BUG] RustDesk server listening on IPv6 sockets, and not listening on IPv4, on Debian with no IPv6 address · rustdesk rustdesk · Discussion #7055 · GitHub
Section 12.3. IPv6 Client, IPv4 Server
tcp - RHEL (say 5.6, kernel 2.6.18-238) with dual IP address (IPv4v6) - Server Fault
Auditbeat system/socket fails to start due to IPv6 · Issue #13953 · elastic/beats · GitHub