DNS

Larousse, albert and zwinger are listed as authoritative name servers for *.pmtpa.wmnet. Larousse and zwinger are running PowerDNS. All three are running named. (BIND? version?)

Important files

/var/named/master/wmnet.zone 

This is the internal zone, it's the equivalent of /etc/hosts before we massacred that file

/var/named/master/wikimedia.zone 

This is the list of names available externally under *.wikimedia.org

Edit one of these files on zwinger, not forgetting to increment the SOA, and then restart with /etc/init.d/named restart.

Zones

*.pmtpa.wmnet 

10/8 addresses valid within our Tampa network

*.lopar.wmnet 

10/8 addresses valid within our Paris network

*.wikimedia.org 

Assorted external addresses from Tampa and Paris.

resolv.conf in Florida is set up to search *.pmtpa.wmnet then *.wikimedia.org. So if a machine does not have an internal address, the resolver automatically tries for an external address.