On Fri, Jul 27, 2012 at 12:35 PM, Camaleón <noela...@gmail.com> 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 > > 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 > > Just for testing purposes yo can try with: > > hosts: files mdns4_minimal dns mdns4 > Or: > hosts: files dns mdns4_minimal [NOTFOUND=return] mdns4
Given your "/etc/hosts", you're cheating! :) Your nsswitch lookup ends at "files" and doesn't use mdns or dns. "hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4" means that when your box is resolving an address, it checks "files". If it isn't in "/etc/hosts", it checks "mdns4_minimal". If this last query succeeds (basically if a box responds to the multicast query to 224.0.0.251) but the host isn't resolved, the query fails... Without "[NOTFOUND=return]", the query moves on to "dns", and if that fails to "mdns4". The difference between "mdns4_minimal" and "mdns4" is that the former only checks the default mdns ".local" domain. -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/CAOdo=sx8x49_mxoj-b0_39cn33qyzpaadhhciyn06jnsbci...@mail.gmail.com
