I have an interesting use case!(of course, it might not be interesting for others ) i am sending packet beat flow data to elastic search. While analysing the data in kibana i want few custom tags so i opted for scripted fields. But, the problem is i have source.ip and dest.ip in each indexed document and want to assign a name based on these ips dynamically by getting these ip to host mapping from a centralised place. can i do that in painless or is there any alternative to that?