[TriLUG] Network Routing

[Jason Purdy]

I need some help in figuring out some networking "stuff" - I have a 
Debian Linux server with two NIC's, one hooked up to the internal switch 
and the other hooked to a switch that splits out our (fractured) T-1. 
I'm also in the middle of an ipsec (FreeS/WAN) install, which may be 
messing things up.

I can ping our internal network just fine.  When I ping up our internet, 
I start to see duplicating bouncebacks:

# ping 192.168.0.1
PING 192.168.0.1 (192.168.0.1): 56 data bytes
64 bytes from 192.168.0.1: icmp_seq=0 ttl=64 time=4.1 ms

# ping ###.###.###.113
PING ###.###.###.113 (###.###.###.113): 56 data bytes
64 bytes from ###.###.###.113: icmp_seq=0 ttl=254 time=0.6 ms
64 bytes from ###.###.###.113: icmp_seq=1 ttl=254 time=0.6 ms

# ping ###.###.###.112
PING ###.###.###.112 (###.###.###.112): 56 data bytes
64 bytes from ###.###.###.115: icmp_seq=0 ttl=255 time=0.0 ms
64 bytes from ###.###.###.116: icmp_seq=0 ttl=255 time=0.2 ms (DUP!)
64 bytes from ###.###.###.113: icmp_seq=0 ttl=254 time=0.8 ms (DUP!)

# route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use 
Iface
###.###.###.112 *               255.255.255.248 U     0      0        0 eth1
###.###.###.112 *               255.255.255.248 U     0      0        0 
ipsec1
192.168.0.0     *               255.255.255.0   U     0      0        0 eth0
192.168.0.0     *               255.255.255.0   U     0      0        0 
ipsec0
default         ###.###.###.113 0.0.0.0         UG    0      0        0 eth1
default         192.168.0.1     0.0.0.0         UG    0      0        0 eth0

So now I cannot ping any external IP #'s:
# ping 152.2.25.2
PING 152.2.25.2 (152.2.25.2): 56 data bytes

--- 152.2.25.2 ping statistics ---
150 packets transmitted, 0 packets received, 100% packet loss

Ifconfig output below...

I'm not sure what this all means.  Can someone point me in the right 
direction?

Thanks,

Jason

PS: I #'d out the IP addresses not b/c I don't trust you guys ... more 
like the harvesters on the Web access to our mailing list.

PSS: ifconfig output:

# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:07:E9:80:86:FE
           inet addr:192.168.0.12  Bcast:192.168.0.255  Mask:255.255.255.0
           UP BROADCAST RUNNING MULTICAST  MTU:1492  Metric:1
           RX packets:2213406 errors:0 dropped:0 overruns:0 frame:0
           TX packets:232004 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0
           RX bytes:216728147 (206.6 MiB)  TX bytes:98403841 (93.8 MiB)

eth1      Link encap:Ethernet  HWaddr 00:01:53:80:F0:08
           inet addr:###.###.###.115  Bcast:###.###.###.255 
Mask:255.255.255.248
           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
           RX packets:198033 errors:0 dropped:0 overruns:0 frame:0
           TX packets:71754 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0
           RX bytes:48310063 (46.0 MiB)  TX bytes:7403565 (7.0 MiB)

ipsec0    Link encap:Ethernet  HWaddr 00:07:E9:80:86:FE
           inet addr:192.168.0.12  Mask:255.255.255.0
           UP RUNNING NOARP  MTU:16260  Metric:1
           RX packets:0 errors:0 dropped:0 overruns:0 frame:0
           TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0
           RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

ipsec1    Link encap:Ethernet  HWaddr 00:01:53:80:F0:08
           inet addr:###.###.###.115  Mask:255.255.255.248
           UP RUNNING NOARP  MTU:16260  Metric:1
           RX packets:0 errors:0 dropped:0 overruns:0 frame:0
           TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0
           RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

lo        Link encap:Local Loopback
           inet addr:127.0.0.1  Mask:255.0.0.0
           UP LOOPBACK RUNNING  MTU:16436  Metric:1
           RX packets:449 errors:0 dropped:0 overruns:0 frame:0
           TX packets:449 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0
           RX bytes:35992 (35.1 KiB)  TX bytes:35992 (35.1 KiB)