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Connecting 2 remote sites via PTP T1. Unable to access one of the 2 sites networks.

I currently have 2 sites connected via a PTP T1.  The routers names are MDF-POP-NC “Cisco 2610”and MDF-PTP-SC “Cisco 2610”.  The site where MDF-POP-NC resides is filtered using a Watch Guard 700.  The Watch Guard is not equipped with a csu/dsu so the router MDF-POP-NC is at the POP.  I need both sites filtered and I do not want to route traffic through my Watch Guard from MDF-POP-NC creating double the traffic and reducing my usable bandwidth.  I have a 3rd router MDF-PTP-NC “Cisco 2611” I want to use to bring traffic into that site from MDF-PTP-SC.  So the desired route traffic would take would be MDF-PTP-SC to MDF-PTP-NC to Watch Guard to MDF-POP-NC.  Currently all traffic at the site where MDF-POP-NC resides is filtered through the Watch Guard.  I have the router MDF-PTP-NC configured and tested it this weekend.  When in place I can ping all interface addresses of MDF-PTP-SC and addresses internal to that sites network from MDF-PTP-NC.  From MDF-PTP-SC I can ping all interface addresses of MDF-PTP-NC but no internal addresses to that network.  
Here is the configuration of both routers less Login methods and passwords.
hostname MDF-PTP-SC
!
ip subnet-zero
ip host MDF-POP-NC 0.0.0.0 0.0.0.0  "Edited External address's"
ip host MDF-PTP-SC 172.16.1.1 10.10.10.2
ip host MDF-PTP-NC 192.168.1.7 10.10.10.1
!
interface Ethernet0/0
 ip address 172.16.1.1 255.255.0.0
 no ip directed-broadcast
!
interface Serial0/0
 ip address 10.10.10.2 255.255.255.252
 no ip directed-broadcast
!
ip classless
ip route 0.0.0.0 0.0.0.0 10.10.10.1
ip route 192.168.0.0 255.255.0.0 10.10.10.1
no ip http server
!
access-list 1 permit 167.58.253.0 0.0.0.255
access-list 2 permit 172.16.0.0 0.0.255.255
access-list 7 permit 0.0.0.0
access-list 50 deny   0.0.0.0
access-list 50 permit any
access-list 70 deny   10.0.0.0 0.255.255.255
access-list 70 deny   172.16.0.0 0.15.255.255
access-list 70 deny   192.168.0.0 0.0.255.255
access-list 70 permit any
access-list 80 deny   0.0.0.0
access-list 80 deny   10.0.0.0 0.255.255.255
access-list 80 deny   172.16.0.0 0.15.255.255
access-list 80 deny   192.168.0.0 0.0.255.255
access-list 80 permit any
access-list 101 deny   udp any any eq snmp
access-list 101 deny   udp any any eq snmptrap
access-list 101 permit ip any any
snmp-server engineID local 00000009020000014208EBE0
snmp-server enable traps snmp

hostname MDF-PTP-NC
!
ip subnet-zero
no ip domain-lookup
ip host MDF-POP-NC 0.0.0.0 0.0.0.0  "Edited External address's"
ip host MDF-PTP-SC 172.16.1.1 10.10.10.2
ip host MDF-PTP-NC 192.168.1.7 10.10.10.1
!
no ip bootp server
!
interface Ethernet0/0
 ip address 192.168.1.7 255.255.0.0
 no ip directed-broadcast
!
interface Serial0/0
 ip address 10.10.10.1 255.255.255.252
 no ip directed-broadcast
 no ip mroute-cache
 no fair-queue
!
interface Ethernet0/1
 no ip address
 no ip directed-broadcast
 shutdown
!
interface Serial0/1
 no ip address
 no ip directed-broadcast
 shutdown
!
ip classless
ip route 0.0.0.0 0.0.0.0 192.168.1.2  
   "192.168.1.2 = WatchGuard Firewall/Filter "forwards Traffic to Router MDF-POP-NC""
   All internet traffic at that location is filtered.

ip route 172.16.0.0 255.255.0.0 10.10.10.2
no ip http server
!
end
ASKER CERTIFIED SOLUTION
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PennGwyn

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ASKER

OK, I am not seeing how this will fix my problem.  I understand "You need PTP-NC to be the default gateway for the 192.168.x.x LAN, with ITS default route pointed at the WatchGuard".  
When I say I was issuing a ping command I mean from the router.  I was able to ping all PTP-NC interfaces from PTP-SC but nothing on the 192.168 network except interface e0/0 192.168.1.7.  
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ASKER

I appriciate any help someone can give me!  I am at a loss why I cannot ping the 192.168 network.
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ASKER

PennGwyn,

I understand what you were saying know.  That fixed the ping problem.  I had to add a network route for the 172. network into WatchGuard to get internet traffic routed to that network also.  

I have one more problem.  I cannot ping by hostname from the 172 network to the 192 network.  I need to join a Server in the 172 network to the Domain in the 192 network.  Do you have any suggestions.  After I get the server joined to the domain I should be good.  Again thanks for your responce and forgive my ignorance in the above reply.
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ASKER

I added a host name to an ip address mapping entry on my  PTP-SC router and I can ping that specific hostname from the router now.  I still cannot ping the same host name from a workstation that has its default gateway pointed to PTP-SC.  The host name I mapped is the DNS server on the 192 network.  I have the DNS Server entry on my Local Area Connection on a workstation pointed to the same DNS server that I mapped on the router and I can access the internet with no problems.