I've attached the configurations of each firewall.
Please note however one firewall has a public ip address on the outside interface, whereas the other has a private ip address, translated from the ISP's router to 126.96.36.199. (In the previous post i wrote both were with a public ip address)
We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
In Syslog I also se...