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IPS protects against attacks by identifying attack signatures and identifying packets with protocol anomalies. In addition, all IPS network security capabilities are supported, such as inspection of fragmented packets, anti-spoofing, and protection against Denial of Service attacks. For each profile, the protection can be Prevent , Inactive , or Detect. Logging options for each protection can also be configured for each profile. Specified VoIP services can be blocked if the services consume more bandwidth than the IP infrastructure can support or if the services simply do not comply with the organization's security policy.
This option blocks MGCP commands that must not be processed. MGCP command filtering makes it possible to block commands that the MGCP server does not support, or that you do not want the server to handle.
There are nine MGCP commands. They are defined in RFC section 2. Important - If an MGCP server is flooded with requests that use commands the server does not support, the server might experience an overload. An overloaded MGCP server will affect customer service levels. RFC section 3. It may be necessary, for experimentation purposes, to use new verbs before they are sanctioned in a published version of this protocol.
It is possible to define new commands, and configure the MGCP Command filtering option to allow these commands. Unknown commands are commands that do not show in the Blocked commands or Allowed commands lists.
By default, all unknown commands are blocked. This option specifies if user-defined commands include an SDP header. If the option is selected, the gateway inspects the SDP header attached to the command. If this option is not selected, the SDP header is ignored. This VoIP security option parses the header and checks that it has the correct syntax. If the destination address and port in the header are allowed, the media connection is allowed through the Gateway. The Protection Settings window opens.
When an MGCP call is made, a number of connections are set up, one of which is intended for fax. The default is not to block. This option prevents opening of MGCP media channels.
Do not select this option if an MGCP media channel passes through the gateway. IPS protects by identifying attacks, identifying packets with protocol anomalies, and ensuring standards compliance. IPS protections are configured for each profile. The option is available on the:. Do not select this option if a SCCP media channel passes through the gateway. Media admission control refers to how a VoIP Server lets one endpoint to send media directly to a different endpoint.
Static NAT can be configured for the phones on the internal side of the gateway. The IP Phones use the services of a Proxy on the external side of the gateway. This topology enables using the services of a Proxy that is maintained by another organization. Each Proxy controls a separate endpoint domain.
Static NAT can be configured for the internal Proxy. The same Proxy controls both endpoint domains. This topology makes it possible to provide Proxy services to other organizations. The phone's extension is Here, all the internal phones are registered with the same Source IP: port combination, for example: sip A different phone with extension would register as sip As a result, only one of the phones behind that IP address will be registered successfully on the server.
Here, a different port is allocated for each internal phone. Each phone is registered with a different Source IP: port combination. For example: one phone is registered as sip A different phone with extension is registered as for example sip As a result, all of the internal phones are registered successfully on the server.
NAT is not supported for connections of this type.
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