NAT Traversal Settings Help

General Settings The General Settings page consists of a manipulation radio buttons group to select the mode of the NAT Traversal usage for the SIP traffic (any incoming and outgoing SIP messages from and to the Quadro will be routed through the NAT server).

• Automatic - with this selection, system will analize the Quadro's WAN IP address and if it is in the IP range specified for local networks (according to RFC), the SIP traffic will be routed through NAT, otherwise, if Quadro's WAN IP address is outside the specified IP range, no SIP traffic will be routed through NAT server.
• Force - with this selection, all the SIP traffic will be routed through the NAT server.
• Disable - with this selection, no SIP traffic will be routed through the NAT server.

SIP Parameters page is used to configure NAT specific settings for SIP. Page consists of two independent groups of settings:

• UDP Parameters:

Manipulation radio buttons allow you to select the type of the connection over NAT:
• Use STUN selection will switch to automatic discovery of Mapped settings for the SIP UDP traffic over NAT. STUN settings are configured in the STUN Parameters page.
• Use Manual NAT Traversal selection allows you to manually define the Mapped settings for the SIP UDP traffic over NAT.
  Mapped Host text fields require the WAN IP address of the router the Quadro is connected to. The IP-Clipboard button offers a conveniant possibility to enter IP address that have been used before.
  Mapped Port text field requires the corresponding router's port number.
• TCP/TLS Parameters:
  Mapped TCP Host text fields require the Mapped Host for SIP TCP traffic over NAT. The IP-Clipboard button offers a conveniant possibility to enter IP address that have been used before.
  Mapped TCP Port text field requires the port on the Mapped host for the SIP TCP traffic over NAT.
  Mapped TLS Host text fields require the Mapped Host for SIP TLS traffic over NAT. The IP-Clipboard button offers a conveniant possibility to enter IP address that have been used before.
  Mapped TLS Port text field requires the port on the Mapped host for the SIP TLS traffic over NAT.

The RTP Parameters page is used to choose between the STUN and Manual NAT traversal connection for the RTP traffic and to define the RTP/RTCP ports for the connection over NAT.

Manipulation radio buttons allow you to select the type of the connection over NAT:

• Use STUN selection will switch to automatic discovery of Mapped settings for the RTP UDP traffic over NAT. STUN settings are configured in the STUN Parameters page.
• Use Manual NAT Traversal selection allows you to manually define the RTP/RTCP port ranges for the RTP traffic over NAT:
  Mapped Host text field requires the WAN IP address of the router Quadro is connected to. The IP-Clipboard button offers a conveniant possibility to enter IP address that have been used before.
  The Mapped RTP/RTCP Port Range fields require entering the port range values specified on the router Quadro is connected to:
  • Min - minimal port has to be higher than 1024 and lower than the maximal port range. Even numbers are allowed only.
  • Max - maximal port has to be lower than 65536 and higher than the minimal port range. Odd numbers are allowed only.

The STUN Parameters page enables automatic NAT configuration through STUN server and is used to configure the STUN (Simple Traversal of UDP over NAT) client on the Quadro. This page requires following data to be inserted:

• The text field STUN Server requires the hostname or the IP address of the STUN server. The text field STUN Port requires the port number of the STUN server.
• The Secondary STUN Server and Secondary STUN Port text fields respectively require the parameters of the secondary STUN server.
• The drop down list Polling Interval contains available time intervals between the single polling accesses to the STUN server.
• The text field Keep-alive interval allows inserting the time interval (in seconds) for the repeat the keep NAT mapping alive procedure. The value should be in the range of 10 to 300 seconds.
• The NAT IP checking interval text field indicates the interval (in seconds) between the NAT IP checking attempts (used to distinguish the possible NAT IP address changes and to perform registration on the new host). The value should be in the range of 10 to 3600.

The NAT Exclusion Table page includes a table where all possible IP ranges are listed that allows you to exclude some network addresses from being NATed. For example, if a Quadro user needs to make SIP calls within the local network as well as outside that network, all local IP addresses are required to be excluded from NAT traversal settings by being listed in this table. Otherwise, malfunction may occur in SIP operations.

The NAT Exclusion Table offers the following components:

Add opens the Add Entry page where a new IP range may be added specifying it by its IP Address and Subnet Mask:

• The text field IP Address requires an IP address that is placed behind NAT within the local network.
• The text field Subnet Mask requires a subnet mask corresponding to the specified IP address.

Edit opens the Edit Entry page where the IP range may be modified. This page includes the same components as the Add Entry page does.
Delete removes all selected table entries.
Select all checks all entries, e.g. in order to be deleted.
Inverse Selection reverses the selection (if no records are selected, Inverse Selection button checks all records).