Tag Archives: transparent mode

SRX Transparent Mode

SRX can also function as a firewall device when it is in layer 2 mode i.e
it can perform firewall functionality transparently.

As of now there are certain limitations on transparent mode. If not changed already;

  • You can either run the firewall in route mode or transparent mode but not mixed
  • NAT and IPSEC aren’t supported in this mode

Below I will try to show how you can convert an SRX firewall to transparent mode
and configure it. In our topology, we have two Linux servers each in the same VLAN
(282) and we will inspect traffic between these nodes without those Linux hosts are
being aware of SRX

transparent_mode_srx

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