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I cannot connect to my pptpd server, because it fails to send LCP: Config-Requests to my client. I found the problem, it was located in syslog

 Jan 14 03:45:38 mightyowl3 pppd[22256]: Couldn't open the /dev/ppp device: Permission denied

can someone please help me fix this...

Extra stuff:

I did

chown root
chmod 777

on it.

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What is the permission on /dev/ppp? Who owns /dev/ppp? What is the group membership of /dev/ppp? What is the username/group under which pptpd being run as?

Providing and analyzing at least this information would help you and perhaps allow us to direct you to the right place to fix this problem.

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how can I get the permissions on /dev/ppp – macintosh264 Jan 14 '12 at 4:30
ls -ll /dev/ppp from a shell window – Gianluca Jan 14 '12 at 9:32

It seems that the user running the pppd process cannot access to the device. Probably you need to add the user at least to the group of /dev/ppp

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