weird DNS logs

[K 0 <koml () strato net>]

anyone seen the following before ...? i suspect is some kind of DoS but i
have never seen it before. if anyone has seen it can you tell me what it is
and is there anyway i can prevent this. Its killing  the syslog daemone and
the named daemon every few hours.

Dec 14 14:20:14 orange named[23402]: bad referral (ULS3\\.FOUR11\\.COM !<
net)
Dec 14 14:20:14 orange last message repeated 11 times
Dec 14 14:20:14 orange named[23402]: unrelated additional info
'A.ROOT-SERVERS.net' type A from [192.203.230.10].53
Dec 14 14:20:14 orange named[23402]: unrelated additional info
'E.GTLD-SERVERS.net' type A from [192.203.230.10].53
Dec 14 14:20:14 orange named[23402]: unrelated additional info
'F.GTLD-SERVERS.net' type A from [192.203.230.10].53
Dec 14 14:20:14 orange named[23402]: unrelated additional info
'J.GTLD-SERVERS.net' type A from [192.203.230.10].53
Dec 14 14:20:14 orange named[23402]: unrelated additional info
'K.GTLD-SERVERS.net' type A from [192.203.230.10].53
Dec 14 14:20:14 orange named[23402]: unrelated additional info
'A.GTLD-SERVERS.net' type A from [192.203.230.10].53
Dec 14 14:20:14 orange named[23402]: unrelated additional info
'M.GTLD-SERVERS.net' type A from [192.203.230.10].53
Dec 14 14:20:14 orange named[23402]: unrelated additional info
'G.GTLD-SERVERS.net' type A from [192.203.230.10].53
Dec 14 14:20:14 orange named[23402]: unrelated additional info
'C.GTLD-SERVERS.net' type A from [192.203.230.10].53
Dec 14 14:20:14 orange named[23402]: unrelated additional info
'I.GTLD-SERVERS.net' type A from [192.203.230.10].53
Dec 14 14:20:14 orange named[23402]: unrelated additional info
'B.GTLD-SERVERS.net' type A from [192.203.230.10].53
Dec 14 14:20:14 orange named[23402]: unrelated additional info
'D.GTLD-SERVERS.net' type A from [192.203.230.10].53
Dec 14 14:20:14 orange sshd[23446]: log: Password authentication for sysadm
accepted.
Dec 14 14:20:14 orange named[23402]: bad referral (ULS3\\.FOUR11\\.COM !<
NET)
Dec 14 14:20:14 orange last message repeated 11 times