Loopback/Hosts trouble

[Rob MacWilliams <robmacw@cl-sys.com>]

  Hi all
  
  I am setting up a new machine to be used as a gateway/IpMasqurade server.  It's going well except
  for one problem.  If I ping it, presumably using loopback because it's not connected to anything,
  I recieve a network unreachable error.  This is only happening when I use it's name, any service
  works if I use localhost, so I am assuming the loopback interface is up and running fine but there
  is something weird going on with the host lookup.  Ifconfig reveals that the loopback interface is
  up and running correctly:
  
  $/sbin/ifconfig
  lo        Link encap:Local Loopback  
            inet addr:127.0.0.1  Bcast:127.255.255.255  Mask:255.0.0.0
            UP BROADCAST LOOPBACK RUNNING  MTU:3584  Metric:1
            RX packets:96 errors:0 dropped:0 overruns:0
            TX packets:96 errors:0 dropped:0 overruns:0
  
  
  $>ping catbert
  PING catbert (192.168.1.2): 56 data bytes
  ping: sendto: Network is unreachable
  ping: wrote catbert 64 chars, ret=1
  
  $>ping localhost
  PING catbert (127.0.0.1): 56 data bytes
  64 bytes from 127.0.0.1: icmp_seq=0 ttl=64 time=0.5 ms
  
  The host file looks like this:
  
  127.0.0.1		catbert	localhost
  192.168.1.2	catbert
  192.168.1.1	ratbert

  There also seems to be a valid route to loopback.
  
  $>route
  
  Kernel IP routing table
  Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
  localnet        	*               255.0.0.0       U     0      0        2 lo
  
  If I Plip connect to ratbert, the pings just time out, but ratbert can ping it fine.  The plip and
  masqurade setup seem to be working as advertised.
  
  I've tried changing the order of the entries in the host table, this doesn't help.  If I delete or
  comment out the 192.X.X.X entries, it works fine.  The other machine, ratbert, is working fine.
  
  If it matters, catbert is running a custom 2.0.30 kernel on a system that was a clean install of 1.3, 
 and ratbert is running an upgraded 1.3 (from 1.2) base.
 
 
  
  Any clues would be appreciated.  Thanks


----------------------------------------------------------------
"Change is inevitable, except from a vending machine."

Rob MacWilliams   robmacw@cl-sys.com
N9NPU







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