Trust Mode

To configure the trust mode:

In Superuser mode, type configure terminal and press Enter.
```
ORACLE# configure terminal
```
Type session-router and press Enter to access the system-level configuration elements.
```
ORACLE(configure)# session-router
```
Type sip-interface and press Enter. The system prompt changes to let you know that you can begin configuring individual parameters.
```
ORACLE(session-router)# sip-interface
ORACLE(sip-interface)#
```
From this point, you can configure SIP interface parameters. To view all sip-interface parameters, enter a ? at the system prompt.
If configuring an existing interface, enter the select command to select the interface.
trust-mode—Select the trust mode for this SIP interface. The default value is all. The valid values are:
- all—Trust all previous and next hops except untrusted session agents
- agents-only—Trust only trusted session agents
- realm-prefix—Trusted only trusted session agents or address matching realm prefix
- registered—Trust only trusted session agents or registered endpoints
- none—Trust nothing

Save and activate your configuration.

The following example shows the trust-mode set to none. The remaining SIP interface options are omitted for brevity.

sip-interface
        state                          enabled
        realm-id                       access1
        sip-port
                address                        192.168.1.30
                port                           5060
                transport-protocol             UDP
                allow-anonymous                all
        carriers
        proxy-mode                     Proxy
        redirect-action
        contact-mode                   maddr
        nat-traversal                  none
        nat-interval                   30
        registration-caching           disabled
        min-reg-expire                 300
        registration-interval          3600
        route-to-registrar             disabled
        teluri-scheme                  disabled
        uri-fqdn-domain
        options
        trust-mode                     none