Another plaintext IRC port from IANA's 6665-6669 ircu block.
6668 carries exactly the same IRC protocol as 6667 and exists because IANA assigned the whole 6665-6669 range to ircu, letting a server offer several entry points. Networks bind it so clients behind a filter that blocks 6667 can still get in, and some run separate listeners per port for load or policy reasons. On a scan it means an IRC daemon, not a distinct protocol.
Expose with care
Same cleartext exposure as 6667; the TLS port is 6697 per RFC 7194.
$ printf 'QUIT\r\n' | nc -v TARGET 6668Seen 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.