# IP Passthrough in RX55 **URL:** \ **Category:** AirLink Routers\ **Created:** [June 25, 2024, 9:24pm UTC](https://forum.sierrawireless.com/t/ip-passthrough-in-rx55/32636 "2024-06-25T21:24:26Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![mike.ives](https://avatars.discourse-cdn.com/v4/letter/m/839c29/32.png) [@mike.ives](https://forum.sierrawireless.com/u/mike.ives)\ **Post date:** [June 25, 2024, 9:24pm UTC](https://forum.sierrawireless.com/t/ip-passthrough-in-rx55/32636/1 "2024-06-25T21:24:26Z")
I have been using RV50 and RV50X gateways in IP Passthrough mode to a host controller on the USB interface. The RV50 and RV50X in this mode forward the IP address assigned to the WAN interface to the USB interface. How do I configure the RX55 to operate in a similar fashion (i.e. assign the WAN IPv4 address to the host attached to the USB interface)? ---
**Author:** ![jerdung](https://avatars.discourse-cdn.com/v4/letter/j/82dd89/32.png) [@jerdung](https://forum.sierrawireless.com/u/jerdung)\ **Post date:** [June 26, 2024, 9:15am UTC](https://forum.sierrawireless.com/t/ip-passthrough-in-rx55/32636/2 "2024-06-26T09:15:03Z")
Hi @mike.ives, I understand your request, but the devices running AirLink OS only support IP Passthrough to assign the WAN IPv4 through the Ethernet interface. Thanks, ---
**Author:** ![mike.ives](https://avatars.discourse-cdn.com/v4/letter/m/839c29/32.png) [@mike.ives](https://forum.sierrawireless.com/u/mike.ives)\ **Post date:** [June 26, 2024, 2:58pm UTC](https://forum.sierrawireless.com/t/ip-passthrough-in-rx55/32636/3 "2024-06-26T14:58:34Z")
Thanks for confirming my suspicions. It is disappointing we won’t be able to use the RX55 as a drop-in replacement for the older RV50X devices. Mike ![~WRD0000.jpg](https://us1.discourse-cdn.com/flex025/uploads/sierrawireless/original/2X/5/52d5f1c08649212fe6768d2cacdcf8df711810d9.jpeg)