The PIX has three interfaces outside, inside and dmz.
There is an exchange mail server in the dmz area. Its IP add is 192.168.1.10. And it is natted to an outside address like 184.108.40.206 for example. At the beginning, everything is working fine. But after some time, the mail server will not be able to access the internet. I use my computer to connect to the internet directly using the 220.127.116.11, the link is fine and I can access the internet. After changing the outside nat address to 18.104.22.168, the mail server is working again.
Can anyone give me a clue? I'm really frustrated about this problem.
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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...