Why does Openvpn ignore the incoming IPv6 Packets from the tunnel?

Discussion in 'Tomato Firmware' started by Pess0g, May 15, 2018.

  1. Pess0g

    Pess0g Networkin' Nut Member

    Openvpn configured into "P2P" mode is started into daemon by command line. There is no issue if the client side is running on tomato-arm. If the the client side is on tomato-mips ( Shibby v132 K26 RT-N no-USB AIO) , even in conjunction with the same config file on tomato-arm , all packets over IPv6 are lost. I am afraid I can not say "they were dropped" because "ip6tables -I INPUT -i tun -j LOG" shows zero and nothing is logged. So is " ip6tables -t mangle -I PREROUTING..." Meanwhile the server side is able to receive the incoming if ping6 "ifconfig-ipv6-remote" on the client side and send the responses. The wan-disabled tomato-mips RT-N is set "IPv6 manual" with custom IPv6 address and it can access the IPv6 network. The Openvpn client is configured with "verb 5" but there is no error in the log.

    From my test:
    ping "ifconfig-ipv6-remote" on the tomato-mips.

    packets out to the server: success
    packets into the server: success
    response from the server into the tunnel: success
    response into the client:fail
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