why can't ping localhost

cnhawk386 · 09-19-2007, 02:21 AM

[root@wlxxb log]# ping localhost
ping: unknown host localhost
You have new mail in /var/spool/mail/root
[root@wlxxb log]# nslookup
> localhost
Server: 192.168.0.12
Address: 192.168.0.12#53

Name: localhost
Address: 127.0.0.1

why???

ZAMO · 09-19-2007, 02:33 AM

Your Firewall may block this pinging to local. you can check this by typing iptables -L

wimdh · 09-19-2007, 03:16 AM

Can you ping 127.0.0.1?

cnhawk386 · 09-19-2007, 04:08 AM

Quote:

Originally Posted by ZAMO

Your Firewall may block this pinging to local. you can check this by typing iptables -L

[root@wlxxb bin]# service iptables stop
....
[root@wlxxb bin]# ping localhost
]ping: unknown host localhost

cnhawk386 · 09-19-2007, 04:09 AM

Quote:

Originally Posted by wimdh

Can you ping 127.0.0.1?

ping 127.0.0.1
PING 127.0.0.1 (127.0.0.1) 56(84) bytes of data.
64 bytes from 127.0.0.1: icmp_seq=0 ttl=64 time=0.075 ms
64 bytes from 127.0.0.1: icmp_seq=1 ttl=64 time=0.064 ms
64 bytes from 127.0.0.1: icmp_seq=2 ttl=64 time=0.052 ms

soroccoheaven · 09-19-2007, 06:07 AM

it can be because of "self-address resolution problem" ..Otherwise, there may be a firewall between the two hosts or You can also have a problem because your host has multiple network interfaces connected to differents isolated networks. I think this can be due to "self-address resolution problem" with you.
so you need to check your /etc/hosts file ..should be somthing like this..
127.0.0.1 localhost.localdomain localhost

Thanks