VPN PPTP no Ubuntu 16.04 não está funcionando?

Question

Eu preencho os detalhes como em esta resposta. Mas quando tento me conectar, fico:

VPN Connection Failed '...because the VPN service stopped'

mensagem de erro no canto superior direito da tela:

executando

tail -f /var/log/syslog

me dá isso:

Mar  9 21:34:20 me NetworkManager[6063]: ** Message: pppd started with pid 8330
Mar  9 21:34:20 me NetworkManager[6063]: <info>  [1489091660.9205] vpn-connection[0x1e067e0,54552dfa-6db2-4050-8b47-fd108b79f201,"VPN connection 1",0]: VPN plugin: state changed: starting (3)
Mar  9 21:34:20 me pppd[8330]: Plugin /usr/lib/pppd/2.4.7/nm-pptp-pppd-plugin.so loaded.
Mar  9 21:34:20 me NetworkManager[6063]: Plugin /usr/lib/pppd/2.4.7/nm-pptp-pppd-plugin.so loaded.
Mar  9 21:34:20 me NetworkManager[6063]: ** Message: nm-pptp-ppp-plugin: (plugin_init): initializing
Mar  9 21:34:20 me pppd[8330]: pppd 2.4.7 started by root, uid 0
Mar  9 21:34:20 me NetworkManager[6063]: ** Message: nm-pptp-ppp-plugin: (nm_phasechange): status 3 / phase 'serial connection'
Mar  9 21:34:20 me pppd[8330]: Using interface ppp0
Mar  9 21:34:20 me NetworkManager[6063]: Using interface ppp0
Mar  9 21:34:20 me NetworkManager[6063]: Connect: ppp0 <--> /dev/pts/19
Mar  9 21:34:20 me NetworkManager[6063]: ** Message: nm-pptp-ppp-plugin: (nm_phasechange): status 5 / phase 'establish'
Mar  9 21:34:20 me NetworkManager[6063]: nm_device_get_device_type: assertion 'NM_IS_DEVICE (self)' failed
Mar  9 21:34:20 me pppd[8330]: Connect: ppp0 <--> /dev/pts/19
Mar  9 21:34:20 me NetworkManager[6063]: <info>  [1489091660.9369] manager: (ppp0): new Generic device (/org/freedesktop/NetworkManager/Devices/6)
Mar  9 21:34:20 me pptp[8335]: nm-pptp-service-8312 log[main:pptp.c:350]: The synchronous pptp option is NOT activated
Mar  9 21:34:20 me NetworkManager[6063]: <info>  [1489091660.9505] devices added (path: /sys/devices/virtual/net/ppp0, iface: ppp0)
Mar  9 21:34:20 me NetworkManager[6063]: <info>  [1489091660.9506] device added (path: /sys/devices/virtual/net/ppp0, iface: ppp0): no ifupdown configuration found.
Mar  9 21:34:20 me pptp[8347]: nm-pptp-service-8312 log[ctrlp_rep:pptp_ctrl.c:259]: Sent control packet type is 1 'Start-Control-Connection-Request'
Mar  9 21:34:20 me pptp[8347]: nm-pptp-service-8312 log[ctrlp_disp:pptp_ctrl.c:781]: Received Start Control Connection Reply
Mar  9 21:34:20 me pptp[8347]: nm-pptp-service-8312 log[ctrlp_disp:pptp_ctrl.c:815]: Client connection established.
Mar  9 21:34:21 me pptp[8347]: nm-pptp-service-8312 log[ctrlp_rep:pptp_ctrl.c:259]: Sent control packet type is 7 'Outgoing-Call-Request'
Mar  9 21:34:21 me pptp[8347]: nm-pptp-service-8312 log[ctrlp_disp:pptp_ctrl.c:900]: Received Outgoing Call Reply.
Mar  9 21:34:21 me pptp[8347]: nm-pptp-service-8312 log[ctrlp_disp:pptp_ctrl.c:939]: Outgoing call established (call ID 34527, peer's call ID 32815).
Mar  9 21:34:51 me pppd[8330]: LCP: timeout sending Config-Requests
Mar  9 21:34:51 me NetworkManager[6063]: LCP: timeout sending Config-Requests
Mar  9 21:34:51 me NetworkManager[6063]: ** Message: nm-pptp-ppp-plugin: (nm_phasechange): status 11 / phase 'disconnect'
Mar  9 21:34:51 me NetworkManager[6063]: Connection terminated.
Mar  9 21:34:51 me pppd[8330]: Connection terminated.
Mar  9 21:34:51 me NetworkManager[6063]: ** Message: Terminated ppp daemon with PID 8330.
Mar  9 21:34:51 me NetworkManager[6063]: <warn>  [1489091691.9659] vpn-connection[0x1e067e0,54552dfa-6db2-4050-8b47-fd108b79f201,"VPN connection 1",0]: VPN plugin: failed: connect-failed (1)
Mar  9 21:34:51 me NetworkManager[6063]: <info>  [1489091691.9661] vpn-connection[0x1e067e0,54552dfa-6db2-4050-8b47-fd108b79f201,"VPN connection 1",0]: VPN plugin: state changed: stopping (5)
Mar  9 21:34:51 me NetworkManager[6063]: <error> [1489091691.9681] platform-linux: do-change-link[13]: failure changing link: failure 19 (No such device)
Mar  9 21:34:51 me NetworkManager[6063]: <warn>  [1489091691.9682] device (ppp0): failed to disable userspace IPv6LL address handling
Mar  9 21:34:51 me NetworkManager[6063]: <info>  [1489091691.9693] vpn-connection[0x1e067e0,54552dfa-6db2-4050-8b47-fd108b79f201,"VPN connection 1",0]: VPN plugin: state changed: stopped (6)
Mar  9 21:34:51 me NetworkManager[6063]: <info>  [1489091691.9710] vpn-connection[0x1e067e0,54552dfa-6db2-4050-8b47-fd108b79f201,"VPN connection 1",0]: VPN plugin: state change reason: unknown (0)
Mar  9 21:34:51 me NetworkManager[6063]: <info>  [1489091691.9719] vpn-connection[0x1e067e0,54552dfa-6db2-4050-8b47-fd108b79f201,"VPN connection 1",0]: VPN service disappeared
Mar  9 21:34:51 me NetworkManager[6063]: <info>  [1489091691.9727] devices removed (path: /sys/devices/virtual/net/ppp0, iface: ppp0)
Mar  9 21:34:51 me NetworkManager[6063]: ** Message: nm-pptp-ppp-plugin: (nm_phasechange): status 1 / phase 'dead'
Mar  9 21:34:51 me NetworkManager[6063]: Terminating on signal 15
Mar  9 21:34:51 me NetworkManager[6063]: Child process /usr/sbin/pptp 217.145.41.15 --nolaunchpppd --loglevel 0 --logstring nm-pptp-service-8312 (pid 8333) terminated with signal 15
Mar  9 21:34:51 me NetworkManager[6063]: Modem hangup
Mar  9 21:34:51 me NetworkManager[6063]: ** Message: nm-pptp-ppp-plugin: (nm_exit_notify): cleaning up
Mar  9 21:34:51 me pptp[8335]: nm-pptp-service-8312 warn[decaps_hdlc:pptp_gre.c:220]: short read (-1): Input/output error
Mar  9 21:34:51 me pptp[8335]: nm-pptp-service-8312 warn[decaps_hdlc:pptp_gre.c:232]: pppd may have shutdown, see pppd log
Mar  9 21:34:51 me pppd[8330]: Terminating on signal 15
Mar  9 21:34:51 me pppd[8330]: Child process /usr/sbin/pptp 217.145.41.15 --nolaunchpppd --loglevel 0 --logstring nm-pptp-service-8312 (pid 8333) terminated with signal 15
Mar  9 21:34:51 me pppd[8330]: Modem hangup
Mar  9 21:34:51 me pptp[8347]: nm-pptp-service-8312 log[callmgr_main:pptp_callmgr.c:245]: Closing connection (unhandled)
Mar  9 21:34:51 me pptp[8347]: nm-pptp-service-8312 log[ctrlp_rep:pptp_ctrl.c:259]: Sent control packet type is 12 'Call-Clear-Request'
Mar  9 21:34:51 me pptp[8347]: nm-pptp-service-8312 log[call_callback:pptp_callmgr.c:84]: Closing connection (call state)
Mar  9 21:34:51 me pppd[8330]: Exit.

    

Answer 1

Você pode configurar o servidor VPN pptp e o cliente a partir do terminal usando estas etapas:

Configuração do servidor VPN:

Instale e atualize o servidor VPN e os pacotes do cliente:

$ sudo apt-get install pptpd ppp pptp-linux

Quatro arquivos precisam ser configurados para o servidor:

• /etc/pptpd.conf
• / etc / ppp / pptpd-options
• / etc / ppp / options
• / etc / chat-secrets)

/etc/pptpd.conf:

option /etc/ppp/pptpd-options
logwtmp
localip 192.168.23.20
remoteip 192.168.23.30-39

/ etc / ppp / pptpd-options:

name pptpd
refuse-pap
refuse-chap
refuse-mschap
require-mschap-v2
require-mppe-128
proxyarp
nodefaultroute
lock
nobsdcomp
noipx ## you don’t need IPX
mtu 1490 ## may help your linux client from disconnecting
mru 1490 ## may help your linux client from disconnecting

/ etc / ppp / options:

lock

/ etc / ppp / chap-secrets:

# Secrets for authentication using CHAP
# client    server  secret  IP addresses

[username]  pptpd [userpass] *

(O [nome de usuário] e [userpass] são entradas sem os colchetes.)

Agora reinicie o servidor com:

$ sudo service pptpd restart

Configuração do cliente VPN:

Quatro arquivos de configuração estão envolvidos:

• / etc / ppp / peers / myvpn
• /etc/ppp/options.pptp
• / etc / ppp / chap-secrets
• /etc/ppp/ip-up.local

/ etc / ppp / peers / myvpn:

# replace the bracket paramters with the host name of the VPN server and VPN user
remotename myvpn
linkname myvpn
ipparam myvpn
pty "pptp [vpn server] --nolaunchpppd "
name [username]
usepeerdns
require-mppe
refuse-eap
noauth

# adopt defaults from the pptp-linux package
file /etc/ppp/options.pptp

/etc/ppp/options.pptp:

lock
noauth
refuse-pap
refuse-eap
refuse-chap
refuse-mschap
nobsdcomp
nodeflate

/ etc / ppp / chap-secrets:

# Secrets for authentication using CHAP
# client    server  secret  IP addresses
username myvpn password *

/etc/ppp/ip-up.local:

#!/bin/sh
network='echo $IPREMOTE | awk -F\. '{print ".""."".0/24"}''
route add -net $network $IFNAME

Conecte o cliente VPN com:

$ sudo pon myvpn

Terminar a ligação VPN com:

$ sudo poff myvpn

    

Answer 2

Modificado da solução @ L.D.James

Ubuntu 16.04

Configuração do cliente VPN:

Quatro arquivos de configuração estão envolvidos:

• / etc / ppp / peers / myvpn
• /etc/ppp/options.pptp
• / etc / ppp / chap-secrets
• /etc/ppp/ip-up.local

/ etc / ppp / peers / myvpn:

# replace the bracket paramters with the host name of the VPN server and VPN user
remotename myvpn
linkname myvpn
ipparam myvpn
pty "pptp 1.2.3.4 --nolaunchpppd --loglevel 0"
lock
nodeflate
name LoginName 
usepeerdns
require-mppe
noauth
require-mppe-128

1. Altere 1.2.3.4 para o seu endereço IP do host da VPN. e
2. Altere LoginName para seu nome de login

/etc/ppp/options.pptp:

lock
noauth
refuse-pap
refuse-eap
refuse-chap
refuse-mschap
nobsdcomp
nodeflate
name LoginName
require-mppe-128
ipparam myvpn

3. Altere LoginName para seu nome de login

/ etc / ppp / chap-secrets:

# Secrets for authentication using CHAP
# client    server  secret  IP addresses
LoginName myvpn LoginPassword *

4. Altere LoginName para seu nome de login
5. Altere LoginPassword para sua senha de login

/etc/ppp/ip-up.local:

#!/bin/sh
network='echo $IPREMOTE | awk -F\. '{print ".""."".0/24"}''
route add -net $network $IFNAME

Inicie o cliente VPN com:

$ sudo pon vicomvpn dump logfd 2 nodetach
pppd options in effect:
nodetach        # (from command line)
logfd 2     # (from command line)
linkname myvpn      # (from /etc/ppp/peers/myvpn)
dump        # (from command line)
noauth      # (from /etc/ppp/peers/vicomvpn)
name LoginName      # (from /etc/ppp/peers/myvpn)
remotename myvpn        # (from /etc/ppp/peers/myvpn)
        # (from /etc/ppp/peers/myvpn)
pty pptp 1.2.3.4 --nolaunchpppd --loglevel 0        # (from /etc/ppp/peers/myvpn)
crtscts     # (from /etc/ppp/options)
        # (from /etc/ppp/options)
asyncmap 0      # (from /etc/ppp/options)
lcp-echo-failure 4      # (from /etc/ppp/options)
lcp-echo-interval 30        # (from /etc/ppp/options)
hide-password       # (from /etc/ppp/options)
ipparam myvpn       # (from /etc/ppp/peers/myvpn)
usepeerdns      # (from /etc/ppp/peers/myvpn)
nodeflate       # (from /etc/ppp/peers/myvpn)
require-mppe        # (from /etc/ppp/peers/myvpn)
require-mppe-128        # (from /etc/ppp/peers/myvpn)
noipx       # (from /etc/ppp/options)
Using interface ppp0
Connect: ppp0 <--> /dev/pts/22
CHAP authentication succeeded
MPPE 128-bit stateless compression enabled
local  IP address 192.168.1.142
remote IP address 192.168.1.1
primary   DNS address 19.168.1.1

Terminar a ligação VPN com:

$ sudo poff myvpn

Referência: MS-CHAP [v2] auth, configuração do cliente Microsoft VPN com pptpclient