This is the micro-site of, an open and freely-available STUN server.

Anyone is welcome to use the STUN server that can be found at We intend to leave this STUN server up permanently using this domain name. However, do not hardwire the name "" into any STUN client software delivered to users; instead, give it as as suggested name.

At this moment, we have a single STUN server running the open-source stund server software. The server resides at in Durham, NH, USA, and is not behind a NAT of any kind.

The STUN server is supported by the UNH InterOperability Laboratory.