Specifications

Trend Micro™ InterScan™ Gateway Security Appliance M-Series Deployment Guide
3-18
Deployment Issues
This release has the following limitations:
• VLAN is not supported in either transparent or fully transparent proxy mode.
Some network devices use VLAN to separate network layers. This use causes
modified VLAN tags. The appliance cannot recognize VLAN tags. If deployed in
a VLAN environment, the appliance is unable to scan any of the four protocols,
and the Web console is inaccessible.
WARNING! If the appliance is deployed in a VLAN environment, the LCM LEDs are
unable to provide any indication that scanning is not working.
• MAC address transparency is not supported in any operation mode.
• Original bridge forwarding processing may be disturbed in both operation
modes. See
Deployment Issues on page 3-18.
• If the link is broken on the external (Internet-facing) side of the appliance, the
appliance cannot alert network devices on the external side. Likewise, if the
broken link is on the internal side, the appliance cannot alert devices on that side.
• Packet looping may occur if packets pass through a proxy server before the
appliance.
FIGURE 3-12. If the proxy server is deployed on the protected-network side
of the appliance, packet looping may occur
Client
Proxy server
Router
Internet
Error