Ben Langhinrichs

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

Mon 25 May 2009, 09:42 PM

by Ben Langhinrichs
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

Copyright © 2009 Genii Software Ltd.

What has been said:

838.1. 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.

838.2. 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

838.3. Scott Marchione
(10/20/2010 04:53 PM)

I know this is quite old, but I just ran across this issue myself, however my scenerio seems to be different than what has been outlined here. In my case it seems that IIS running on the 2003 server grabbed port 80 and would not allow HTTP to use it. My work around was to stop the IIS service from starting reload http.

838.4. Narender Mohan
(06/15/2011 02:13 PM)

Thanks allot for the such valuable information.

838.5. Prasad KM
(06/28/2011 10:21 AM)


Thanks for your Advise.

I was struggling to Resolve HTTP Service Error..! Now it is resolved..


Prasad KM

Tristar Energy

838.6. Thimo Jansen
(02/20/2012 07:53 AM)

Andreas, thanks for your answer. Skype was indeed the problem. Stopped it and Domino HTTP starts as normal. You can easily disable this behavious in Skype:

838.7. Bharat Kaushik
(11/17/2012 05:05 PM)

Thanks for a very useful information.

his seems to be a common problem with all Anti Virus Programs. I had the same issue with Eset NOD32. I have searched a lot with different sites, now finally I got the answer & able to solve the problem.