Binding to both IPv4 and IPv6 address about endlessh HOT 9 CLOSED

This should now be resolved by #20. Thanks, @Inrin!

from endlessh.

Yes, the same, only tcp6

# netstat -an | grep 2222
tcp6       0      0 *.2222                 *.*                    LISTEN

from endlessh.

from endlessh.

I run it on VM esxi on fresh FreeBSD11.2. So, what i must do?

from endlessh.

This is affecting me as well on a fresh Ubuntu 16 install. Once this issue is solved I'd love to run this.

from endlessh.

This has to do with IPv4 mapped IPv6 address communication.
Linux defaults to allow this, whereas FreeBSD defaults to not allow this and defaults to IPv6Only.

To allow this under Linux use:

sysctl -w net.ipv6.bindv6only=0

To make it permanent safe it in a `/etc/sysctl.d/40-ipv6only.conf

net.ipv6.bindv6only = 0

For FreeBSD:
Add:

ipv6_ipv4mapping="YES"

to your /etc/rc.conf

Maybe I'll get the time to make an PR to include -4 -6 command switches.

PS:
@PyRo1509
Why do you use Ubuntu 16.XX in 2019?

Sources:
https://www.freebsd.org/doc/handbook/network-ipv6.html
http://man7.org/linux/man-pages/man7/ipv6.7.html

from endlessh.

Why do you use Ubuntu 16.XX in 2019?

You use what that your VPS provider provides.

from endlessh.

@Inrin Thanks for the info. I tried setting ipv6_ipv4mapping="YES" in my jail, but that does not have any effect. I would probably have to set it on the the host - but I am not going to do this on a production server with several other jails.

from endlessh.

@utrenkner
Good to know! I couldn't test it myself as currrently I have no *BSD setup running.
I found https://superuser.com/questions/903308/forcing-bsd-to-accept-both-ipv4-and-ipv6-traffic-on-a-single-socket/999182, which doesn't sound promising.

I'm currently testing adding -4 -6 switches and default to IPv4 mapped IPv6.
According to https://www.freebsd.org/cgi/man.cgi?query=ip6&apropos=0&sektion=0&manpath=FreeBSD+12.0-RELEASE+and+Ports&arch=default&format=html FreeBSD also has the option, so it sounds promising. (Need to spawn an FreeBSD instance for testing though)

from endlessh.