I will re-post this here from another thread. It may or may not help you but....
"To briefly or not so briefly sum up what it took for me to setup the ACIII pro on my network:
1.
acIII pro settings:
ip address: 192.168.1.50
netmask: 255.255.255.0
gateway address: your routers IP address for me it was192.168.1.1
primary dns: same as routers ip 192.168.1.1
alt DNS same again 192.168.1.1
(these settings may be different for your system)
2. If you have a dynamic IP (PM if you dont know what this means) then set up account at
www.dyndns.com and add dynamic dns to your services. you will have to pick a name: for me it was reefstatus.kicks-***.net (the last part is chosen from a dropdown menu) Make sure there are no profanities in there or you will get *** on RC if you need help
3. I also am running the software from the below link to update my dynamic ip address (or else it will not work once your dynamic IP address is changed..
https://www.dyndns.org/support/clients/dyndns.html
(pm for more info if needed)(my wife actually installed this software so I will have to ask her)
3.(enter configuration by putting in your routers IP adress for me it was 192.168.1.1 in your web browsers address box) configure your router for port forwarding to your ACIII pro local ip address ie :192.168.1.50. This was the PITA for me. Web servers typically run on port 80 so you would forward port 80 inbound requests to your ACIII pro. Well here began the problem. Many ISP's (mine is Cox cable) block inbound port 80 for residential access( they did this initially due to worms, but now it is more like another way to get you to upgrade your services to a business level service ie: more money). However, there is a way around this. on my url:
http://reefstatus.kicks-***.net:6000/ there is a ':6000' attached to the address. This signals the address to go to your ip address and then look at port 6000. From there you need to get it back to port 80 (needed for ACIII pro to send and recieve signals. This was the second major issue I had. Not all routers will let you do this and it is not always obvious. I ended up updating the 'firmware' on my router (per linksys tech assist advice after multiple attempts to get it to work with no success). I then made router listen externally on port 6000 and then send this info on port 80 under the tab : forwarding and subtab UPnP forwarding. Here is a blirb from this section:
UPnP Forwarding
UPnP Forwarding can be used to set up public services on your network. When users from the Internet make certain requests on your network, the Router can forward those requests to computers equipped to handle the requests. If, for example, you set the port number 80 (HTTP) to be forwarded to IP Address 192.168.1.2, then all HTTP requests from outside users will be forwarded to 192.168.1.2."
4. I was also told by linksys that I needed to enable logging. (I felt this was suspect but it cant hurt and is enabled on my router so do this if you can. For me it was under the admin tab on the router setup and you just had to click enable.
5. If it still isnt working go back and verify everything you have done (I swear things change on there own sometimes ! ).
viola after three days in the hands of a network fumbling idiot it seems to be working
PM me if you want to be confused some more
