If you look for "SBC" or "B2BUA" as synonyms for "SIP ALG", I expect you'll find lots of thing people think they're good for. <div><br></div><div><span></span><br><br>On Wednesday, February 27, 2013, John Levine wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I realize that an ALG is a hack in a router that is supposed to allow<br>
SIP packets to go through a NAT router. I also realize that for<br>
modern SIP equipment, ALG usually causes more problems than it solves,<br>
and that it's described in RFCs 2663, 3424, and others.<br>
<br>
What I can't find anywhere is what a SIP ALG actually does to the<br>
packets. Is that written down anywhere, or is it just network<br>
folklore?<br>
<br>
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</blockquote></div>