[Okta Webinar] Learn how to a build a cloud-first strategyRegister Now

x
?
Solved

Telnet to Exchange 2010 not working

Posted on 2011-05-05
8
Medium Priority
?
596 Views
Last Modified: 2012-05-11
I'm having problems using Telnet on port 25 through a SonicWall TZ100 to connect to a 2010 Exchange Server on SBS 2011 HyperV virtualized on Core Server 2008 R2. Any ideas?
0
Comment
Question by:lineonecorp
  • 5
  • 3
8 Comments
 
LVL 42

Expert Comment

by:Paul Solovyovsky
ID: 35703379
Can you telnet from the Exchange server itself to port 25?
0
 

Author Comment

by:lineonecorp
ID: 35703442
Sorry, should have said that telnet from the LAN works fine.  Culprit appears to be the Sonicwall.
0
 
LVL 42

Expert Comment

by:Paul Solovyovsky
ID: 35703457
do you have a NAT setup? Are you using a one to tone NAT or port redirection?
0
Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 

Author Comment

by:lineonecorp
ID: 35703489
It's the standard Sonicwall NAT policy for email:  port 25 is directed to the address object of the Exchange server
0
 
LVL 42

Accepted Solution

by:
Paul Solovyovsky earned 1200 total points
ID: 35703513
Where are you trying to telnet from?  Some of the ISP don't allow port 25 due to spam artists that like to create spambots.  
0
 
LVL 42

Expert Comment

by:Paul Solovyovsky
ID: 35703548
What do the logs show?  If you don't show any logs from the source IP then it may not even be getting there
0
 

Author Comment

by:lineonecorp
ID: 35703612
Bingo.  Just checked, ISP recently disabled traffic on port 25 for residential accounts due to spam concerns.  Thanks for your insight.
0
 
LVL 42

Expert Comment

by:Paul Solovyovsky
ID: 35703677
typical.  Setup VPN and use VPN to connect to the network and then you can do anything you need.
0

Featured Post

What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

Question has a verified solution.

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

Eseutil Hard Recovery is part of exchange tool and ensures Exchange mailbox data recovery when mailbox gets corrupt due to some problem on Exchange server.
This article will help to fix the below errors for MS Exchange Server 2016 I. Certificate error "name on the security certificate is invalid or does not match the name of the site" II. Out of Office not working III. Make Internal URLs and Externa…
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…
Exchange organizations may use the Journaling Agent of the Transport Service to archive messages going through Exchange. However, if the Transport Service is integrated with some email content management application (such as an antispam), the admini…
Suggested Courses
Course of the Month19 days, 17 hours left to enroll

873 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