Problem with routing - Need help

Hello,
I need a little direction with what I think is a routing problem. Any help will be appreciated. My setup is as follows:
Cable Modem
27.177.21.9
WAN - Gi0/0
27.177.21.10
Cisco 2901
LAN - Gi0/1
192.168.1.250
Client
192.168.1.10
The Problem
Router can ping LAN interface
Router cannot ping WAN interface -X
Router can ping Cable Modem
Client
Client can ping LAN interface
Client can ping WAN interface
Client cannot ping Cable Modem -X
Here is my routing table:
Gateway of last resort is 27.177.21.9 to network 0.0.0.0 (this is my cable modem)
S*    0.0.0.0/0 [1/0] via 27.177.21.9
                is directly connected, GigabitEthernet0/0
      27.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C        27.177.21.8/30 is directly connected, GigabitEthernet0/0
L        27.177.21.10/32 is directly connected, GigabitEthernet0/0
      192.168.1.0/24 is variably subnetted, 2 subnets, 2 masks
C        192.168.1.0/24 is directly connected, GigabitEthernet0/1
L        192.168.1.250/32 is directly connected, GigabitEthernet0/1
Here is a portion of my configuration:
interface GigabitEthernet0/0
 description Cable Internet$FW_OUTSIDE$$ETH-WAN$
 ip address 27.177.21.10 255.255.255.252
 zone-member security out-zone
 duplex auto
 speed auto
interface GigabitEthernet0/1
 description hbc_staff$FW_INSIDE$$ETH-LAN$
 ip address 192.168.1.250 255.255.255.0
 zone-member security in-zone
 duplex auto
 speed auto
 no mop enabled
ip default-gateway 27.177.21.9
ip forward-protocol nd
ip http server
ip http access-class 23
ip http authentication local
ip http secure-server
ip http timeout-policy idle 600 life 86400 requests 10000
ip route 0.0.0.0 0.0.0.0 27.177.21.9
ip route 192.168.1.0 255.255.255.0 27.177.21.9
 Thanks in advance

Hello Jon,
I continue to try different configurations to get my router to connect without success. I am now trying NAT and this is where we stand now. Any help will be much appreciated.
The problem
Router now pings everything by ip address or name
Client PC from inside the LAN cannot ping modem or Internet
Relevant parts of configuration:
ip domain name mydomain.org
ip name-server 24.247.15.53
ip name-server 66.189.0.100
interface GigabitEthernet0/0
 description Internet$FW_OUTSIDE$ETH-WAN$
 ip address 27.177.21.10 255.255.255.252
 ip nat outside
 ip virtual-reassembly in
 duplex auto
 speed auto
interface GigabitEthernet0/1
 description hbc_staff$FW_INSIDE$$ETH-LAN$
 ip address 192.168.1.250 255.255.255.0
 ip nat inside
 ip virtual-reassembly in
 zone-member security in-zone
 duplex auto
 speed auto
 no mop enabled
ip nat pool HBC-I 27.177.21.10 27.177.21.10 prefix-length 24
ip nat inside source list 7 pool HBC-I overload
ip route 0.0.0.0 0.0.0.0 27.177.21.9
ip route 192.168.1.0 255.255.255.0 GigabitEthernet0/1
access-list 7 permit 192.168.1.0 0.0.0.255
#show ip route
Gateway of last resort is 27.177.21.9 to network 0.0.0.0
S*    0.0.0.0/0 [1/0] via 27.177.21.9
      27.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C        27.177.21.8/30 is directly connected, GigabitEthernet0/0
L        27.177.21.10/32 is directly connected, GigabitEthernet0/0
      192.168.1.0/24 is variably subnetted, 2 subnets, 2 masks
C        192.168.1.0/24 is directly connected, GigabitEthernet0/1
L        192.168.1.250/32 is directly connected, GigabitEthernet0/1
When pinging the modem from a client inside the LAN this is what I get from NAT translations and statistics:
#sho ip nat translations ver
Pro Inside global         Inside local          Outside local         Outside global
icmp 27.177.21.10:40709   192.168.1.8:40709     27.177.21.9:40709     27.177.21.9:40709
    create 00:00:05, use 00:00:00 timeout:60000, left 00:00:59, Map-Id(In): 1, 
    flags: 
extended, use_count: 0, entry-id: 4, lc_entries: 0
#sho ip nat statistics
Total active translations: 2 (0 static, 2 dynamic; 2 extended)
Peak translations: 2, occurred 00:00:04 ago
Outside interfaces:
  GigabitEthernet0/0
Inside interfaces: 
  GigabitEthernet0/1
Hits: 104  Misses: 0
CEF Translated packets: 104, CEF Punted packets: 0
Expired translations: 7
Dynamic mappings:
-- Inside Source
[Id: 1] access-list 7 pool HBC-I refcount 2
 pool HBC-I: netmask 255.255.255.0
    start 27.177.21.10 end 27.177.21.10
    type generic, total addresses 1, allocated 1 (100%), misses 0
Total doors: 0
Appl doors: 0
Normal doors: 0
Queued Packets: 0

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