troubleshooting Question

Calyptix AE500 Firewall blocking outbound telnet?

Avatar of jonmenefee
jonmenefeeFlag for United States of America asked on
Hardware Firewalls
3 Comments1 Solution1008 ViewsLast Modified:
Hey guys

Ok, another strange problem.

I am moving all of the mailboxes from a SBS 2003 to a SBS 2008 machine.  I disabled (deleted) the SBS 2003 Outbound connector and tried to send emails through the SBS 2008 machine (oh, btw, this is all in the Microsoft Paper that tells people how to migrate from SBS 2003 to SBS 2008, this is one of the first steps in the migration).  Now, here is where things start going wrong.  Outbound emails are stuck in queue.. did a little troubleshooting and it appears that only the OLD SBS 2003 can even connect to any servers outside of my network.  Here is how I figured that out.

I ran the cmd prompt on the 2008 machine and typed in:  telnet 25  Could not connect
I ran the same command from the 2003 machine and it connects
I ran the same command from ANY other PC in the network and they cannot connect.
I ran the same command from a Laptop that only connects to the Internet... it does not connect to the AD domain, so it is not getting any policies pushed to it... and as long as I am connecting to their network I CANNOT connect to the server using the telnet command.
If I disconnect my laptop from their network and put in my Verizon card, I can telnet all day long to that SMTP server.
So, I figure the problem is the Firewall.

Soooo digging into the firewall (it is a Calyptix AE500) I cannot figure out where to allow the other machines to connect via port 25 over smtp.  I know it has to do something with the settings in there and its probably one of the best features in that if a PC from behind the firewall goes nuts and starts blasting out emails, this firewall will stop all that nonsense.

But does anyone know where I can make the change to ALLOW outbound traffic to connect to a SMTP server besides the one thats using it now?

Join the community to see this answer!
Join our exclusive community to see this answer & millions of others.
Unlock 1 Answer and 3 Comments.
Join the Community
Learn from the best

Network and collaborate with thousands of CTOs, CISOs, and IT Pros rooting for you and your success.

Andrew Hancock - VMware vExpert
See if this solution works for you by signing up for a 7 day free trial.
Unlock 1 Answer and 3 Comments.
Try for 7 days

”The time we save is the biggest benefit of E-E to our team. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange.

-Mike Kapnisakis, Warner Bros