Openvpn idle bandwidth consumption too much?



  • Hi all,

    I have two pfsense connect with Openvpn tunnel with peer to peer shared key.

    In idle the tunnel network consumption is arround 700 kbps,I think it is much especially since I have about 800 kbps upload one on each side (ADSL).

    I turned off all the equipment (PC etc. ..) on each side, it looks like its come from the tunnel.

    I used the configuration in http://doc.pfsense.org/index.php/OpenVPN_Site-to-Site_(Shared_Key,_2.0)

    Help please


  • Rebel Alliance Developer Netgate

    Have you done a packet capture on the tunnel to see what the traffic is?

    Normally the only idle traffic would be a ping/response once every 10 seconds with only minimal usage then.



  • I've seen similar issues on an OpenVPN p2p shared key setup we have.  We were using FreeNAS (now Nas4Free) and ultimately a reboot of the NAS server cleared it up, though I am still not sure of the exact cause.  What services/traffic do you typically push over the OVPN link?


  • LAYER 8 Global Moderator

    Until you do a sniff your just going to be guessing.

    Troubleshooting: Unexplained network traffic
    Step 1) Sniff the traffic to see what it is
    Step 2) Fix what is causing the unwanted traffic you see in step 1
    Step 3) Relax and have a beer.


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