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I have many SIP servers, but none of them have an external network. Can I use a server with an external network to proxy many SIP servers without an external network

asked Feb 24, 2021 at 3:55
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  • I'm not an expert on this topic, so I can't provide an answer, but I would suggest you look into the concept of a 'Reverse Proxy' for SIP Servers - it seems there's information on this around the web. Commented Feb 24, 2021 at 5:05

2 Answers 2

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Yep, you can.

Try using opensips or asterisk as a proxy to redirect calls to nat endpoints. What you’re trying to do is basically how sip providers work

Example: Proxy example

User A is your NAT SIP Servers, Proxy is NAT/External SIP Server and B is PSTN Gateway or PSTN/SIP Provider

In case you have no idea how to get started, here is a useful article, it covers devices but we can consider that devices and servers are endpoints, so the article is for you: Using SIP Devices behind NAT

Sabito
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answered Feb 25, 2021 at 16:35
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This is called a SBC Session-Border-Controller. Have a nice day.

answered Feb 24, 2021 at 13:42

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