Hello.
I spend already several days to find the root cause and to fix this problem.
I find out, that the resolv.conf does not contain the default IP4 gateway as the main FreeNAS installation.
The content of the resolv.conf is
# Generated by resolvconf
nameserver fd00::ca0e:14ff:xxxx:xxxx
(xxxx is just my manual masking).
If I replace this by my default Ip4 gateway, then the access to internet works.
But it will be overwritten, if the jail is restarted.
I spend already several days to find the root cause and to fix this problem.
I find out, that the resolv.conf does not contain the default IP4 gateway as the main FreeNAS installation.
The content of the resolv.conf is
# Generated by resolvconf
nameserver fd00::ca0e:14ff:xxxx:xxxx
(xxxx is just my manual masking).
If I replace this by my default Ip4 gateway, then the access to internet works.
But it will be overwritten, if the jail is restarted.