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Beginner

remote office vdc registration on vcse - filter sip spam calls

Hi all, I have some doubts about registering remote offices vdc systems on our Cisco Expressway.

Actually remote vdc is natted on public ip and it receives random sip calls.

I understood the only solution is to deny sip protocol on firewall, even if I register remote vdc on our Expressway. Of course in this way remote office can receive only h323 calls.

Can anyone confirm if it is correct ?

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