---
title: "Allow hosts to access an NVMeoF subsystem"
method: POST
path: "/api/nvmeof/subsystem/{nqn}/host"
tags: ["NVMe-oF Subsystem Host Allowlist"]
---

# Allow hosts to access an NVMeoF subsystem

`POST /api/nvmeof/subsystem/{nqn}/host`

## Path parameters

- `nqn` string, required

## Request body

- object
  - `dhchap_controller_key` string
  - `dhchap_key` string
  - `gw_group` string — NVMeoF gateway group
  - `host_nqn` string, required — NVMeoF host NQN. Use "*" to allow any host.
  - `psk` string
  - `server_address` string — NVMeoF gateway address
  - `traddr` string — NVMeoF gateway address (deprecated)

## Response `201`

Resource created.

- object

## Other responses

- `202` — Operation is still executing. Please check the task queue.
- `400` — Operation exception. Please check the response body for details.
- `401` — Unauthenticated access. Please login first.
- `403` — Unauthorized access. Please check your permissions.
- `500` — Unexpected error. Please check the response body for the stack trace.

## Changes

- **2026-04-21** `5dcf576ae411` — 1 info
  - added the new optional request property `traddr`
- **2026-04-13** `a35a27a6a408` — 1 warning
  - removed the request property `traddr`
- **2026-04-12** `a22268946bcf` — 1 info
  - added the new optional request property `traddr`
- **2026-03-31** `9cf6ecad921e` — 1 warning
  - removed the request property `traddr`
- **2026-03-27** `5824065b0830` — 1 info
  - added the new optional request property `traddr`

[Full history](https://skmtc.dev/ceph/apis/ceph-rest-api/changes/api/nvmeof/subsystem/:nqn/host/post.md)

---

[API](https://skmtc.dev/ceph/apis/ceph-rest-api.md) · [All operations](https://skmtc.dev/ceph/apis/ceph-rest-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/ceph/ceph-rest-api/revisions/474e652a8dce/schema)