Use of TCP/UDP 7 Echo Port in Windows?

[Anon Anon]

Hello,

I'm trying to track down an issue we're running into, and I want to make sure I'm not missing something.

According to the implementation guide for ITCM, TCP port 7 (the echo service) needs to be allowed through any firewalls between the domain manager and clients. I have client PCs that don't have the Windows Simpl TCP/IP Services enabled (which is where Windows implements low-level stuff like the echo protocol.)

Here's my question -- I've been able to do deployments, send software jobs, etc. to machines that aren't running Simple TCP/IP Services in the past. Now, we're running into some issues with being unable to force job checks remotely, etc. If you look at a network trace, when you run Software Delivery --> Activate Job Check from the DSM Explorer on a remote host, the traffic begins with a UDP Echo datagram on port 7, and it's having trouble getting a response.

So, have I run into an unforeseen requirement? Do Windows DSM/ITCM clients need to have Simple TCP/IP Services installed and enabled, or do the agents implement their own service listening on this port? What features wouldn't work if port 7 echo was disallowed?

[Shocko]

To my knowledge ITCM sends WOL traffic on UDP port 7 by default when you try and remote control a machine or deploy a job. You'd never get a response as WOL does not need one.

[Richard Little]

Hi Eric

Shocko is Correct. Software Delivery has nor requirement for port 7. The trigger will be sent via cam same as all other communication.

The port 7 traffic you are seeing is the WOL magic packet that is sent with every trigger by default.

if you are unable to trigger a jobcheck then the first thing to check is that both cam and caf can communicate using the commands

camping
caf ping

you should check both work in both directions

if camping works and caf ping does not then the issue is with caf on once or other side
if camping fails then there is an issue with cam communication between the 2 systems

If both work then you need to log a support call so we can furhter assist you.
regards

Rich