Error connect to server

newFreeBSD · 05-19-2011, 11:26 PM

Hi,

I setup PPTP server on Ubuntu 9.10. When i connect from user, i got error.

This is from /var/log/syslog

Code:

May 20 12:21:14 vpn01 pptpd[7571]: CTRL: Client 202.75.4.xxx control connection started
May 20 12:21:15 vpn01 pptpd[7571]: CTRL: Starting call (launching pppd, opening GRE)
May 20 12:21:15 vpn01 pppd[7572]: Plugin /usr/lib/pptpd/pptpd-logwtmp.so loaded.
May 20 12:21:15 vpn01 pppd[7572]: Couldn't open the /dev/ppp device: Permission denied
May 20 12:21:31 vpn01 pptpd[7571]: CTRL: Reaping child PPP[7572]

iptables -L

Code:

root@vpn01:~# iptables -L
Chain INPUT (policy ACCEPT)
target     prot opt source               destination

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination
root@vpn01:~#

http://imageshack.us/photo/my-images/854/pic1d.png/

Please assist me.

carltm · 05-21-2011, 07:40 AM

The answer is in the middle of your log entries.

Quote:

Originally Posted by newFreeBSD

May 20 12:21:15 vpn01 pppd[7572]: Couldn't open the /dev/ppp device: Permission denied

This is saying that the pppd process doesn't have permission to open
/dev/ppp. Here are a couple of commands to find what the permissions
are and what user is running pppd.

Code:

ls -l /dev/ppp
ps aux | grep "[p]ppd

newFreeBSD · 05-23-2011, 08:00 PM

Code:

root@vpn01:~# ls -l /dev/ppp
crw-r--r-- 1 root root 108, 0 May 13 11:25 /dev/ppp
root@vpn01:~# ps aux | grep [p]ppd
root@vpn01:~#

newFreeBSD · 05-25-2011, 12:18 AM

Any idea why? I do searching and as i seen none of them solve.

carltm · 05-25-2011, 09:19 PM

The output of the first command shows that only root can read
and write to /dev/ppp. The fact that the second command has
no output means that pppd wasn't running.

Are you trying to start pppd as root? Or are you using sudo?

Do you see anything in /var/log/messages or /var/log/syslog
after trying to start pppd?