<div dir="ltr">1) Create VPN connection betwen Sip_B (client) and Sip_A (server);<div>2) On VPN interface configure static IP address;</div><div>3) Configure station on Sip_B and gateway on Sib_A;</div><div>4) Route call from Sip_A to Sip_B like you has configured routing call Sip_B to Sip_A;</div><div>5) To allow FS listen on VPN IP when VPN connection is down cconfigure sysctl variable "net.ipv4.ip_nonlocal_bind = 1"</div><div><a href="https://wiki.freeswitch.org/wiki/Freeswitch_HA">https://wiki.freeswitch.org/wiki/Freeswitch_HA</a><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Feb 25, 2015 at 5:37 AM, Robert Oldham <span dir="ltr"><<a href="mailto:robert@oldhamtechnology.com" target="_blank">robert@oldhamtechnology.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I have two FreeSWITCH servers that I need to gateway calls between.<br>
Sip_A is on a public network with a static IP address. Sip_B is on a<br>
private network that is NAT'd. I am trying to pass calls from devices<br>
connected to Sip_B, through Sip_A and on to another server. I am also<br>
trying to pass calls from Sip_A into Sip_B. I don't have access to the<br>
firewall at the location of Sip_B so I am not able to forward standard<br>
ports into Sip_B.<br>
<br>
I am fairly new to FreeSWITCH, so I'm not certain how to solve this<br>
problem well. Many of the documents I have read online recommend using<br>
ACLs and port forwards for this. However, the private network does not<br>
have a static IP address that I can give access to and, as mentioned, I<br>
cannot make port forwards. Instead, I have created an extension on Sip_A<br>
and a gateway on Sip_B that registers using the extension on Sip_A. That<br>
works fine for passing calls from Sip_B through Sip_A and on. Sip_B has<br>
been maintaining a registered connection to Sip_A through the NAT'd<br>
connection for several days now without trouble.<br>
<br>
Not knowing a better solution, I have been searching for a gateway<br>
configuration on Sip_A that would allow it to route calls back over the<br>
registered extension from Sip_B. I have not found a way to accomplish it<br>
yet. As an alternative, I have also tried without success to create a<br>
passive gateway on Sip_A that the gateway on Sip_B could register with.<br>
<br>
Any help is appreciated!<br>
<br>
Thanks,<br>
Robert<br>
<br>
<br>
<br>
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</blockquote></div><br></div>