Hello Markus,   
      
   On Sunday August 12 2018 16:41, you wrote to me:   
      
    MvdV>> Before I start complaining to my ISP, I would like to make sure   
    MvdV>> that it is not due to some change on the part of ipv6-test.com.   
      
    MvdV>> Wilfred says he has the same message, but I would like some   
    MvdV>> more comfirmation. Does anyone NOT get the "filtered ICMPV6"   
    MvdV>> message from ipv6-test.com?   
      
    MR> I get 20/20 with a RFC4890 based ICMP filter set.   
      
   That confirms the problem is on my end.  Thank you.   
      
   I just found the button to completely disable the IPv6 firewall. I get 20/20   
   with the IPv6 firewall disabled. I should have thought about that before, but   
   I was stuck with a setting somewehere else that said "block ICMP". That did   
   not make any difference...   
      
   I am a bit reluctant to complain with the ISP because their "standard"   
   solution seems to be to send a new modem/router. That will almost certainly   
   make me lose Dual Stack. This particular model is the only one configured for   
   Dual Stack and it is being fased out. The newer models are configured IOv4   
   only for existing customers and DS-Lite for new customers...   
      
      
   Cheers, Michiel   
      
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