I've installed Elastic Search 1.7.4 on CentOS 7.2 this way:
wget https://download.elastic.co/elasticsearch/elasticsearch/elasticsearch-1.7.4.noarch.rpm sudo rpm -ivh elasticsearch-1.7.4.noarch.rpm
The service is started and ES works (verified with curl), however, it only listens to IPv6 with default configuration. netstat -na gives me the following:
tcp6 0 0 :::9200 :::* LISTEN tcp6 0 0 :::9300 :::* LISTEN
Using nmap from other servers I see that ports 9200 and 9300 are filtered, firewall is disabled.
Editing /etc/elasticsearch/elasticsearch.yml and setting:
doesn't change anything. Setting this to the external IPv4 address of the server does add the additional two entries in netstat -na output, but I need ES to be accessible to my local network, so this is useless and netstat still registers this as tcp6.
tcp6 0 0 192.168.0.54:9200 :::* LISTEN tcp6 0 0 192.168.0.54:9300 :::* LISTEN
Causes ES to bind to the local IPv4 and then it is of course only available from the local server. Omitting the "ipv4" part causes ES to bind to IPv6 address of the NIC.
How do I enable ES to bind to IPv4? I have no alternative, my network is IPv4 only and I have to use this old version of ES because I'm running some applications that require this version.