host unreachable

[MaDuNiX]

Can You Tell Me Why I keep getting this message "host unreachable"?
Any Help In This Issue.....
Running RedHat 9.0

Sep  3 15:20:06 linux sysctl: net.ipv4.ip_forward = 0
Sep  3 15:20:06 linux sysctl: net.ipv4.conf.default.rp_filter = 1
Sep  3 15:20:06 linux sysctl: kernel.core_uses_pid = 1
Sep  3 15:20:06 linux network: Setting network parameters:  succeeded
Sep  3 15:20:06 linux network: Bringing up loopback interface:  succeeded
Sep  3 15:20:06 linux kernel: eth0: Setting 100mbps full-duplex based on
auto-negotiated partner ability 41e1.
Sep  3 15:20:06 linux network: Bringing up interface eth0:  succeeded
Sep  3 15:20:09 linux kernel: e100: eth1 NIC Link is Up 100 Mbps Full duplex
Sep  3 15:20:09 linux network: Bringing up interface eth1:  succeeded
Sep  3 23:49:39 linux named[1778]: client 127.0.0.1#33667: error sending
response: host unreachable
Sep  4 14:14:21 linux named[1778]: client 127.0.0.1#34910: error sending
response: host unreachable
Sep  4 15:34:21 linux named[1778]: client 127.0.0.1#35027: error sending
response: host unreachable
Sep  4 15:49:38 linux named[1778]: client 127.0.0.1#35048: error sending
response: host unreachable
Sep  4 16:00:36 linux named[1778]: client 127.0.0.1#35065: error sending
response: host unreachable