IPv6 Addresses causing Exchange Relay whitelists to fail

Posted by makerofthings7 on Server Fault See other posts from Server Fault or by makerofthings7
Published on 2012-06-10T22:04:35Z Indexed on 2012/06/10 22:41 UTC
Read the original article Hit count: 261

Filed under:

exchange-2010

|

routing

|

IPv6

|

microsoft-smtp

Several of our new Exchange servers are failing to relay messages because it is communicating over IPv6 and not matching any receive connector I previously set up. I'm not sure how we are using IP6 since we only have a IPv4 network and we are routing across subnets.

I discovered this by typing helo in from the source to the server that is confused by my IP6 address. I saw the IPv6 message and the custom message I gave this receive connector. (connectors with more permission have a different helo)

220 HUB01 client
helo asdf
250 HUB01.nfp.com Hello [fe80::cd8:6087:7b1e:99d4%11]

More info about my environment:

I have two dedicated Exchange forests each with a distinct purpose. They have no trust and only communicate by SMTP. They both share the same DNS infrastructure via stub zones.

What are my options? This is my guess, but I'm no IPv6 expert so I don't know which one is the best option

Disable IPv6
Add the IPv6 address to the whitelist (isn't that IP dynamic?)
Tell Exchange to use IPv4 instead
Figure out why we are using IPv6 instead of IP4

© Server Fault or respective owner

Related posts about exchange-2010

Exchange 2010 to Exchange 2010 Public Folder Replication

as seen on Server Fault - Search for 'Server Fault'
We have 2 exchange servers in our org. MX1 and MX2. I'm trying to replicate all MX1 public folders to MX2. I've setup replication for all the toplevel folders to include the MX2 server. However no public folders are being replicated. The event log does not show any errors. I've set the diagnostic… >>> More
when using exchange 2010 it complains of not talking to Information Store service on exchange 2007

as seen on Server Fault - Search for 'Server Fault'
I am attempting to do an upgrade in my org from exchange 2007 to exchange 2010. I moved all the mailboxes and made sure my certificates were setup in exchange 2010. I then changed my ip forwarding rules to forward mail to my exchange 2010 box. I can receive email. I then powered off my exchange 2007… >>> More
wildcard ssl certificate - exchange 2010 - POP/IMAP problem

as seen on Server Fault - Search for 'Server Fault'
previously we have requested a wildcard ssl certificate from godaddy for our major domain. one of the reasons was the new established exchange server 2010. usually you require following names included in certificiate: FQDN (e.g. mail.whatever.com) Hostname (mail) Domain name (whatever.com) Autodiscover… >>> More
Dual Exchange 2010 on different VM + single public IP + multiple domains

as seen on Server Fault - Search for 'Server Fault'
Here is the scenario: I have 2 Exchange Server 2010 on 2 different Virtual Machines, created by and based on Hyper-V. They have IP and domain: 192.168.5.11, domainA.com ; and 192.168.5.12, domainB.com respectively. The problem is, I only have 1 public IP, say 123.123.1.1 . How do I configure the… >>> More
Exchange 2007 to Exchange 2010

as seen on Server Fault - Search for 'Server Fault'
Hi all, I have a server with Exchange 2007 installed and I want to move over to Exchange 2010, I want to install Exchange 2010 onto a new server, what is the best way of moving all mailboxes and config over to the new Exchange 2010 server? Both would be on the same LAN in the same domain. I've yet… >>> More

Related posts about routing

Issue with Url Routing(System.Web.Routing) 3.5 in Godaddy...(non-MVC App)

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I am using System.Web.Routing namespace in Asp.Net 3.5 non-mvc app. Its working perfect in local machine but I tried deploying in godaddy server it doesnt work Does anyone has experiece with them ? Thanks in Advance.. Deepu >>> More
cakephp routing problem, plugin routing works but not others

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm having a strange routing problem with a site I just uploaded, and I've made a number of changes to test what's happening. It doesn't make any sense. My setup is: - I'm using one plugin, which I've included all the routing in the routes.php file. - I've also included the routes for two other… >>> More
Routing in php vs routing in rails..

as seen on Stack Overflow - Search for 'Stack Overflow'
I was working on php from past 1 yr and now a days i m learning rails. In rails:-- Routing takes an incoming URL and decodes it into a set of parameters that are used by Rails to dispatch to the appropriate controller and action for example rs.recognize_path "/blog/show/123" {:controller=>"blog"… >>> More
Why isn't ICMP routing with iptables nat routing

as seen on Server Fault - Search for 'Server Fault'
I'm using iptables on Ubuntu server to route a public IP to a private IP. I want to nat all traffic, including 80, 443 and ICMP. However, it appears that ICMP isn't routing. I have a steady ping going to the public IP and it never stops, even with NAT pointing to a bogus IP. Here are the rules… >>> More
An Introduction to ASP.NET Web API

as seen on West-Wind - Search for 'West-Wind'
Microsoft recently released ASP.NET MVC 4.0 and .NET 4.5 and along with it, the brand spanking new ASP.NET Web API. Web API is an exciting new addition to the ASP.NET stack that provides a new, well-designed HTTP framework for creating REST and AJAX APIs (API is Microsoft’s new jargon for a service… >>> More