Internet isn't accessible after update

[Kevin J. Cummings]

David Ganger wrote:
> This is the ip configuration for the computer that gets the internet and 
> then passes it on to the router.
> Yes there is intenet connection sharing enabled.
> 
> Here is the configuration of the SHARED network connection
> Address Type      Assigned by the DHCP
> IP address           24.11.226.117
> Subnet Mask       255.255.254.0
> Default Gateway  24.11.226.1
> Here is the configuration of the second network connection
> Address Type      Manually configured
> IP address           192.168.0.1
> Subnet Mask       255.255.255.0
> Default Gateway
> 
> Router ip address  192.168.0.11
> 
> ---------------------------------------------------------------------------------------------------------------- 
> 
> 
> On the linux computer
> ifconfig -a
> 
> eth0        Link  encap:Ethernet  HWaddr  00:04:5A:8D:9F:65
>              inet  addr:192.168.0.23  Bcast:192.168.0.255 
> Mask:255.255.255.0
>              inet6  addr:  fe80::204:5aff:fe8d:9f65/64 Scope:Link
>              UP BROADCAST RUNNING MULTICAST MTV:1500 Metric:1
>              RX  packets:483  errors:0  dropped:0  overruns:0  frame:0
>              TX  packets:70  errors:0  dropped:0  overruns:0  carrier:0
>              collisions:0  txqueuelen:1000
>              RX  bytes:141396  (138.0 KiB)  TX  bytes:6374  (6.2  KiB)
>              Interrupts:11  Base  address:Ox4800
> 
> lo           Link  encap:Local  Loopback
>              inet  addr:  127.0.0.1  Mask:255.0.0.0
>              inet6  addr:  ::1/128  Scope:Host
>              UP  LOOPBACK  RUNNING  MTU:16436  Metric:1
>              RX  packets:8  errors:0  dropped:0  overruns:0  frame:0
>              TX  packets:8  errors:0  dropped:0  overruns:0  carrier:0
>              collisions:0  txqueuelen:0
>              RX bytes: 560  (560.0  b)  TX  bytes:560  (560.0  b)
> 
> sit0         Link encap:IPv6-in-IPv4
>              NOARP  MTU:1480  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  txqueuelen:0
>              RX bytes:0  (0.0  b)  TX bytes:0  (0.0  b)
> 
> 
> route -n
> Kernel IP routing table
> Destination        Gateway        Genmask                Flags        
> Metric Ref    Use    Iface
> 192.168.0.0      0.0.0.0           255.255.255.0      U              0 
> 0        0       eth0
> 169.254.0.0      0.0.0.0           255.255.0.0          U              0 
> 0        0       eth0

You don't have a DEFAULT route in your routing table.  Your Linux 
computer can ping local machines (on the 192.168.0 network), including 
your router, but doesn't know what to do with packets destined for 
beyond your local network.  You need a route like:

default 192.168.0.1 0.0.0.0 UG 0 0 0 eth0

the command:

	route add default gw 192.168.0.1 dev eth0

should do it for you, but it belongs in /etc/sysconfig/network as:

GATEWAY=192.168.0.1
GATEWAYDEV=eth0

-- 
Kevin J. Cummings
kjchome at rcn.com
cummings at kjchome.homeip.net
cummings at kjc386.framingham.ma.us