Grandstream Networks GVC3200 Administration Manual page 42

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RTP IP Filter
Support SIP
Instance ID
Validate Incoming
SIP Messages
Check SIP User ID
for Incoming
INVITE
Authenticate
Incoming INVITE
SIP Realm Used
for Challenge
INVITE & NOTIFY
Only Accept SIP
Requests from
Known Servers
Firmware Version 1.0.1.48
http://arttel.ru/shop/videokonferentsii/grandstream-gvc3202
It is used to configure whether to filter received RTP packets. The options are
"Disable", "IP Only" and "IP and Port". The default setting is "Disable".
This setting can be used with "Symmetric RTP". Please see below:

Symmetric RTP = No, RTP IP Filter = Disable
The device sends RTP packets to the IP:Port included in SDP and accepts RTP
packets from any address.

Symmetric RTP = Yes, RTP IP Filter = Disable
The device sends RTP packets to the IP:Port where the RTP packets come from
and accepts RTP packets from any address.

Symmetric RTP = No, RTP IP Filter = IP Only
The device sends RTP packets to the IP:Port included in SDP and only accepts
RTP packets from the IP in the SDP.

Symmetric RTP = Yes, RTP IP Filter = IP Only
The device sends RTP packets to the IP:Port where the RTP packets come from
and only accepts RTP packets from the IP in the SDP.

Symmetric RTP = Yes, RTP IP Filter = IP and Port
The device only sends RTP packets to the IP:Port included in SDP and only
accepts RTP packets from the IP:Port in the SDP.
It is used to set if the device will send SIP Instance ID. The SIP instance ID is used
to uniquely identify the device. If set to "Yes", the SIP Register message Contact
header will include +sip.instance tag. The default setting is "Yes".
It is used to set if the device will check the incoming SIP messages caller ID and
Cseq headers. If the message does not include the headers, it will be rejected. The
default setting is "No".
It is used to set if the device will check the SIP User ID in the Request URI of the
SIP INVITE message from the remote party. If it doesn't match the SIP User ID
configured on the device, the call will be rejected. If set to "Yes", this feature will be
active. The default setting is "No".
It is used to set if the device will authenticate the SIP INVITE message from the
remote party. If set to "Yes", the device will challenge the incoming INVITE for
authentication with SIP 401 Unauthorized response. The default setting is "No".
This is used to verify incoming INVITE and NOTIFY (including check-sync, re-sync
and reboot). It's only effective when SIP authentication is enabled.
It is used to set if the device will answer the SIP request from saved servers. If set to
"Yes", only the SIP requests from saved servers will be accepted and the SIP
requests from the unregistered server will be rejected. The default setting is "No".
GVC3200/GVC3202 Administration Guide Page 41 of 71