Passt – Plug a Simple Socket Transport

"Passt" and "Pasta" are tools that provide a translation layer between network interfaces and Layer-4 sockets without requiring special privileges, serving as replacements for Slirp. Passt focuses on pretending processes are running locally, while Pasta enables connecting namespaces without creating additional interfaces. Both tools support TCP, UDP, and ICMP/ICMPv6 echo protocols. They offer features like ARP proxy, DHCP server, and NDP proxy, with minimalistic implementations. Users can build from source or use available packages to run these tools. Continuous integration, performance, and security features are also highlighted.