<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div><blockquote type="cite"><div>How Live555 client side library makes UDP ports reachable from the global network for incoming UDP traffic when both client and server are under NAT</div></blockquote><div><br></div>In short, it can't. RTSP works by having a RTSP client contact a RTSP server, to request a specific stream. If the RTSP client can't contact the RTSP server, either by name or IP address (because the server is behind a NAT and has only a private IP address), then RTSP won't work. (On the other hand, if just the RTSP client - but not the RTSP server - is hidden behind a NAT, then RTSP will often work OK.)</div><div><br></div><div>What people usually do to overcome this is put a "LIVE555 Proxy Server" on a public-facing computer (i.e., one that has a public IP address), and have that proxy server stream from a 'back-end' RTSP server that can be on a private network. (If the proxy server computer can't contact the 'back-end' server, then instead, the 'back-end' server can contact the proxy server, using our custom RTSP "REGISTER" command, as described in our proxy server documentation: <<a href="http://www.live555.com/proxyServer/">http://www.live555.com/proxyServer/</a>>) Then, clients (including those that are themselves behind a NAT) can access the stream via the (public) proxy server.</div><br><br><div apple-content-edited="true">
<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; ">Ross Finlayson<br>Live Networks, Inc.<br><a href="http://www.live555.com/">http://www.live555.com/</a></span></span>
</div>
<br></body></html>