europlus :autisminf:<p><a href="https://social.europlus.zone/tags/Linux" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Linux</span></a> <a href="https://social.europlus.zone/tags/SysAdmins" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SysAdmins</span></a> <a href="https://social.europlus.zone/tags/NetworkAdmins" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>NetworkAdmins</span></a></p><p>Ubuntu 24.04 system with a publicly-routable external IP address.</p><p>For a given incoming UDP port (&lt;1024, call it port x, I can’t change this), I want to forward that to localhost (or the ens3 interface) on another port (&gt;1024, port y) so I can invoke QEMU as non-root and forward port y to the emulated system’s port x via slirp.</p><p>Is this doable?</p><p>I’ve tried heaps of nat prerouted examples, but haven’t yet gotten anything to stick.</p><p>Boosts appreciated!</p><p><a href="https://social.europlus.zone/tags/IPTables" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>IPTables</span></a></p>