$TTL 300 ; example.org @ IN SOA ns1.example.org. postmaster.example.org. ( 2018111111 ; Serial 28800 ; Refresh 1800 ; Retry 604800 ; Expire - 1 week 86400 ) ; Negative Cache TTL IN NS ns1 ns1 IN A 192.5.0.10 server1 IN A 192.5.0.20 server2 IN A 192.5.0.30 xp1 IN A 192.5.0.40 xp2 IN A 192.5.0.50 xp3 IN A 192.5.0.60 web1 IN A 192.5.0.70 web2 IN A 192.5.0.80 one IN CNAME web1 two IN CNAME web1 #_xmppconnect.one IN TXT "_xmpp-client-websocket=wss://one.example.org:5281/xmpp-websocket" #_xmppconnect.two IN TXT "_xmpp-client-websocket=wss://two.example.org:5281/xmpp-websocket" scansion.one IN CNAME xp3 scansion.two IN CNAME xp3