Cloudera: Ncat: Connection timed out.
Getting this error when connecting Azure instances back to a Cloudera CM + CDH installation?
[root@cm-awn01 ~]# nc -vz srv-c01.mws.mds.xyz 7191
Ncat: Version 7.50 ( https://nmap.org/ncat )
Ncat: Connection timed out.
[root@cm-awn01 ~]#
Ensure ports are defined correctly in the local firewall configuration:
[root@cm-r01xs01 .ssh]# grep -Ei 7191 /etc/firewalld/zones/public.xml
<port protocol="tcp" port="7191"/>
<port protocol="udp" port="7191"/>
[root@cm-r01xs01 .ssh]#
Ensure NAT rules are also in place in case connectivity occurs through an external facing router.
iptables -t nat -I PREROUTING -s 123.123.123.123 -p tcp --dport 7191 -j DNAT --to 192.168.0.120:7191
iptables -I FORWARD -p tcp -d 192.168.0.120 --dport 7191 -j ACCEPT
iptables -t nat -I PREROUTING -s 123.123.123.123 -p udp --dport 7191 -j DNAT --to 192.168.0.120:7191
iptables -I FORWARD -p udp -d 192.168.0.120 --dport 7191 -j ACCEPT
Good Luck!
TK
