Re: IPFW/IPv6 problem with JAIL: JAIL cannot ping -6 host until host first pings jail (ipv6)

> On Jan 8, 2024, at 1:50 AM, FreeBSD User <freebsd@walstatt-de.de> wrote:
> 
> Hello,
> 
> I've got a problem with recent CURRENT, running vnet JAILs.
> FreeBSD 15.0-CURRENT #28 main-n267432-e5b33e6eef7: Sun Jan  7 13:18:15 CET 2024 amd64
> 
> Main Host has IPFW configured and is open for services like OpenLDAP on UDP/TCP and ICMP
> (ipfw is configured via rc.conf in this case, host is listening on both protocol families
> IPv4 and IPv6). 
> 
> The host itself has openldap-server 2.6 as a service. The host's interface is igb0 with
> assigned ULA. JAILs (around eight jails) are sharing their vnet interfaces via a bridge with
> the same physical device as the host (igb0). After a while (the time elapsed is unspecific)

How did you create your jails , are they vnet jails ? 

Is that bridge + epair ?

> the jail is unable to contact the host via IPv6: neither UDP, TCP nor ICMP sent from the JAIL
> is reaching the host. IPv4 is working like a charme! No problems there.
> 
> When pinging the Jail from the main host via ping -6, the jail is responding! After the first
> ping -6, the jail now is able to ping -6 the main host.
> 
> After a fresh reboot, the problem is not present and occurs after a while and it seems to
> happen first to very active jails.
> 
> Kind regards,
> 
> oh
> 
> 
> -- 
> O. Hartmann
> 

Best regards,
Zhenlei