On the dns seeder:
$ dig @127.0.0.1 seed.cryptodistributed.org

;<<>> DiG 9.9.5-3-Ubuntu <<>> @127.0.0.1 seed.cryptodistributed.org
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 61122
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEDUOSECTION:
; EDNS: version; 0, flags:; udp: 4096
;; QUESTION SECTION:
; seed.cryptodistributed.org.        IN        A

;; Query time: 20 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Fri Sep 19 20:23:31 EDT 2014
;; MSG SIZE rcvd: 55