Can't Remote connection by IpV6

Hi everyone, is it possible to remote connect through IpV6? IpV4 works fine but I cant connect through V6

postgresql.conf is to listen all address and pg_hba.conf is set with host all all :: md5 i've tried ::/0 and ::0/0 but had no success

my provider is out of ipv4 and they're sending ips by cgnat if I want a public ipv4 I have to sign a very expensive service fee 

thanks a lot