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trojan81

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Question about Microsoft RPC and firewalls

Experts,

Suppose I have client-A on DMZ1 and server-B on DMZ2.
I allow CLIENT-A to reach server-B on TCP-135.

Suppose the RPC mapper on the server now tells the client to connect on port 1023.
Am I correct to assume this second connection is a new tcp session and if it's not permitted in the firewall ACL, then it will be dropped?
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Chris
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trojan81

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well done thank you