L2 Transparent: ALGs

Avaya H.323, G-H323, IKE, MGCP, MSRPC, PPTP, RSH, SUN RPC, SCCP, SIP, SQL, and TALK ALGs support Layer 2 transparent mode. Transparent mode on SRX Series devices provides standard Layer 2 switching capabilities and full security services. In transparent mode, the SRX Series device filters packets that traverse the device without modifying any of the source or destination information in the packet MAC headers. Transparent mode is useful for protecting servers that mainly receive traffic from untrusted sources because there is no need to reconfigure the IP settings of routers or protected servers. A device operates in Layer 2 transparent mode when all physical interfaces on the device are configured as Layer 2 interfaces. There is no command to define or enable transparent mode on the device. The device operates in transparent mode when there are interfaces defined as Layer 2 interfaces. The device operates in route mode (the default mode) if there are no physical interfaces configured as Layer 2 interfaces.