MacBook not connecting anywhere via VPN
Some ideas of things to try...
Look at your
/var/log/ppp.log
,/var/log/kernel.log
, and/var/log/system.log
to look for clues. Pay special attention to the message from around the time of your last boot , and also from the last time you tried to initiate a VPN connection.Enable verbose debugging of your VPN interface in System Preferences > Network > VPN > Advanced > Options > Advanced > Use verbose logging, then attempt to initiate a new PPP connection. Then check
/var/log/ppp.log
again.It's also possible this is one of the few times that Repairing Permissions actually makes a difference; for security reasons, kexts whose permissions have been set wrong are not loaded. So you might want to run Disk Utility and to a Repair Permissions of your boot volume, then possibly reboot.
Mac OS X caches kernel extensions to speed up boot time. You can trigger Mac OS X to rebuild its kext cache by changing the modification time of the Extensions folder:
sudo touch /System/Library/Extensions
...then reboot.
- I'd also look at the contents of
PPP.kext
, and compare it to a known good copy from another machine with the exact same version of Mac OS X installed. A.kext
is actually a bundle directory much like a.app
is. The real binary is inContents/MacOS/
. It might be good to check for corruption of your PPP.kext binary by comparing, say, an MD5 checksum of it with an MD5 checksum of a known working copy from the exact same version of Mac OS X.
FWIW, I'm running Mac OS X v10.6.3 (10D573) on this machine, and here's the MD5 of my PPP kext's internal binary:
$ md5 /System/Library/Extensions/PPP.kext/Contents/MacOS/PPP
MD5 (/System/Library/Extensions/PPP.kext/Contents/MacOS/PPP) = fae84adab5b1c5e63b34541f45735ae8
If a given kext fails to load, you can get more verbose debugging information by loading it manually with kextload and specifying the -v option:
sudo kextload -v /System/Library/Extensions/PPP.kext
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Toby
I am a developer who focuses mainly on web technologies. I also run a handful of websites covering a wide range of topics. One of my favourites because it annoys so many people is howoldistheinter.net where I make the distinction between www and the internet. My company specialise in Ruby development, you can hire us for a Ruby project if you like. On my site I write Ruby articles amongst other posts.
Updated on September 17, 2022Comments
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Toby almost 2 years
I was wondering if someone could help me troubleshoot this issue.
I have a handful of VPNs set up on my MacBook (Snow Leopard) which I know are working, but today when I tried to use them I get the following error in all cases:
could not find the PPP kernel extension
I have not needed to use any VPN for a while but they have worked in the past and there is nothing I can think of that I have changed on this machine.
I have looked in System/Library/Extensions and PPP.kext is there which is the file I thought it would be looking for?
Any help would be greatly appreciated.
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John Fultz about 12 yearsI just experienced the identical problem...probably provoked by a forced hard reboot after MacOS dropping its Bluetooth connections (again). The problem appeared immediately after reboot. The `sudo touch /System/Library/Extensions' did the trick.