[Openswan Users] Openswan Tunnel down every 1-2 hours

[José Angel Blanco González]

Hi, I have a vpn tunnel established between an Openswan and a Cisco 
Concentrator. All is working ok.
But every 1-2 hours the peer (Cisco) stops responding. If I restart ipsec 
(/etc/init.d/ipsec restart) all starts working again.
Am I doing something wrong or maybe my peer??

Thank you
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    José Angel Blanco González
    TREELOGIC SL
    Responsable de Proyectos. Area de I+D+i
    Edificio Centroastur 2º - H
    Polígono Sía Copper 33420 Lugones
    Asturias. Spain
    Tlfno +34 985966136
    e-mail: jose at treelogic.com
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