search for: nonlocal_bind

...be complete until at least one IP is on any interface. If it's your own application and you can set the flags on the actual bind then you can use so_freebind on the socket opened, some applications may have this as a compile time or configurable option. Another option is to enable net.ipv4.ip_nonlocal_bind and net.ipv6.ip_nonlocal_bind which allows the kernel to bind a socket on an IP it doesn't have (do note the caveat it may break some things). https://www.kernel.org/doc/Documentation/networking/ip-sysctl.txt If it's a systemd socket being used by the service then you can enable the freeb...