Right now I'm configuring my firewall on the local network to keep everything up before implementing it between the rest of the local network. On the WAN side I have one computer that is just for testing connectivity between the two but will become out public connection once in place of our router.
I have authentication set through Active Directory, everything is working just fine when I bring the WAN port down, but once I change the status to up, the firewall is unable to fetch Active Directory logins but can still ping my server and remote to it from another PC.
My AD server(10.10.1.112/16) and sophos(10.10.1.163/16) has a default gateway of 10.10.1.1/16 I'm not sure if that has anything to do with the problem as I cant change it for bringing down the network during production hours.
There something wrong with my NAT causing this but I cant figure out where. There isn't much support on NAT. I'm use to Cisco equipment; this is my first week on a Sophos, and first time doing NAT for a network in 4 years.
I only have one public IP I'm translating to from the local side.
When I try to configure a 1:1 NAT I can map the source just fine but get an error when trying to map a destination. SNAT and DNAT are what mess up my fetching from the AD server.
Small visio screen shot of the portion of network I'm working with.
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