How to use the IPv4-to-IPv6-Proxy » History » Revision 9

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Timothée Floure, 02/20/2020 02:48 PM
Emphasize on *receive* for SMTP service

How to use the IPv4-to-IPv6-Proxy

This document contains user documentation. See Common operations on IPv4-to-IPv6-Proxy for staff operations.


This document is IN PRODUCTION.


To enable IPv6 only VMs to be accessible from the IPv4 Internet, we have an IPv4-to-IPv6 proxy.

HTTP proxying

  • Configure / setup your website to be reachable by IPv6
  • Ensure that your domain name has an AAAA entry pointing to your website
  • Inform the ungleich team via support at about your domain
  • Our team will setup the proxy to whitelist your domain
  • Setup an A entry for your domain(s) pointing to

SMTP proxying (experimental)

This service allows you to receive emails from the IPv4-world on an IPv6-only node.

  • Configure / setup your mail server to be reachable by IPv6.
  • Inform the ungleich team via support at about: your domain name (e.g. domain.tld for ) and the address of your mail server (e.g. my-sexy-ipv6only-vm.domain.tld).
  • Our team configure the proxy for your domain and come back to you.
  • Add a MX DNS record pointing to (e.g. domain.tld IN MX 10

Updated by Timothée Floure over 4 years ago · 9 revisions