My company has some CAD software that we give away that is written in JAVA, and we communicate with our servers across normal web protocol. Some of our clients that have Symantec End Point Protection cannot use our quoting features which send a moderately large file across the web. However when I installed Symantec Endpoint Protection on a computer I could not replicate this behavior. 

I have two questions:

  - what should I ask of a client to figure out what about their settings are causing our application to be blocked

  - is there anything wrong with using http requests if you are not a browser as far as security is concerned?

Thank you,

--Douglas Ronne

Lead Developer,

Protocase, Inc

Have you added application on Exception list ?

How to create an Application Exception in Symantec Endpoint Protection 12.1

You need to see exactly what is being blocked. Verify is they use the SEP firewall and if they disable as a test, does it function correctly. If so, you may need to add a rule to allow the traffic.

Hi,

Thank you for posting in Symantec community.  

Either create a application exception or get it white listed.

For software developers, authors, and Independent Software Vendors (ISVs), the Symantec Software White-List program offers an opportunity to have their software added to a white-list of known good software maintained by Symantec to reduce the possibility of false positives.  Please note that Symantec offers this service to reduce false positives, but cannot guarantee that false positives will not occur.  Decisions made by Symantec are also subject to change depending on a variety of factors that include but are not limited to alterations in the software, distribution of the software, or vulnerabilities in the software to misuse by the publisher or others. Symantec may also change its classification criteria and policies over time to address the constantly evolving security landscape.  To submit software to participate in this program, please submit the candidate software to Symantec using the Software White-Listing Request form.

Software White-Listing Request Form: https://submit.symantec.com/whitelist/

Note: If an application for white-listing is approved it can take a number of weeks for the software in question to be white-listed.  The applicant will be notified after the white-listing process for that software is completed.  The applicant will be notified if the application is not approved.

For Additional information on False Positives, follow the Article Links below - 

Best Practice when Symantec Endpoint Protection or Symantec AntiVirus is Detecting a File that is Believed to be Safe

http://www.symantec.com/docs/TECH98360

Restoring a false positive file detection from the Symantec Endpoint Protection quarantine

http://www.symantec.com/docs/TECH150607

About managing false positives detected by TruScan proactive threat scans

http://www.symantec.com/docs/HOWTO27058

OR

How to create an Application Exception in Symantec Endpoint Protection 12.1

http://www.symantec.com/docs/TECH203266