__Elasticsearch, Firewall, HTTP, Linux, Network Administration, Network Security, System Admin, Web

[Diagnose Elasticsearch Network Issue](https://freelancer.com/projects/elasticsearch/diagnose-elasticsearch-network-issue.html) My Elasticsearch cluster has suddenly started returning blank responses. I’ve confirmed the indices and mappings are intact, so I’m convinced the fault lies in the current network configuration, even though nothing has been modified recently on my end. I need someone who understands routing, firewalls, and the way Elasticsearch nodes communicate over TCP/HTTP to jump in, trace the packets, and pinpoint the bottleneck. You should be comfortable running curl queries, checking transport and HTTP ports, reviewing DNS or load-balancer rules, and adjusting any mis-configured security groups or firewall rules if we discover them. The task ends when queries to th...