TELECOMMUNICATIONS-FUNDAMENTALS5 MIN READ
Push back on open all ports
Negotiate a narrow, testable firewall change for SIP and RTP without blocking service restoration.
Devin D Security Engineer 1 Clarify 2 Bound 3 Verify Emergency request 20 sec One-way audio fix request The carrier asks for a broad RTP exception from anywhere to the phone subnet. The queue is down now. A broad emergency rule can fix a call and create a durable attack path. 50k ports in proposed range now service pressure
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