Is FWG blocking ICMPv6 WAN->local Clients?

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Alex

• March 12, 2021 06:33
• Edited

Hi,

Regarding to https://ipv6-test.com my client has an IPv6 address. It only says that ICMP (v6) is blocked ..

"IPv6 relies heavily on ICMP

How can you improve your score ?

 

Your router or firewall is filtering ICMPv6 messages sent to your computer. An IPv6 host that cannot receive ICMP messages may encounter problems like some web pages loading partially or not at all."

 

I think firewalla is blocking all wan traffic by default .. I cannot find any setting in the app to allow icmpv6 traffic and don't know if this is really important .. firewalla team, whats your opinion? Is it really necessary to allow icmpv6?

 

Thanks

Alex

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  Firewalla

  • March 12, 2021 17:50

  Try Settings->Advanced->Configurations->Block ICMP.  

  By default, firewalla tries very hard to shield your network and blocking ping and other probs is one of the functions that are on by default. 

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  Alex

  • March 12, 2021 20:11

  With this setting I can only ping the public ipv4 address from firewalla, no difference for the public ipv6 client address.

  I think blocking ipv4 is important and pinging is not necessary. .. but mybe on ipv6? I don't know.

  (by the way .. my client is not blocking the ping .. I tried it with another router, there was ipv6 icmp on by default and cannot be disabled ..)

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  Dion Warj

  • August 02, 2022 09:02

  Is it possible to continue blocking ipv4 but allow ICMP for IPv6 so the test passes?

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  Derek Seaman

  • February 26, 2023 21:15

  I just ran into this issue myself. IPv6 test site says "ICMP" is filtered. I turned off the Block ICMP on my WAN interface, but the test site still says ICMP v6 is filtered.

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  Firewalla

  • February 27, 2023 03:31

  Are you using the Firewalla's IPv6 address? if you are double check you are not using the fexx... address 

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  sk0rp10

  • May 24, 2025 11:27

  Two years on I also have this exact issue. Firewalla seems to not let any ICMPv6 through regardless of the block ICMP setting

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  Firewalla

  • May 26, 2025 18:49

  May I know which ICMP settings are you talking about? the ingress firewall will block any incoming traffic to v6 and v4 traffic

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