Source OS - Android
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 Is it possible to Filter for an Android device using the "Source OS" in the 
 Advanced Options of a Firewall rule?
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 If it's not in the list already, then no. The fingerprint database comes from FreeBSD: https://github.com/pfsense/FreeBSD-src/blob/189c0a627f96bee933ebb1b814aa1bd5da34a513/sbin/pfctl/pf.os It's quite old, and it's unclear if/when it would be updated upstream. 
- 
 Thanks jimp. was just looking for additional firewall protection for a legacy bespoke FTP device. 
 I'll see what I can do with Suricata rules.
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