stevedrees wrote:
> What is the Best Common Practice for monitoring multiple devices (primarily 
> windows) behind a firewall?


You will need to open 161/tcp and 162/tcp for SNMP and SNMP Traps.

WMI requires 135/tcp and 135/udp in addition to multiple "random" ports above 
1024.

With this in mind I would recommend NOT allowing any WMI and go strictly on 
SNMP.  I would also set the rules so that SNMP is allowed through the firewall 
for specific hosts.

A safer option would be a VPN connection through the firewall, then you'd have 
none of the above limitations.




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