Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

DNS errors

Posted on 2010-11-16
10
Medium Priority
?
884 Views
Last Modified: 2012-08-13
Hi,
Am am getting a ton of informational entries and warnings in the DNS log which is filling it up every couple of days generating an Eventlog Service message stating, "The DNS server log is full".  The messages in the log are as follows:

Warning:  The DNS server has encountered numerous run-time events. To determine the initial cause of these run-time events, examine the DNS server event log entries that precede this event. To prevent the DNS server from filling the event log too quickly, subsequent events with Event IDs higher than 3000 will be suppressed until events are no longer being generated at a high rate.

Information:  The DNS server encountered an invalid domain name in a packet from 68.87.77.130. The packet will be rejected. The event data contains the DNS packet.

The warnings occur a couple times per hour and the information alerts occur every couple seconds.  Sometimes multiple times during the same second.
0
Comment
Question by:jhill777
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 6
  • 3
10 Comments
 
LVL 34

Expert Comment

by:Paul MacDonald
ID: 34147685
Do you own 68.87.77.130?  If not, someone is probably messing with your DNS server, trying to hack it.
0
 
LVL 5

Author Comment

by:jhill777
ID: 34147745
That is a Comcast DNS server.  We just do the internal DNS.  All external is forwarded to that DNS server.  There are actually 2 diff dns servers.  I get the message above about both servers.
0
 
LVL 34

Expert Comment

by:Paul MacDonald
ID: 34147757
Interesting.  Are you allowing updates from that server?  I can't imagine why it would need to send traffic back outside of responding to forwarded requests.
0
Three Reasons Why Backup is Strategic

Backup is strategic to your business because your data is strategic to your business. Without backup, your business will fail. This white paper explains why it is vital for you to design and immediately execute a backup strategy to protect 100 percent of your data.

 
LVL 5

Author Comment

by:jhill777
ID: 34147827
No, not allowing updates.  I only have those addresses configured as forwarders.  Could it be any kind of problem related to not decommissioning a DC "properly" as it crashed and we just took it out of the mix?  This server with these messages now was the server I used the commands to take over as RID Master and Operations Master.  However, it didn't do this before when this server was on a T1 internet connection.  We switched this one over to a Comcast 20Mbps business class line.
0
 
LVL 5

Author Comment

by:jhill777
ID: 34147862
Our MDaemon mail server, another DC, is still on the T1 line, if that helps.  Could it have something to do with the MX records and reverse PTR still being on the ATT line?
0
 
LVL 34

Expert Comment

by:Paul MacDonald
ID: 34148046
Could be erroneous information being cached somewhere.  Check out this article:
http://support.microsoft.com/default.aspx?scid=kb;en-us;241352
0
 
LVL 5

Author Comment

by:jhill777
ID: 34148329
It looks like it's enabled by default on Server 2003 though.
0
 
LVL 1

Accepted Solution

by:
fred3rd earned 2000 total points
ID: 34149295
That error is telling you that a packet being received from your forwarders contain invalid information.

I would suggest  you either use another set of forwarders that are properly maintained (like Google's DNS server 8.8.8.8 and 8.8.4.4) but this will not cure the problem IF something (process or user) is asking for DNS information that doesn't make sense.

For example, if you have a user or an email server which is asking for a DNS record for "xy.com>>.com", you will get this error from your forwarders. Check your mail queues for any queued spam messages or Postmaster messages.
0
 
LVL 5

Author Comment

by:jhill777
ID: 34149772
Thanks, I'll try that first part.  My mail is on a different server, on a different line out, with different forwarders though that are specific to the AT&T T1 it accesses the internet on.
If it is, in fact, a client computer requesting DNS info for a domain that doesn't exist, it must be a virus or spyware program that is requesting every couple seconds or multiple times a minute at least.
0
 
LVL 5

Author Closing Comment

by:jhill777
ID: 34362232
Significantly reduced messages.
0

Featured Post

Simplifying Server Workload Migrations

This use case outlines the migration challenges that organizations face and how the Acronis AnyData Engine supports physical-to-physical (P2P), physical-to-virtual (P2V), virtual to physical (V2P), and cross-virtual (V2V) migration scenarios to address these challenges.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

I've always wanted to allow a user to have a printer no matter where they login. The steps below will show you how to achieve just that. In this Article I'll show how to deploy printers automatically with group policy and then using security fil…
If you have a multi-homed DNS setup in windows, you can have issues with connectivity to the server that hosts the DNS services (or even member servers of your domain if this same DNS server is a DC). This is because windows registers all of its IPs…
In this video, Percona Director of Solution Engineering Jon Tobin discusses the function and features of Percona Server for MongoDB. How Percona can help Percona can help you determine if Percona Server for MongoDB is the right solution for …
We’ve all felt that sense of false security before—locking down external access to a database or component and feeling like we’ve done all we need to do to secure company data. But that feeling is fleeting. Attacks these days can happen in many w…

660 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question