7.3. GS BT-100 with Siproxd running "in front of" a NAT router

Scenario:

private IP address range             :          Internet
10.0.0.x                             :          (public IP address range)
                                     :
                                     :         foo.bar.org
+-------------+               +--------------+
!             !.10         .1 ! masquerading ! publicIP
! SIP UA      !---------------! NAT router   !------------>>  
! BT-100      !      !        !              !
+-------------+      !        +--------------+
                     !    eth0       :        ppp0
                     !               :       
                     !               :       
                eth0 !.2                     
              +-------------+                
              !   siproxd   !                
              !             !                
              +-------------+                

Siproxd is running on 10.0.0.2. The masquerading NAT router (e.g. a ADSL NAT router that cannot run any user applications).

siproxd.conf:

if_inbound  = eth0
if_outbound = eth0
host_outbound = foo.bar.org
hosts_allow_reg = 10.0.0.0/24
sip_listen_port = 5060
daemonize = 1
silence_log = 1
user = siproxd
registration_file = /var/lib/siproxd_registrations
pid_file = /var/run/siproxd/siproxd.pid
rtp_proxy_enable = 1
rtp_port_low  = 7070
rtp_port_high = 7089
rtp_timeout = 300
default_expires = 600
debug_level = 0
debug_port = 0

NAT router configuration:

forward all incoming traffic on 5060/udp to 10.0.0.2
forward all incoming traffic from 7070/udp - 7089/udp to 10.0.0.2

Phone configuration:

IP Address:             10.0.0.10
Subnet Mask:            255.255.255.0
Default Router: 10.0.0.1
DNS Server 1:           <DNS Server of your Internet provider>
SIP Server:             proxy01.sipphone.com
Outbound Proxy: 10.0.0.2
SIP User ID:            1747669xxxx
Authenticate ID:        1747660xxxx
Authenticate Passwd:    *********
Name:                   Your Name Here
Use DNS SRV:            no
User ID is phone #:     no
Sip Registration:       yes
Unregister on reboot:no
Register expiration:    60
Early Dial:             no
local SIP port: 5060
local RTP port: 5004
Use random port:        yes
NAT traversal:  no
Use NAT IP:             <empty>
Subscribe for MWI:      No
Send DTMF:              via RTP (RFC2833)