Bug#805344: systemd: ListenStream=6566 in saned.socket only causes systemd to listen on [::]:6566

Did you check if it is actually not reachable over IPv4? IPv6 sockets can also accept IPv4 connections unless configured not to do so. This is controlled system-wide via /proc/sys/net/ipv6/bindv6only which is "0" on my computer (which is the default according to man:systemd.socket(5)). And

Bug#805344: systemd: ListenStream=6566 in saned.socket only causes systemd to listen on [::]:6566

I was trying to run sane network scanning through socket activation, but with the provided saned.socket file systemd only listens on a v6 socket. I have to explicitly change ListenStream to 0.0.0.0:6656 to make it listen on v4. Did you check if it is actually not reachable over IPv4? IPv6

Bug#805344: systemd: ListenStream=6566 in saned.socket only causes systemd to listen on [::]:6566

Jens Georg writes: > I was trying to run sane network scanning through socket activation, but > with the provided saned.socket file systemd only listens on a v6 socket. > I have to explicitly change ListenStream to 0.0.0.0:6656 to make it > listen on v4. Did you check if