our organization is using ASA 5520 as firewall.The inside interface of the firewall is on core switch and the default route on core switch is pointing towards the inside interface of the firewall.There are several vlans on core switch and the routing is done on the firewall for the vlans. Users under vlan use a proxy server to access the internet.Some of the users are using static NAT outside to have internet without the proxy.
Our e-mail server is sitting in DMZ .The NATED users are not able to access the mail server through outlook.If the vlan is not NATED no issues.Looking for a solution.
It is not an Exchange server but sun mail server sitting at DMZ. We have numerous vlans inside .like 192.168.2.0, 192.168.3.0 etc. mail server sitting in dmz with an ip 192.168.1.2 for example. Local dns cannot reslove to public. url used to configure outlook points towards the local ip. suppose one vlan is nated with a public ip to get internet without using proxy that particular vlan is not able to access the mail server via out look though the server can be be telneted at at port 25.
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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...