Need to support TLS connections

[portante]

It would be great to have this tool support --cert and --key so that we can support TLS connections where ES is behind something like SearchGuard.

[knes1]

I assuming you need client certificates? The TODO list for elktail is currently long, so this feature might not arrive soon. You may look into using stunnel as a proxy (e.g. elktail -> stunnel on local machine with certs configured -> SearchGuard). This should work as a workaround.
http://stackoverflow.com/questions/6817811/setting-up-a-proxy-that-performs-client-certificate-authentication-to-a-remote-s