Mac not seeing server after adding second ip

November 26, 2012 at 17:25:46
Specs: Windows XP
I just had comcast business class installed. They installed a SMC d3g router. It does not support nat loopback. I had a server installed and could not browse to it inside the lan because of this issue. I was instructed that I needed to set the the servers IP to the external address and open the ports to that. That worked, and I added an internal address 10.1.10.x so that I could see it inside the firewall. The issue that I am having is that since I did this, the server can not be seen by the macs and the mac shares don;t show up for them. Any suggestions?

See More: Mac not seeing server after adding second ip

Report •


#1
November 26, 2012 at 19:54:42
Nat loopback has nothing to do with browsing a lan/server. You were given bad advice.

If you had set the servers ip to that of the external ip you would have no internet.

Your advisor is confused about port forwarding and networking in general.

The server and macs need to be on the same subnet which if left alone would have been the default.

How about starting with what OS the server is and what macs you have. Then go on to tell us what the server is meant to do. Web pages?

Answers are only as good as the information you provide.
How to properly post a question:
Sorry no tech support via PM's


Report •

#2
November 27, 2012 at 03:47:23
I am using windows advanced server 2003. We have a block of static IP addresses. I originally set the internal IP address to 10.1.10.95 and did a nat translation to it and opened the www (80) to it. I could browse to website on it no problem from outside the network. Inside, it could not find the websites. The mac shares were working fine and you could see it on the network using computer name. I called comcast tech support and said that the router does not support nat loopback, which they said routes external ip's to the internal ip's when you are in the lan. He said I could either set up a dns server or set my server ip to the external ip address for that server and go into true ip port management and open the www port for that. This is what I opted for. I changed the static ip on my server to 23.25.x.x and the gateway ip to the external ip address of the gateway. I also added a second ip address (10.1.10.5) to the nic so that I could see it on the local lan. The issue I am having now is that the macs cannot see the server and to get to the server from pc's, I need to use the 10.1.10.95 to bring it up in windows explorer. Computer names do not seem to be working. What is the proper way to configure this?

Report •

#3
November 27, 2012 at 08:04:32
Given the setup I would suggest you remove the ip entry you added and instead bring up a local dns server. This can be done on a 2003 server. You would add your web server address as a host and ptr record. Or simpler edit the hosts file and add the web server entry.

Perhaps this can help guide you
http://decoding.wordpress.com/2009/...

Answers are only as good as the information you provide.
How to properly post a question:
Sorry no tech support via PM's


Report •

Related Solutions

#4
November 27, 2012 at 09:03:00
thanks for the update. Updating the hosts file is probably not the solution as many of the pc's are laptops that are sometimes inside the lan and sometimes out. If I change the server back to a nat address and set it up also as a dns server, how do i configure the dhcp server in regards to handling the dns servers so it will include the local dns server? I have the router doing dhcp.

Report •


Ask Question