
username@targetftp-server , instead of the normal
username
Note: IWSVA FTP works with most firewalls, usually requiring only a modification to the
firewall to open a port for the FTP proxy.
FTP requests follow this sequence:
1. The FTP client sends a request to the IWSVA FTP service.
2. The IWSVA FTP service validates the request (for example, the file type is not
blocked). If the request is valid, the IWSVA FTP service attempts to connect to the
appropriate FTP server on the Internet. If the connection succeeds, the IWSVA
FTP service sends the request to the target FTP server.
3. The FTP server on the Internet responds to the request, ideally with the requested
file.
4. The IWSVA FTP service scans the returned data for unwanted content. If it finds
any unwanted content, it returns an appropriate message to the FTP client.
Otherwise, it returns the requested data to the FTP client.