We've recently set up a Windows 2003 server, but cannot figure out why it is completely unreachable from outside of our local network, and I can assure that it is not a firewall issue.
The line from our ISP leads into a switch, that connects to our servers (the win2k3 server, a winnt 4.0 server, and several linux servers), as well as a router with a hardware firewall. the router then connects to several workstations. here is a (very simplified) diagram of the network
We don't have a centralized network, rather we have several servers with static IPs, all of which are multipurpose (many act as HTTP servers). Our DNS servers (64.xxx.xxx.01, 66.xxx.xxx.01) are both local linux machines (the second is a backup DNS).
The win2k3 server is set to a STATIC ip (64.xxx.xxx.04), and has a DNS address (2k3.xxxx.com). The built-in windows firewall is disabled, as is ICS (internet connection sharing). The DNS address for this server DOES resolve to the correct numeric IP.
Any attempt to access this computer from our network (ie: from the workstations behind the firewalled router, or from any of the other servers) works flawlessly, but any attempt from outside the local network fails. The IP gets no response, it's as if the machine were off.
It can't be a firewall issue because there is no firewall between these servers and the internet (normally not a good idea, but this is a unique setup), and the rest of the servers are accessible (including a few linux servers & an older WinNT 4.0 server).
So the problem has to be with the Win2003 OS, but again, the windows firewall IS disabled. It has to be something else in the server's configuration. Its network connection TCP/IP configuration is as follows:
[ul square][li]Use the following IP address[/li]
[ul circle][li]IP address: 64.xxx.xxx.04[/li]
[li]Subnet mask: 255.0.0.0[/li]
[li]Default gateway: [/li][/ul]
[li]Use the following DNS server addresses[/li]
[ul circle][li]Preferred DNS server: 64.xxx.xxx.01[/li]
[li]Alternate DNS server: 66.xxx.xxx.01[/li][/ul][/ul]
We are at a loss, and would appreciate ANY help we can get.
The line from our ISP leads into a switch, that connects to our servers (the win2k3 server, a winnt 4.0 server, and several linux servers), as well as a router with a hardware firewall. the router then connects to several workstations. here is a (very simplified) diagram of the network
We don't have a centralized network, rather we have several servers with static IPs, all of which are multipurpose (many act as HTTP servers). Our DNS servers (64.xxx.xxx.01, 66.xxx.xxx.01) are both local linux machines (the second is a backup DNS).
The win2k3 server is set to a STATIC ip (64.xxx.xxx.04), and has a DNS address (2k3.xxxx.com). The built-in windows firewall is disabled, as is ICS (internet connection sharing). The DNS address for this server DOES resolve to the correct numeric IP.
Any attempt to access this computer from our network (ie: from the workstations behind the firewalled router, or from any of the other servers) works flawlessly, but any attempt from outside the local network fails. The IP gets no response, it's as if the machine were off.
It can't be a firewall issue because there is no firewall between these servers and the internet (normally not a good idea, but this is a unique setup), and the rest of the servers are accessible (including a few linux servers & an older WinNT 4.0 server).
So the problem has to be with the Win2003 OS, but again, the windows firewall IS disabled. It has to be something else in the server's configuration. Its network connection TCP/IP configuration is as follows:
[ul square][li]Use the following IP address[/li]
[ul circle][li]IP address: 64.xxx.xxx.04[/li]
[li]Subnet mask: 255.0.0.0[/li]
[li]Default gateway: [/li][/ul]
[li]Use the following DNS server addresses[/li]
[ul circle][li]Preferred DNS server: 64.xxx.xxx.01[/li]
[li]Alternate DNS server: 66.xxx.xxx.01[/li][/ul][/ul]
We are at a loss, and would appreciate ANY help we can get.
