passt - 0.0~git20250320.32f6212-1 main

passt implements a translation layer between a Layer-2 network interface and
native Layer-4 sockets (TCP, UDP, ICMP/ICMPv6 echo) on a host. It doesn't
require any capabilities or privileges, and it can be used as a simple
replacement for Slirp.
.
pasta (same binary as passt, different command) offers equivalent
functionality, for network namespaces: traffic is forwarded using a tap
interface inside the namespace, without the need to create further interfaces
on the host, hence not requiring any capabilities or privileges.