[SIPForum-discussion] NAT & Firewall Traversal

[praveen subbarao]

Hi All,

I am working on a SIP client. I want to know the concept of "HOW A SIP CLIENT TRAVERSE THROUGH A NAT & FIREWALL"

Suppose the UAS is behind a NAT / Firewall, then how does UAC communicate 

Regards,
Praveen  
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