CAT api works fine from a ES nodes
[root@d1r1n1 ~]# curl http://d1r1n1.nat.tdcfoo:9200/_cat/shards
collectd-2016.01.01 3 p STARTED 247950 28.9mb 10.45.70.107 d1r1n7
collectd-2016.01.01 3 r STARTED 247950 28.9mb 10.45.70.101 d1r1n1
collectd-2016.01.01 2 p STARTED 248193 28.8mb 10.45.70.102 d1r1n2
collectd-2016.01.01 2 r STARTED 248193 28.8mb 10.45.70.112 d1r1n12
collectd-2016.01.01 4 r STARTED 248281 28.8mb 10.45.70.113 d1r1n13
collectd-2016.01.01 4 p STARTED 248281 28.8mb 10.45.70.105 d1r1n5
collectd-2016.01.01 1 p STARTED 247813 28.8mb 10.45.70.104 d1r1n4
collectd-2016.01.01 1 r STARTED 247813 28.8mb 10.45.70.108 d1r1n8
collectd-2016.01.01 0 r STARTED 246794 28.6mb 10.45.70.110 d1r1n10
collectd-2016.01.01 0 p STARTED 246794 28.7mb 10.45.70.111 d1r1n11
cassandra-2016.01.02 3 p STARTED 1017461 74.8mb 10.45.70.108 d1r1n8
cassandra-2016.01.02 3 r STARTED 1017461 74.8mb 10.45.70.105 d1r1n5
cassandra-2016.01.02 2 p STARTED 1015395 74.6mb 10.45.70.107 d1r1n7
cassandra-2016.01.02 2 r STARTED 1015395 74.6mb 10.45.70.111 d1r1n11
cassandra-2016.01.02 4 p STARTED 1016612 74.7mb 10.45.70.110 d1r1n10
cassandra-2016.01.02 4 r STARTED 1016612 74.9mb 10.45.70.114 d1r1n14
cassandra-2016.01.02 1 p STARTED 1018421 74.8mb 10.45.70.106 d1r1n6
cassandra-2016.01.02 1 r STARTED 1018421 74.8mb 10.45.70.101 d1r1n1
cassandra-2016.01.02 0 p STARTED 1019313 74.9mb 10.45.70.113 d1r1n13
cassandra-2016.01.02 0 r STARTED 1019313 74.9mb 10.45.70.103 d1r1n3
collectd-2016.01.02 3 r STARTED 106897 12.7mb 10.45.70.104 d1r1n4
collectd-2016.01.02 3 p STARTED 106897 12.7mb 10.45.70.111 d1r1n11
collectd-2016.01.02 2 r STARTED 106886 12.7mb 10.45.70.109 d1r1n9
collectd-2016.01.02 2 p STARTED 106886 12.7mb 10.45.70.101 d1r1n1
collectd-2016.01.02 4 r STARTED 106941 12.7mb 10.45.70.112 d1r1n12
collectd-2016.01.02 4 p STARTED 106941 12.7mb 10.45.70.105 d1r1n5
collectd-2016.01.02 1 r STARTED 106532 12.6mb 10.45.70.102 d1r1n2
collectd-2016.01.02 1 p STARTED 106532 12.6mb 10.45.70.103 d1r1n3
collectd-2016.01.02 0 p STARTED 106922 12.7mb 10.45.70.113 d1r1n13
collectd-2016.01.02 0 r STARTED 106922 12.7mb 10.45.70.114 d1r1n14
cassandra-2016.01.01 3 p STARTED 2353092 172.2mb 10.45.70.106 d1r1n6
cassandra-2016.01.01 3 r STARTED 2353092 172mb 10.45.70.114 d1r1n14
cassandra-2016.01.01 2 p STARTED 2357139 172.5mb 10.45.70.107 d1r1n7
cassandra-2016.01.01 2 r STARTED 2357139 172.5mb 10.45.70.110 d1r1n10
cassandra-2016.01.01 4 p STARTED 2354945 172.1mb 10.45.70.109 d1r1n9
cassandra-2016.01.01 4 r STARTED 2354945 171.9mb 10.45.70.103 d1r1n3
cassandra-2016.01.01 1 p STARTED 2355439 171.1mb 10.45.70.104 d1r1n4
cassandra-2016.01.01 1 r STARTED 2355439 171.1mb 10.45.70.108 d1r1n8
...
CAT API seems to hang/not connect from my kibana VM even though TCP connect works...
[root@kibana tmp]# curl http://d1r1n1.nat.tdcfoo:9200/_cat/shards
^C
[root@kibana tmp]# telnet d1r1n1.nat.tdcfoo 9200
Trying 10.45.70.101...
Connected to d1r1n1.nat.tdcfoo.
Escape character is '^]'.
quit
Connection closed by foreign host.
[root@kibana tmp]#