Registered to Interwise, but in the field it is mostly "the port next to 7777".
IANA assigns 7778 to interwise, a corporate e-learning and conferencing product, with no public protocol specification. What actually shows up on scans is the sequential neighbour effect: a host already using 7777 for a game or application server takes 7778 for a second instance, a query port, or an admin channel. The registration is not a reliable identification, so read the banner and the owning process rather than the name.
Expose with care
Identify it before opening it — when 7778 is the companion of a 7777 service it is frequently the query or admin side, which is the half you least want reachable.
$ nmap -Pn -sV -p 7777-7778 TARGETSeen this on your network? Beige Box scans your Wi-Fi and shows every open port on every device — and its Ports tool links straight back here.
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Corrections or a missing port? Reply @rimrocksystems.