Video Screencast Help
Symantec Secure Login will be live on Connect starting February 25. Get the details here.

Troubleshooting Client Communication

Created: 24 Aug 2009 • Updated: 28 Aug 2009 | 9 comments
Language Translations
P_K_'s picture
+21 23 Votes
Login to vote

Sequence of steps to be followed while troubleshooting Client Commuincation

                                                         imagebrowser image

Symantec Endpoint Protection: Troubleshooting Client/Server Connectivity

Testing Communication from an Endpoint Protection client to the Endpoint Protection Manager
Clients stop communicating with Symantec Endpoint Protection Manager (SEPM) with HTTP 401 error in Sylink log and HTTP 401.1 error in IIS log
Client is not appearing in Symantec Endpoint Protection Manager (SEPM), error: HTTP returns status code=407
How to Replace the sylink on the Client :
1.Copy of the file Sylink.xml from the server from C:\Program Files\Symantec\Symantec Endpoint Protection Manager\data\outbox\agent\
2. On the client computer , click Start > Run, type smc -stop, and click OK.
3. Copy the Sylink.xml into the C:\Program Files\Symantec\Symantec Endpoint Protection folder, and replace any existing Sylink.xml file.
4. Click Start > Run, type smc -start, and click OK.
Steps to edit the SYSTEM account proxy settings through using a Scheduled Task:
Click Start > Run
Type cmd and click OK
Type in this the following command and press Enter:
at 12:00 /INTERACTIVE "C:\Program Files\Internet Explorer\iexplore.exe"
You should receive a confirmation stating "added a new job..."
Navigate to the Control Panel and open Scheduled Tasks
Right-click the new task just created in the previous step (probably named "At1") and click Run.
This will open an Internet Explorer window that will now be running under the SYSTEM account.
Go to the Tools menu and select Internet Options
Select the Connections tab and click the LAN Settings button.
Uncheck Use a proxy server for your LAN
Click OK twice
Click Start > Run
Type  SMC -stop and click OK.
The Symantec Endpoint Protection icon should disappear from the system tray.
Click Start > Run
Type in SMC -start and click OK.
How to get Sylink log:
How to enable Sylink Debugging for Symantec Endpoint Protection (SEP) in the registry

Comments 9 CommentsJump to latest comment

AravindKM's picture

Very useful article.

Please don't forget to mark your thread solved with whatever answer helped you : ) Thanks & Regards Aravind

Login to vote
shp's picture

Thanks  Prachand...

I had all links to articles related communication but the flowchart was missing...
Its a good Article keep it up...

Srinivas H.P.
HCL Infosystems Ltd

Login to vote
marcosavelino's picture

 Very useful article

Marcos Avelino

Login to vote
OmegaApple's picture


  • http://<management server IP address>:<port used by the SEPM website>/reporting/index.php


  • http://<management server name>:9090


telnet ip address 8014




Login to vote
steffen910's picture

usefull article

Login to vote
mon_raralio's picture

Time to update this article. :D

“Your most unhappy customers are your greatest source of learning.”

Login to vote
P_K_'s picture are right..need some time. But will surely update this.

MCT MCSE-2012 Symantec Technical Specialist (SCTS)

Login to vote
NRaj's picture

good one.

Login to vote
P_K_'s picture

Updated info

MCT MCSE-2012 Symantec Technical Specialist (SCTS)

Login to vote