Ben Langhinrichs

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Solution to 'Cannot bind port 80' error caused by AVG

Mon 25 May 2009, 09:42 PM


On Friday, I was mystified to find that the test Domino 8.5 server on my laptop was ging an error when trying to load HTTP.  The error was:

HTTP Server: Error - Unable to Bind port 80, port may be in use or user needs net_privaddr privilege

and it seemed to have appeared out of nowhere.  Fortunately, I got a clue when I googled and saw this post, reporting the same problem.  I don't have Skype on this machine, but when I checked, AVG had been updated to 8.5.  It took a bit of poking around, but I found the setting I need to change to eliminate the problem with AVG 8.5.  In the hope that this will save somebody else from pulling their hair out (like we need more balding Notes gurus!), here is the key to fixing the problem:

In AVG 8,5, under Tools - Advanced Settings, expand the Web Shield section, click on Web Protection, and remove 80 from the list of Ports to be scanned.


Advanced AVG settings

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What has been said:

837.1. Ulrich Krause (26.05.2009 05:39)

This seems to be a common problem with all Anti Virus Programs. I had the same issue with Eset NOD32.

Instead of removing port 80 from the scan list, I temporarily disable the web scan and after the HTTP task has started, I enable this option again.

Seems to be a more secure way of working around the issue than generally disable any scan on port 80.

837.2. Andreas Rosen (29.05.2009 09:46)

I had a simular problem with the newer Skype using now by default also port 80. I did not get the error during start of Http - I just did not get any answer from the local domino server via http.

solution: stop skype during test - or change the skype configuration

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