Protocol Filtering is blocking legitimate website

I am unable to access this website with Firefox
http://www.confickerworkinggroup.org/infection_test/cfeyechart.html

However, if I tick Firefox in the excluded applications list of Protocol Filtering, the website comes up a treat.

I also have PRTG now set to monitor the same website, and it gets blocked unless I tick PRTG in the excluded applications list.

Interestingly, if you untick these applications in the list, they continue to work .. until a restart? until something else? or time? Hmmm.

What is very frustrating here is that there does not seem to be any logging of the protocol filtering. Or is there?

Operating system is XP Pro SP3 - NOD32 Antivirus version 4.

 

Please report this issue in the new ESET's forum https://forum.eset.com and post a screen shot of the alert you're getting.