Solved

IPSec is blocking network traffic

Posted on 2010-08-30
2
1,619 Views
Last Modified: 2012-05-10
I have a windows 2003 Enterprise Edition x32 that after restarting stops responding on the network.

It is a domain controller that is also running Exchange 2003 Standard and one Virtual server instance.

The exact error message is "The ipsec driver has entered a Block mode.  IPSec will discard all inbound and outbound TCP/IP network traffic that is not permitted by boot-time IPSec Policy exemption."

One of the suggestions is to stop the IPSec services.  However I have a SSL certificate installed.

In addition to the ipsec error message there are 3 others that appear during the restart process all relating to the KDC service.

To fix the problem I simply do another restart and the server starts responding again and the error message goes away.

What on earth could be causing this?  Any suggestions would be appriciated.
ipsec-error.jpg
kdc-error.jpg
service-hang1.jpg
service-hang2.jpg
0
Comment
Question by:Douglas-Brouhard
2 Comments
 
LVL 39

Accepted Solution

by:
Krzysztof Pytko earned 500 total points
ID: 33557788
From eventid.net extract

"As per Microsoft: "This problem occurs because the DNS Server service is listening on the UDP port that is required by another service. This problem occurs when the MaxUserPort registry entry is present. This registry entry is located in the following subkey in the registry:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\". See M956189 for default values for MaxUserPort. "

Read those entries, maybe they will help you

http://www.eventid.net/display.asp?eventid=4292&eventno=5676&source=IPSec&phase=1
http://www.eventid.net/display.asp?eventid=20&eventno=3396&source=KDC&phase=1
http://www.eventid.net/display.asp?eventid=7022&eventno=111&source=Service%20Control%20Manager&phase=1
http://www.eventid.net/display.asp?eventid=7023&eventno=345&source=Service%20Control%20Manager&phase=1
0
 
LVL 17

Expert Comment

by:Tony Massa
ID: 33558411
0

Featured Post

NAS Cloud Backup Strategies

This article explains backup scenarios when using network storage. We review the so-called “3-2-1 strategy” and summarize the methods you can use to send NAS data to the cloud

Question has a verified solution.

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

Suggested Solutions

Marketers need statistics and metrics like everybody else needs oxygen. In this article we explain how to enable marketing campaign statistics for Microsoft Exchange mail.
This article explains in simple steps how to renew expiring Exchange Server Internal Transport Certificate.
In this Micro Video tutorial you will learn the basics about Database Availability Groups and How to configure one using a live Exchange Server Environment. The video tutorial explains the basics of the Exchange server Database Availability grou…
This video shows how to quickly and easily add an email signature for all users on Exchange 2016. The resulting signature is applied on a server level by Exchange Online. The email signature template has been downloaded from: www.mail-signatures…

810 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