Background: I am setting up a network for a local church I attend. The setup will be:
Currently ATT DSL --> Motorola 3801HGV set in transparent (bridging) mode -->outside interface of ASA5506 (configured for DHCP from DSL modem) -->Inside interface of 5506 (172.16.0.2 IP) --> routed interface on Cisco 3750 (Gi1/0/3).
The 3750 has 3 private networks. All networks can talk to each other without issue. All networks can ping the 172.16.0.2 IP (inside interface of ASA5506). Those three private networks are:
10.1.1.0/24 10.1.2.0/24 10.1.3.0/24
Note: I have single area OSPF running on the 3750 that performs my routing. I have default information originate configured there as well.
I currently have NAT configured on my ASA so that when traffic leaves the outside interface, it is PAT-ed to the external ISP IP (108.x.x.x). I ran packet-tracer to confirm - and packet tracer says it is allowed out - and shows it PAT-ed to the 108.x.x.x IP.
The problem: None of my 10.x.x.x networks can get out to the Internet. If i plug directly into the ATT 5031NV with a statically assigned 192.168.1.x IP (that's the DHCP Pool range the 5031nv gives out) - I can get out to the Internet with no issues.
I found that I can also not ping my default (ISP) gateway from my Cisco ASA. See below with updated (11/5/2015) config. I made several changes based on comments from this thread.
Relevant config on Cisco 3750:
SRPC-CORE-OFFICE#sho run | s router ospf router ospf 1 passive-interface default no passive-interface GigabitEthernet1/0/3 network 10.1.1.0 0.0.0.255 area 1 network 10.1.2.0 0.0.0.255 area 1 network 10.1.3.0 0.0.0.255 area 1 SRPC-CORE-OFFICE#sho ip route Gateway of last resort is not set 10.0.0.0/8 is variably subnetted, 6 subnets, 2 masks C 10.1.1.0/24 is directly connected, Vlan100 L 10.1.1.1/32 is directly connected, Vlan100 C 10.1.2.0/24 is directly connected, Vlan120 L 10.1.2.1/32 is directly connected, Vlan120 C 10.1.3.0/24 is directly connected, Vlan130 L 10.1.3.1/32 is directly connected, Vlan130 172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks C 172.16.0.0/24 is directly connected, GigabitEthernet1/0/3 L 172.16.0.1/32 is directly connected, GigabitEthernet1/0/3 S 192.168.0.0/16 is directly connected, GigabitEthernet1/0/3 S 192.168.5.0/24 is directly connected, GigabitEthernet1/0/3
SRPC-CORE-OFFICE#sho ip int br | ex un Interface IP-Address OK? Method Status Protocol Vlan100 10.1.1.1 YES NVRAM up up Vlan120 10.1.2.1 YES NVRAM up up Vlan130 10.1.3.1 YES NVRAM up up GigabitEthernet1/0/3 172.16.0.1 YES NVRAM up up
SRPC-CORE-OFFICE#sho vlan br | i active 100 MANAGEMENT active 120 SRPC_WIFI active 130 SRPC_DATA active
Cisco ASA5506 relevant config:
SRPC-FW-01# sho run nat ! object network obj_any nat (dmzTest,outside) dynamic interface router ospf 1 network 18.104.22.168 255.255.255.0 area 1 network 10.1.1.10 255.255.255.255 area 1 network 192.168.1.0 255.255.255.0 area 1 log-adj-changes default-information originate ! route dmzTest 10.1.0.0 255.255.224.0 172.16.0.1 1 ! ! SRPC-FW-01# sh int ip br Interface IP-Address OK? Method Status Protocol GigabitEthernet1/1 22.214.171.124 YES DHCP up up GigabitEthernet1/2 172.16.0.2 YES CONFIG up up ! ! SRPC-FW-01# sho nameif Interface Name Security GigabitEthernet1/1 outside 0 GigabitEthernet1/2 dmzTest 100 ! access-list dmzTest-in extended permit tcp any any access-list dmzTest-in extended permit icmp any any access-list dmzTest-out extended permit tcp any any access-list management-in extended permit ip any any access-list management-out extended permit ip any any access-list OutsideATT-in extended permit ip any any access-list OutsideATT-out extended permit ip any any access-list dmztest-out extended permit icmp any any access-list outside_inbound_to_SRPC extended deny ip any any access-list outside_inbound_to_SRPC extended permit ip host 126.96.36.199 any access-list outside_outbound_to_INET extended permit ip 188.8.131.52 255.255.252.0 any access-list outside_outbound_to_INET extended permit ip any any ! ! ! access-group outside_inbound_to_SRPC in interface outside access-group outside_outbound_to_INET out interface outside access-group dmzTest-in in interface dmzTest access-group dmzTest-out out interface dmzTest access-group OutsideATT-in in interface OutsideATT access-group OutsideATT-out out interface OutsideATT access-group management-in in interface management access-group management-out out interface management ! SRPC-FW-01# sho route Gateway of last resort is 184.108.40.206 to network 0.0.0.0 S* 0.0.0.0 0.0.0.0 [1/0] via 220.127.116.11, outside S 10.1.0.0 255.255.224.0 [1/0] via 172.16.0.1, dmzTest C 18.104.22.168 255.255.252.0 is directly connected, outside L 22.214.171.124 255.255.255.255 is directly connected, outside C 172.16.0.0 255.255.255.0 is directly connected, dmzTest L 172.16.0.2 255.255.255.255 is directly connected, dmzTest