Trouble connecting to 2008R2 machine on local network

I'm having troubles connecting two machines on my network, and need some help from the Experts!

My local machine is a new Windows 10 box (but I had exactly the same issue when it was a Win7 box). The machine I'm trying to connect to is a Server 2008R2 box.

I have a Comcast Business router, and I've connected that to a Cisco RSV4000 router/firewall ONLY.  I have several machines connected to that router, and I also have a Cisco /Linksys E4200 wireless router connected to one of those ports. The RSV4000 has DHCP enabled, and the E4200 has DCHP disabled.

From my local machine, I can run arp -a, and I see the address of the 2008 box, and I can ping it. The machine does not show up in my "Network" view. I see several other machines, and I can see the E4200, and I can see machines connected to the E4200. I can also see several printers connected to the RVS4000 Router - but I can't see the 2008 box.

From the 2008 box, I can run arp -a and I see the address of my Win10 box, but it does not respond to pings.

From EITHER box, I cannot see the other machine.

How can I get these machines to talk?

Note the 2008 box is being used for File Services, HyperV, RDS (and license server) and nothing else.
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Scott McDaniel (Microsoft Access MVP - EE MVE )Infotrakker SoftwareAsked:
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Sys_Admin1Commented:
2 things I think are happening.  The computer browser service is disabled on server machines by default.  Enable that.  Then, I think you probably have a firewall setting preventing the ping to the win 10 machine.
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Scott McDaniel (Microsoft Access MVP - EE MVE )Infotrakker SoftwareAuthor Commented:
I enabled the Computer Browser service on the server, and made sure it started. The Win10 box still doesn't see that machine.

I created a firewall rule on the Win10 box to allow ICMP4 traffic. I allowed protocal ICMPv4 for Any IP Address for any Program for Domain and Private profiles. I still cannot ping the Win10 box from the 2008 box.

I also temporarily turned the firewall off on the Win10 box, and still could not ping from the 2008 box.
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David Johnson, CD, MVPOwnerCommented:
the problem is that local addresses ranges are not routable.

your probable configuration is

WAN - wanport RSV4000 - lan port  x -> wan port of e4200 (lanport) <--> your machine what you need is a switch not a router therefor
WAN -> RVS4000 - > lan port of e4200 <> your machine.
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Sys_Admin1Commented:
I thought this too.  I 'assumed' that everything was connected on the LAN side as a switch.  Meaning, all the LAN side was plugged into the LAN ports on each of the devices.  There should only be one router device acting as a router to the internet.

Confirm if that is how it is connected.
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Scott McDaniel (Microsoft Access MVP - EE MVE )Infotrakker SoftwareAuthor Commented:
My WAN comes into my Comcast Business router. From there, I connect to the WAN (Internet??) port on my RVS4000. There are several machines and printers connected to the other ethernet ports on the RVS4000, including my machine and the 2008 box that I cannot see.

There is no cable in the E4200's WAN port. The E4200 is connected to one of the LAN ports on the RVS4000. There are a few printers connected to the E4200 LAN ports, and I can see and use those printers from my machine. There are also two laptops connected via wireless to the E4200, and I can see both of those (as well as a Roku player, phones, etc). All of those I can see and interact with.

So it goes:

WAN >> Comcast Router >> RVS4000 WAN Port >> E4200 through standard LAN ports (on both)

All of my machines are in the same "segment", if I understand what that means - they all have addresses in the 192.168.1.100 thru 192.168.1.150 range, all with a subnet of 255.255.255.0.
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Scott McDaniel (Microsoft Access MVP - EE MVE )Infotrakker SoftwareAuthor Commented:
Looks like my 2008R2 server was not properly setup. I discovered this when I went to Network and Sharing Center - Change Advanced Sharing Settings, and could NOT turn on Network Discovery in that section. I could click the radio button, but could not "save" those changes - i.e. if I selected to turn ON Network Discovery, and then closed-reopened the settings, the setting had turned back off.

I finally discovered that I had to turn on several services on the 2008R2 machine to make it discoverable:

DNSCache (DNS Client Service)
FDRESPUB (Function Discovery Resource Publication Service)
SSDPSRV (SSDP Discovery Service)
UPNNPHOST (UPnP Device Host Service)

I also checked the Firewall settings to be sure the Network Discover exception was enabled. Soon as I turned those services on, I can see the 2008 box from my Win10 box, and can navigate drives, save files, etc etc.

I've set those Services listed above to Automatic (several of them were Disabled). Hopefully this is the correct thing to do.
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Scott McDaniel (Microsoft Access MVP - EE MVE )Infotrakker SoftwareAuthor Commented:
My Server 2008R2 wasn't setup correctly, per my earlier comment. I did make changes to my network per the Expert comments, which I believe were part of the trouble.

Thanks very much for your time and expertise!!
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