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PPTP Client on Ubuntu

This section will step through a manual set-up for a pptp client connection on Ubuntu.
It is assumed that you have a standard pptpd server set-up as configured per YFi Hotspot Manager set-up.

On the server

When you add a VPN Connected NAS using the Realms & Providers -> NAS Devices menu on YFi Hotspot Manager to create a NAS device, this NAS device's PPTP detail gets added to a file /etc/ppp/chap-secrets

The following shows a file with one device in it

# Secrets for authentication using CHAP
# client    server  secret          IP addresses
yfi_nas_0001 pptpd 700Secret 10.20.30.2

On the Client

We use this detail specified on the pptpd server to set up the connection on the client.
Create a file with a name to identify the connection we are about to set up. We will call it yfi_server under the /etc/ppp/peers/ directory.
Edit this file to contain the following. (We assume our pptpd server has an IP of 196.7.36.10. The /etc/ppp/options.pptp file is the default that comes with a standard install )
```
pty "pptp 196.7.36.10 --nolaunchpppd"
name yfi_nas_0001
remotename pptpd
require-mppe-128
file /etc/ppp/options.pptp
```

We still need to configure the password for this connection. Edit the /etc/ppp/chap-secrets file on the client to contain the following:

# Secrets for authentication using CHAP
# client        server  secret                  IP addresses
yfi_nas_0001 pptpd 700Secret "*"

Test it out

To make a connection you need to issue the following command on the client
```
sudo pppd call yfi_server
```

Confirm that the connection gets established. Here's the output of sudo tail -f /var/log/messages on the client:

May 31 20:37:45 dvdwalt pppd[6834]: pppd 2.4.4 started by root, uid 0
May 31 20:37:45 dvdwalt pppd[6834]: Using interface ppp0
May 31 20:37:45 dvdwalt pppd[6834]: Connect: ppp0 <--> /dev/pts/4
May 31 20:37:46 dvdwalt pppd[6834]: Warning - secret file /etc/ppp/chap-secrets has world and/or group access
May 31 20:37:46 dvdwalt pppd[6834]: CHAP authentication succeeded
May 31 20:37:46 dvdwalt pppd[6834]: MPPE 128-bit stateless compression enabled
May 31 20:37:46 dvdwalt pppd[6834]: local  IP address 10.20.30.2
May 31 20:37:46 dvdwalt pppd[6834]: remote IP address 10.20.30.1

Here's the output of sudo tail -f /var/log/messages on the server:

May 31 20:37:46 linux pppd[28508]: Plugin /usr/lib/pptpd/pptpd-logwtmp.so loaded.
May 31 20:37:46 linux pppd[28508]: pppd 2.4.4 started by root, uid 0
May 31 20:37:46 linux pppd[28508]: Using interface ppp0
May 31 20:37:46 linux pppd[28508]: Connect: ppp0 <--> /dev/pts/1
May 31 20:37:46 linux pppd[28508]: Warning - secret file /etc/ppp/chap-secrets has world and/or group access
May 31 20:37:46 linux pppd[28508]: MPPE 128-bit stateless compression enabled
May 31 20:37:46 linux pppd[28508]: local  IP address 10.20.30.1
May 31 20:37:46 linux pppd[28508]: remote IP address 10.20.30.2

Here's the output of ifconfig on the client:

ppp0      Link encap:Point-to-Point Protocol  
          inet addr:10.20.30.2  P-t-P:10.20.30.1  Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1496  Metric:1
          RX packets:6 errors:0 dropped:0 overruns:0 frame:0
          TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:3 
          RX bytes:146 (146.0 B)  TX bytes:152 (152.0 B)

Here's the output of ifconfig on the server:

ppp0      Link encap:Point-to-Point Protocol  
          inet addr:10.20.30.1  P-t-P:10.20.30.2  Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1496  Metric:1
          RX packets:6 errors:0 dropped:0 overruns:0 frame:0
          TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:3 
          RX bytes:152 (152.0 B)  TX bytes:146 (146.0 B)

You should now be able to ping between the client and the server.

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