IP traffic blocked

I have recently started receiving numerous messages stating that

 

Traffic from IP address ( various addresses ) is blocked from ( various times )

[SID:20386] MSRPCSS Attach (2) detected

 

Also

 

Traffic from IP address ( various addresses ) is blocked from ( various times )

MS RPC Network DDE BO detected

 

What does this all mean ?

What should I do next ?

 

Any info or help would be appreciated