# ACME Proxy Service

ACMEv2 Adapter relying on true-Xtender Registration Authority

# Introduction

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# true-xtender ACME Proxy Service
ACMEv2 Adapter (RFC 8555)
## Features
- Supports ACMEv2 protocol
- http-01 and dns-01 challenge validation and External Account Binding (EAB)
- Integrated in Registration Authority
- Support multiple certificate profiles
- Validation is performed by the proxy server

![](/uploads/images/gallery/2026-07/97sf592dafd448f2457bbf0779b83e9f8bca39831ed-intro1.png)



- Use the same proxy to enroll certificates from different CAs

![](/uploads/images/gallery/2026-07/NG4f592dafd448f2457bbf0779b83e9f8bca39831ed-intro3.png)


## Connectivity Scheme
typical port usage
- ACME service access
  - on 21443 (MUST if ACME Proxy hosted on RA Server)
  - on 443 or any custom port
- HTTP validation on 80, 443 or any custom port

![](/uploads/images/gallery/2026-07/cIbf592dafd448f2457bbf0779b83e9f8bca39831ed-intro2.png)