[SOLVED] How to use openvpn or pptp vpn plugin in NetworkManager?

kcynice · 03-22-2017, 04:29 AM

I use slackware 14.2 x86_64, released at 2017/02/14.
Here, I found I can not create a openvpn or pptp vpn connection in NetworkManager. Of course I have openvpn and pptp plugins installed for NetworkManager:

Code:

bash-4.4# ls /var/log/packages/openvpn-2.4.0-x86_64-1 
/var/log/packages/openvpn-2.4.0-x86_64-1
bash-4.4# ls /var/log/packages/Network*
/var/log/packages/NetworkManager-1.6.0-x86_64-1
/var/log/packages/NetworkManager-openvpn-1.2.4-x86_64-1_SBo
/var/log/packages/NetworkManager-pptp-1.2.0-x86_64-1_SBo

And, error message in the /sys/log/messages:

Code:

Mar 20 12:21:20 darkstar NetworkManager[1150]: <info>  [1489983680.7817] audit: op="connection-add" pid=2168 uid=1000 result="fail" reason="No plugin supported adding this connection"

Any help will be very very appreciated.
Thanks.

upnort · 03-22-2017, 10:40 AM

I use a single PPTP connection. I am not a NM guru. Presuming NM is otherwise working okay with wired/wireless connections and rc.inet1.conf is not configured, a default firewall configuration will prevent the connection. Try temporarily disabling the firewall (rc.firewall stop). Another PPTP blocker is the nf_conntrack_pptp kernel module normally is not loaded by default. I have the following in my rc.local:

Code:

if [ "`ps ax | grep /usr/sbin/NetworkManager | grep -v grep`" != "" ]; then
  # Using NetworkManager.
  if [ "`/sbin/lsmod | grep nf_conntrack_pptp`" = "" ]; then
    /sbin/modprobe nf_conntrack_pptp
  fi
fi

When I first debugged the PPTP connection I would run tail -f /var/log/messages to watch the output.

After I disabled the firewall and loaded nf_conntrack_pptp NM connected to the PPTP in about 1 second.

I have failed several times trying to configure OpenVPN. I can't help with that.

v3g4n · 03-22-2017, 10:47 AM

It's kind of hard to help when you didn't give any information on how you tried to setup your vpn connection in NetworkManager. The easiest way is to import your vpn config file provided to you from your vpn provider and then enter your username and password. You can also manually enter it by looking at the vpn config file.

kcynice · 03-22-2017, 11:14 PM

Quote:

Originally Posted by upnort

I use a single PPTP connection. I am not a NM guru. Presuming NM is otherwise working okay with wired/wireless connections and rc.inet1.conf is not configured, a default firewall configuration will prevent the connection. Try temporarily disabling the firewall (rc.firewall stop). Another PPTP blocker is the nf_conntrack_pptp kernel module normally is not loaded by default. I have the following in my rc.local:

Code:

if [ "`ps ax | grep /usr/sbin/NetworkManager | grep -v grep`" != "" ]; then
  # Using NetworkManager.
  if [ "`/sbin/lsmod | grep nf_conntrack_pptp`" = "" ]; then
    /sbin/modprobe nf_conntrack_pptp
  fi
fi

When I first debugged the PPTP connection I would run tail -f /var/log/messages to watch the output.

After I disabled the firewall and loaded nf_conntrack_pptp NM connected to the PPTP in about 1 second.

I have failed several times trying to configure OpenVPN. I can't help with that.

Thanks for your help. But, I still got this failure error although I loaded this module for PPTP connection.
What's your slackware version?

kcynice · 03-22-2017, 11:17 PM

Quote:

Originally Posted by v3g4n

It's kind of hard to help when you didn't give any information on how you tried to setup your vpn connection in NetworkManager. The easiest way is to import your vpn config file provided to you from your vpn provider and then enter your username and password. You can also manually enter it by looking at the vpn config file.

Thanks for your reply. Here, for creating a PPTP connection, I do it following the connection creation dialog, only fill the needed gateway, username and password.

PROBLEMCHYLD · 03-22-2017, 11:32 PM

Quote:

Originally Posted by kcynice

Thanks for your reply. Here, for creating a PPTP connection, I do it following the connection creation dialog, only fill the needed gateway, username and password.

It should look like the screenshot and add

Code:

# PPTP
iptables -A OUTPUT -p tcp -m tcp  --dport 1723  -m state --state NEW  -j ACCEPT

to rc.firewall

kcynice · 03-23-2017, 02:21 AM

Quote:

Originally Posted by PROBLEMCHYLD

It should look like the screenshot and add

Code:

# PPTP
iptables -A OUTPUT -p tcp -m tcp  --dport 1723  -m state --state NEW  -j ACCEPT

to rc.firewall

Oh, my issue is not the network problem, just a basic software error. I don't know how and where it check the right plugin.
My error prompt were attached

ivandi · 03-23-2017, 07:47 AM

Quote:

Originally Posted by kcynice

Code:

bash-4.4# ls /var/log/packages/openvpn-2.4.0-x86_64-1 
/var/log/packages/openvpn-2.4.0-x86_64-1
bash-4.4# ls /var/log/packages/Network*
/var/log/packages/NetworkManager-1.6.0-x86_64-1
/var/log/packages/NetworkManager-openvpn-1.2.4-x86_64-1_SBo
/var/log/packages/NetworkManager-pptp-1.2.0-x86_64-1_SBo

I don't see pptp installed. NetworkManager-pptp requires it to actually make a connection.

Cheers

PROBLEMCHYLD · 03-23-2017, 10:22 AM

You need these packages to get VPN working. If you want to use older versions it should be fine. I'm using 14.2 stable with those packages and have no problem connecting.

networkmanager-pptp-1.2.4-i586-1.txz
pptp-1.9.0-i586-1.txz

v3g4n · 03-23-2017, 11:20 AM

I didn't need to install any pptp packages to get my vpn to work. I only installed NetworkManager-openvpn, but I am using openvpn and not pptp.
https://slackbuilds.org/repository/1...nager-openvpn/

upnort · 03-23-2017, 11:22 AM

Quote:

Thanks for your help. But, I still got this failure error although I loaded this module for PPTP connection.
What's your slackware version?

14.2 64-bit. I started using the PPTP VPN with 14.1.

kcynice · 03-24-2017, 04:20 AM

Quote:

Originally Posted by ivandi

I don't see pptp installed. NetworkManager-pptp requires it to actually make a connection.

Cheers

Oh, it will report the same error even if I had pptp installed

kcynice · 03-24-2017, 04:23 AM

Quote:

Originally Posted by PROBLEMCHYLD

You need these packages to get VPN working. If you want to use older versions it should be fine. I'm using 14.2 stable with those packages and have no problem connecting.

networkmanager-pptp-1.2.4-i586-1.txz
pptp-1.9.0-i586-1.txz

but i have networkmakager-pptp-1.2.0 and pptp 1.8.0 installed, which report the above error(no plugin)

kcynice · 03-24-2017, 05:10 AM

Thanks all, I found its because the basic nm software.
I upgread NetworkManager-1.6.0 to NetworkManager-1.6.2, the issue was resolved.