User manual

NANO 2 – Additional Features
User Manual v2.8
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45
5.5.3. NAT
Navigation: General Setting > SIP settings > NAT: This is where you can configure the
NAT sip settings.
Email Settings
Extern IP
Configure a static address and port (optional) that will be used in
outbound SIP messages if the Nano2PBX is behind NAT.
Extern Host
you can specify an external host name, and Asterisk will perform DNS
queries periodically based on the External Refresh Interval
Extern Refresh
Configure the refresh interval for the external host (if used) The default
setting is 10.
Local Network
Address
Specify a list of network addresses that are considered inside of the
NAT network. Multiple entries are allowed. If not configured, the
external IP address will not be set correctly.
A sample configuration could be as follows: 192.168.0.0/255.255.0.0
NAT Mode
This is a global NAT setting that will affects all peers and users. The
default setting is “YES".
• YES = Always ignore info and assume NAT
• NO = Use NAT mode only according to RFC3581
• NEVER = Never attempt NAT mode or RFC3581 support
• ROUTE = Assume NAT, don't send report.
Allow RTP Reinvite
If enabled, the Nano2PBX will try to redirect the RTP media stream
(audio) to go directly from the caller to the callee. The default setting is
"No NAT".
• Yes
• No NAT: Allow media path redirection (Reinvite) but only when the
peer is not be behind NAT. The RTP core can detect if the peer is
behind NAT or not based on the IP address where the media comes
from.
• Update: Use UPDATE for media path redirection, instead of INVITE.
Note: Some devices do not support this (especially if one of them is