2008-11-26

how to check if your mail server on the spam black list

http://spamlinks.net/filter-dnsbl-lookup.htm#general-sites


http://www.emailtools.co.uk/tips/blacklists.htm


Check email black list tool
http://www.emailtools.co.uk/tools/blacklistcheck.htm
http://openrbl.org/query?i=xxx.xxx.xx.xxx
http://dnsbl.njabl.org/cgi-bin/lookup.cgi?query=xxx.xxx.xxx.xxx
http://www.junkemailfilter.com
http://www.mxtoolbox.com/blacklists.aspx


Check exchange server smtp log:
http://www.msexchange.org/tutorials/Logging_the_SMTP_Service.html

Stop Spam From the Inside by Locking Down SMTP:
http://technet.microsoft.com/en-au/magazine/cc161029.aspx

2008-11-24

troubleshooting computer browser problem

You are experience one of the following errors:
1. Got error when run netdiag on a DC:
DC list test . . . . . . . . . . . : Failed
Failed to enumerate DCs by using the browser. [ERROR_NO_BROWSER_SERVERS_
FOUND]

2. Got "conflict" netbios info when run "nbtstat -n

3. Got error when run "browstat status":
Status for domain LGSYDNEY on transport \Device\NetBT_Tcpip_{6F7C3E8B-4519-4BA6-
AF4B-B4BB15621181}
Browsing is NOT active on domain. Status : 6118
Master browser name is held by: SSFILE01
Master browser is running build 3790
Status for domain LGSYDNEY on transport \Device\NetBT_Tcpip_{1DB6AA0C-F123-4B47-
9B57-E2DC1530C31C}
Browsing is NOT active on domain. Status : 6118
Master name cannot be determined from GetAdapterStatus.

4. Error from the event log:
Event Type: Error
Event Source: Server
Event ID: 2505
Description:
The server could not bind to the transport \Device\NetBT_Tcpip_{E57CCD50-5575-4191-B19A-4D1C8083D98A} because another computer on the network has the same name. The server could not start.

5. Event Type: Warning
Event Source: MRxSmb
Event ID: 3033
Description:
The redirector was unable to register the address for transport NetBT_Tcpip_{E57CCD50-5575-4191-B19A-4D1C8083D98A} for the following reason: You were not connected because a duplicate name exists on the network. Go to System in Control Panel to change the computer name and try again. . Transport has been taken offline.

This problem typically caused by RAS running on a domain controller with DNS and WINS running it.
http://support.microsoft.com/kb/292822

Other reference articles:
http://support.microsoft.com/kb/135404
http://support.microsoft.com/default.aspx?scid=kb;en-us;818092

2008-11-05

Troubleshooting Kerberos Authentication problems – Name resolution issues

Troubleshooting Kerberos Authentication problems – Name resolution issues

http://blogs.technet.com/askds/archive/2008/05/14/troubleshooting-kerberos-authentication-problems-name-resolution-issues.aspx

PPTP VPN tracing

Problem: user cannot connect to the PPTP VPN server. Error message showing in system log of the VPN server:
"The user hasconnected and failed to authenticate on port VPN3-127. The line has beendisconnected."
Troubleshooting:
To enable RAS tracing on the VPN server: run " netsh ras set tr * en"
It will create a new folder: c:\windows\tracing
Then check the iassam log file from %windir%\tracing folder

To disable RAS tracing : netsh ras set tr * di