Eu configurei um acesso VPN em um Fritzbox. Agora estou tentando configurar um cliente VPN em uma máquina CentOS 6. Para isso instalei o vpnc e o NetworkManager-vpnc e estou seguindo a descrição emhttp://tosit.de/aktuelles/vpn-verbindung-unter-ubuntu-zu-fritzbox.html
Mas toda vez que tento conectar a VPN (na linha de comando "vpnc") recebo o erro
vpnc: vpnc.c:1166: lifetime_ike_process: Assertion `0' failed.
Além disso, se eu tentar com o networkManager com saída de depuração habilitada (nm-vpnc-service --debug), recebo:
** Message: <info> vpnc started with pid 13161
vpnc: vpnc.c:1166: lifetime_ike_process: Assertion `0' failed.
** (process:13150): WARNING **: <WARN> vpnc_watch_cb(): vpnc died with signal 6
Em /var/log/message (lado do cliente), recebo:
Dec 18 19:02:30 lifebook01 NetworkManager[12964]: <info> Starting VPN service 'org.freedesktop.NetworkManager.vpnc'...
Dec 18 19:02:30 lifebook01 NetworkManager[12964]: <info> VPN service 'org.freedesktop.NetworkManager.vpnc' started (org.freedesktop.NetworkManager.vpnc), PID 13282
Dec 18 19:02:30 lifebook01 NetworkManager[12964]: <info> VPN service 'org.freedesktop.NetworkManager.vpnc' appeared, activating connections
Dec 18 19:02:30 lifebook01 NetworkManager[12964]: <info> VPN plugin state changed: 1
Dec 18 19:02:35 lifebook01 NetworkManager[12964]: <info> VPN plugin state changed: 3
Dec 18 19:02:35 lifebook01 NetworkManager[12964]: <info> VPN connection 'Fritzbox test' (Connect) reply received.
Dec 18 19:02:35 lifebook01 kernel: tun0: Disabled Privacy Extensions
Dec 18 19:02:35 lifebook01 NetworkManager[12964]: <info> VPN plugin state changed: 6
Dec 18 19:02:35 lifebook01 NetworkManager[12964]: <info> VPN plugin state change reason: 0
Dec 18 19:02:35 lifebook01 NetworkManager[12964]: <warn> error disconnecting VPN: Could not process the request because no VPN connection was active.
Dec 18 19:02:35 lifebook01 NetworkManager[12964]: <info> Policy set 'System eth0' (eth0) as default for IPv4 routing and DNS.
Alguém sabe qual é o problema aqui ou como posso obter uma mensagem de erro melhor?