According to the RIPE Whois at
www.ripe.net % This is the RIPE Database query service.
% The objects are in RPSL format.
%
% The RIPE Database is subject to Terms and Conditions.
% See http://www.ripe.net/db/support/db-terms-conditions.pdf
% Note: This output has been filtered.
% To receive output for a database update, use the "-B" flag.
% Information related to '92.62.43.0 - 92.62.43.255'
inetnum: 92.62.43.0 - 92.62.43.255
netname: NO-UNDERWORLD
descr: Underworld IRC services Trondheim, Norway
descr: IRC Infrastructure
country: NO
admin-c: UWIR-RIPE
tech-c: UWIR-RIPE
status: ASSIGNED PA "status:" definitions
mnt-by: ITSJEFEN-LIR
source: RIPE # Filtered
role: Underworld Incident Response Team
address: PB 1275 Pirsenteret
address: NO-7462 Trondheim
address: Norway
remarks: 92.62.43.77 runs the PROXYSCANNER for the Quakenet IRC Network.
remarks: It will only scan you if you connect to the IRC network.
remarks: For More Information see: http://www.quakenet.org/openproxies.html
remarks: If you were scanned by that IP and believe you do not connect to QuakeNet
remarks: - We suggest you get your system checked by a Virus/Trojan Scanner.
remarks: trouble: Our preferred contact method is e-mail!
remarks: trouble: hostmaster@underworld.no - for technical questions.
remarks: trouble: abuse@underworld.no - for abuse notifications.
abuse-mailbox: abuse@underworld.no
admin-c: HRDY-RIPE
tech-c: AKAI-RIPE
nic-hdl: UWIR-RIPE
mnt-by: ITSJEFEN-LIR
source: RIPE # Filtered
% Information related to '92.62.32.0/20AS44381'
route: 92.62.32.0/20
descr: ITsjefen networks
origin: AS44381
mnt-by: ITSJEFEN-LIR
source: RIPE # Filtered
so whoever they are, they're in Norway.
You can use your cPanel to put a block on that IP address, but it would show up in the error log (I think) instead of the access log. Are you offering any content (like a webcam) using the 6667 port?
Port 6667 UDP is used mostly by Internet Relay Chat and it's also used by Zombie PCs to communicate with a bot-master system. Not a good thing. You aren't hosting your site on your own PC are you?