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Re: Why is FQDN not found?



On 07/27/2012 11:35 AM, Camaleón wrote:
On Fri, 27 Jul 2012 09:45:02 -0500, Kent West wrote:

Why can I ping the hostname, but not the fully-qualified domain name of
a box?

westk@westek:~$ ping k1000
PING k1000.acu.local (150.252.149.1) 56(84) bytes of data. 64 bytes from
150.252.149.1: icmp_req=1 ttl=62 time=0.128 ms ^C64 bytes from
150.252.149.1: icmp_req=2 ttl=62 time=0.138 ms

--- k1000.acu.local ping statistics --- 2 packets transmitted, 2
received, 0% packet loss, time 5002ms rtt min/avg/max/mdev =
0.128/0.133/0.138/0.005 ms
(...)

I remember something related to the "/etc/nsswitch.conf" file, the
order of the queried facilities and also the avahi issue with ".local"
domains...

sm01@stt008:~$ cat /etc/nsswitch.conf|grep hosts
hosts:          files mdns4_minimal [NOTFOUND=return] dns mdns4

And let's see if I can ping a local machine using its FQDN:

sm01@stt008:~$ ping -c 3 stt008.linux.site
PING stt008.linux.site (192.168.0.8) 56(84) bytes of data.
64 bytes from stt008.linux.site (192.168.0.8): icmp_seq=1 ttl=64 time=0.016 ms
64 bytes from stt008.linux.site (192.168.0.8): icmp_seq=2 ttl=64 time=0.007 ms
64 bytes from stt008.linux.site (192.168.0.8): icmp_seq=3 ttl=64 time=0.013 ms

--- stt008.linux.site ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 1998ms
rtt min/avg/max/mdev = 0.007/0.012/0.016/0.003 ms

Yes, I can ping *but* I have the above machine listed in my "/etc/hosts"
file.

sm01@stt008:~$ cat /etc/hosts
127.0.0.1	localhost
192.168.0.8	stt008.linux.site	stt008

# The following lines are desirable for IPv6 capable hosts
::1     localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts

Just for testing purposes yo can try with:

hosts:          files mdns4_minimal dns mdns4

Or:

hosts:          files dns mdns4_minimal [NOTFOUND=return] mdns4

(note: I'm sure this was documented in some place but can't find the source
now)

Greetings,


westk@westek:~$ cat /etc/nsswitch.conf
# /etc/nsswitch.conf
#
# Example configuration of GNU Name Service Switch functionality.
# If you have the `glibc-doc-reference' and `info' packages installed, try:
# `info libc "Name Service Switch"' for information about this file.

passwd:         compat
group:          compat
shadow:         compat

hosts:          files mdns4_minimal [NOTFOUND=return] dns mdns4
networks:       files

protocols:      db files
services:       db files
ethers:         db files
rpc:            db files

netgroup:       nis


Changing the order of the hosts: line to:

hosts:          files dns mdns4_minimal [NOTFOUND=return] mdns4

as you suggested above, seems to have solved the problem:

westk@westek:~$ ping k1000.acu.local
PING k1000.acu.local (150.252.149.1) 56(84) bytes of data.
64 bytes from 150.252.149.1: icmp_req=1 ttl=62 time=0.126 ms
^C64 bytes from 150.252.149.1: icmp_req=2 ttl=62 time=0.138 ms

--- k1000.acu.local ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 5001ms
rtt min/avg/max/mdev = 0.126/0.132/0.138/0.006 ms


westk@westek:~$ ping k1000
PING k1000.acu.local (150.252.149.1) 56(84) bytes of data.
64 bytes from 150.252.149.1: icmp_req=1 ttl=62 time=0.128 ms
^C64 bytes from 150.252.149.1: icmp_req=2 ttl=62 time=0.135 ms

--- k1000.acu.local ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 5001ms
rtt min/avg/max/mdev = 0.128/0.131/0.135/0.012 ms


Will this cause me any problems?

--
Kent West<*)))><
http://kentwest.blogspot.com
Praise Yah! \o/



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