We are getting about 15 warnings in a row of this same event (5504) every 30\nminutes. We are getting these warnings in both our dc1 and dc2. We are\nrunning Windows 2000 with SP4 on both machines. I've been reading a lot of\nposts on this event and some say to ignore it and others say to "enable"\n"disable" forwarders. Currently we have forwarders turned off on both\nservers. From what other people have said, if they turn on forwarders they\nstill get these warnings but not as frequently. All the errors are coming\nfrom root servers. I have checked for any servers with illegal characters\n(&*$, etc) and they all seem to be valid. What are some things that I could\nchange or look into to fix this problem? Any suggestions would be\nappreciated.\n\n\n\nDan\n\n\n\n\n\n\n\nEvent Type: Warning\n\nEvent Source: DNS\n\nEvent Category: None\n\nEvent ID: 5504\n\nDate: 11/3/2004\n\nTime: 2:59:44 AM\n\nUser: N/A\n\nComputer: CQL-GR-DC2\n\nDescription:\n\nThe DNS server encountered an invalid domain name in a packet from\n18.104.22.168. The packet is rejected.