What does this mean and how should I react:
drop udp [$EXTERNAL_NET,![52.23.111.175]] 3478 -> 192.168.1.211 any (msg:"ET INFO Session Traversal Utilities for NAT (STUN Binding Response)"; content:"|01 01|"; depth:2; content:"|21 12 a4 42|"; distance:2; within:4; reference:url,tools.ietf.org/html/rfc5389; classtype:attempted-user; sid:4000067; rev:1; metadata:created_at 2013_01_04, updated_at 2013_01_04
Seems to be coming from Amazon to my computer.
drop udp [$EXTERNAL_NET,![52.23.111.175]] 3478 -> 192.168.1.211 any (msg:"ET INFO Session Traversal Utilities for NAT (STUN Binding Response)"; content:"|01 01|"; depth:2; content:"|21 12 a4 42|"; distance:2; within:4; reference:url,tools.ietf.org/html/rfc5389; classtype:attempted-user; sid:4000067; rev:1; metadata:created_at 2013_01_04, updated_at 2013_01_04
Seems to be coming from Amazon to my computer.