Introduction:
Event forwarding (also called SUBSCRIPTIONS) is a mean to send Windows event log entries from source computers to a collector. A same computer can be a collector or a source.
This technology uses WinRM (HTTP protocol on port TCP 5985 with WinRM 2.0, else TCP 80) . Be careful with the Window firewall and configure it to allow WinRM incoming requests.
MS reference:
http://technet.microsoft.com/en-us/library/cc749140.aspx
http://blogs.technet.com/b/askperf/archive/2010/09/24/an-introduction-to-winrm-basics.aspx
http://msdn.microsoft.com/en-us/library/aa384372(v=vs.85).aspx
Tutorials:
1st: Event forwarding between computers in a Domain
2nd: Event forwarding between computers in workgroup
