openVPN vs PPTP?

Discussion in 'Tomato Firmware' started by cloneman, Aug 23, 2014.

  1. cloneman

    cloneman Addicted to LI Member

    I was wondering what kind of throughput and side effects come with using tomato for VPN. (shibby , modern versions etc.) Looking for general experiences and comments.

    I setup a PPTP Server on an Asus RTN-66u - the load quickly climbs above 1.5 when using about 8mbits of traffic, especially with encryption on.

    Can anyone comment on the feasability of various setups? What's the consequence of such a high load? Can the VPN service be throttled to use 40% of the cpu maximum?

    What sort of load/throughput can we expect when the router acts as a client instead?

    Last question: if your router is in client mode, how do you make it so your computers get a VPN IP address, instead of the router (I believe they call this site to site)?
  2. gfunkdave

    gfunkdave LI Guru Member

    By VPN IP, do you mean an IP on the same subnet as the LAN of the router acting as the OpenVPN server? If so, you need to configure your VPN as a TAP VPN with your server router's IP set as the DHCP server for both LANs.

    In TUN mode, the server router and each client will be assigned an IP not in the same subnet as any of their LANS. These VPN IPs are used for the VPN tunnel only.

    Make sense?
    cloneman likes this.
  3. cloneman

    cloneman Addicted to LI Member

    Thanks. Now I know what those mean :^D. I guess the bundled PPTP client on tomato shibby does not support TAP. The option is there for OpenVPN however.
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