Solved

Windows NLB - Hide real server IP

Posted on 2014-02-02
5
324 Views
Last Modified: 2014-02-04
Hi,
We are running Windows NLB 2008R2 on 2 members with Exchange HUB roles installed.
We found out that some email servers are rejecting the outgoing traffic because they see the real server IP instead of the NLB IP.
How can I change that so the outgoing traffic will be routed only on the NLB so the external servers will see the NLB only?
0
Comment
Question by:webox_suuport
[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
5 Comments
 
LVL 51

Accepted Solution

by:
Netman66 earned 500 total points
ID: 39828499
You can use NLB for incoming but both hub servers need to be in the outbound connection.  Therefore both hubs need mx records with the ISP.

Have a read through this:

http://social.technet.microsoft.com/Forums/exchange/en-US/4e7d7026-0d1f-4b4c-bdfa-d55b3629de92/exchange-2010-nlb-ip-for-hub?forum=exchangesvrdeploylegacy
0
 
LVL 37

Expert Comment

by:Jian An Lim
ID: 39828654
hmm.. do you have a sample email about the reject email?
0
 
LVL 42

Expert Comment

by:kevinhsieh
ID: 39829924
NLB only works for inbound connections. That is why you see outbound SMTP coming from the individual server IP and not the cluster address.
0
 

Author Comment

by:webox_suuport
ID: 39832035
Hi,

I can see in the queue the following error:
client host rejected cannot find your hostname, [82.80.251.38]

I have PTR for this record but still cannot email some clients.
0
 
LVL 37

Expert Comment

by:Jian An Lim
ID: 39833925
you need to start a new question as the answer has accepted.
0

Featured Post

Ransomware: The New Cyber Threat & How to Stop It

This infographic explains ransomware, type of malware that blocks access to your files or your systems and holds them hostage until a ransom is paid. It also examines the different types of ransomware and explains what you can do to thwart this sinister online threat.  

Question has a verified solution.

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

A procedure for exporting installed hotfix details of remote computers using powershell
For anyone that has accidentally used newSID with Server 2008 R2 (like I did) and hasn't been able to get the server running again because you were unlucky (as I was) and had no backups - I was able to get things working by doing a Registry Hive rec…
This tutorial will show how to configure a single USB drive with a separate folder for each day of the week. This will allow each of the backups to be kept separate preventing the previous day’s backup from being overwritten. The USB drive must be s…
This tutorial will walk an individual through setting the global and backup job media overwrite and protection periods in Backup Exec 2012. Log onto the Backup Exec Central Administration Server. Examine the services. If all or most of them are stop…
Suggested Courses

626 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