Problems getting to Verisign's whois server on IPv6

Tue May 1 23:25:05 UTC 2012

The server doesn't do PMTUD properly.   Verisign were informed of this
a while back.  How hard is it to let ICMPv6 PTB in so that PMTUD works?

% whois -h 2001:503:3227:1060::74 example.com

Whois Server Version 2.0

Domain names in the .com and .net domains can now be registered
with many different competing registrars. Go to http://www.internic.net
for detailed information.
[stalls here forever]

The message is sent in 3 packet and you see packet 1 and 3, 2 is
lost and despite selective acks it is never seen.
-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: marka at isc.org