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loekf
Former Member
Message 1 of 2
‎12-05-2009 04:47 PM

McAfee firewall causes Samba connection problems & Explorer crashes (Win7)

I have Windows 7 x64 Home Premium and McAfee Internet Security incl. the firewall. I have been suffering from

major connection problems with my two QNAP NAS servers. At random times, Windows Explorer would just

hang and only a reboot would help.

I tried:

- Temporarily disabling the firewall.

- Open ports 137-139 + 445.

- Remove any shell extensions (a well known reason for Windows Explorer crashes)

I modified the authentication settings for SAMBA connections due to the default usage of NTLM v2 by Windows 7.

As I mentioned, I can connect to the NAS, but after a while (random, varies between a few minutes to few

hours) Windows Explorer crashes/hangs and is not responding anymore.

Competitors' products like Kaspersky or ZoneAlarm shows the same behaviour.

Current solution is to use the Windows 7 firewall, which works perfectly.

EDIT: the Windows 7 firewall ONLY works if the autodisconnect setting in the registry is set to 0xFFFF (maximum value).
If you leave it to the default value of 0xF (15) with the Windows 7 firewall, Explorer also crashes. The McAfee firewall

crashes ALWAYS, regardless of the autodisconnect setting.

Message was edited by: loekf on 12/5/09 6:47:54 PM CST

Message was edited by: loekf on 12/5/09 6:48:36 PM CST

Message was edited by: loekf on 12/6/09 3:55:29 AM CST
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1 Reply
Mohan
McAfee Employee
McAfee Employee
Message 2 of 2
‎12-10-2009 02:29 PM

Re: McAfee firewall causes Samba connection problems & Explorer crashes (Win7)

Hi,

McAfee Firewall depends on the Windows Firewall service and need to active for McAfee Firewall to work on Windows 7.So until the problem with Win Firewall is resolved you might experince the problem. If you disable the windows firewall service you need to stop McAfee Firewall service before that.

Regards,

Mohan.B

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