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How to block RTSP traffic on the PIX 500 Series Firewall

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Core issue

Real Time Streaming Protocol (RTSP) works on the Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP) port 554. The traffic can block the RTSP traffic if the ports are blocked on the PIX Firewall.

Resolution

In order to block all the traffic over the RTSP, issue these commands:http://www.cisco.com/en/US/customer/docs/security/pix/pix63/command/reference/ab.html#wp1067755

access-list line 1 deny tcp any any eq 554

access-list line 1 deny udp any any eq 554

This assumes that the outside interface of the PIX has the access-list named outside_access_out.