There could be other reasons why your unit hung, but given your
symptoms and where it was hanging, my experience would lean
towards your unit not being able to contact the RDDNS server during
bootup, either because of network, DNS, ethernet, RDDNS server being
down, etc. problems.
At the end of bootup, your unit tries to update RDDNS server if you have
IVS configured. If it can't resolve rddns-production.replaytv.net or can't
contact your DNS server, it will hange there for a while (maybe 10 minutes)
but eventually it'll start responding to remote again if you just let it sit.
symptoms and where it was hanging, my experience would lean
towards your unit not being able to contact the RDDNS server during
bootup, either because of network, DNS, ethernet, RDDNS server being
down, etc. problems.
At the end of bootup, your unit tries to update RDDNS server if you have
IVS configured. If it can't resolve rddns-production.replaytv.net or can't
contact your DNS server, it will hange there for a while (maybe 10 minutes)
but eventually it'll start responding to remote again if you just let it sit.