syslog input does not lookup IP addresses

[jordansissel]

(This issue was originally filed by @Wilfred at elastic/logstash#1713)

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I've found that my logstash instance isn't doing reverse lookups for IP addresses if messages come in through the syslog input.

Have I configured it incorrectly, or is this a bug in logstash? My other inputs are happily converting IP addresses to hostnames.

[Wilfred]

Thanks, I didn't know about the DNS filter.

This feels like an inconsistency -- I have a range of inputs, and only my syslog events aren't looked up. However, using the DNS filter is perfectly fine.

Is this worth fixing? If not, I'm happy to close.