Freeware download igd [1 articles found] (supplemental result)
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Freeware TekSIP
Registrar and Stateless SIP Proxy for Windows.
TekSIP also supports UPnP IGD specification. If installed behind UPnP supported Internet gateway device (ADSL router e.g.), TekSIP automatically detects if it is behind a new NAT gateway and the external IP address. All outgoing requests manipulated for NAT traversal. You do not need to add manual reverse mappings for SIP and RTP protocols.
Internet Servers - Firewall & Proxy, On November 4, 2009 updated, downloaded 256 times, file size is 1000Kb.