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Is the ICMP echo request allowed in IPv6?
ICMPv6 Echo Request and Echo Response It is not thought that there is a significant risk from scanning attacks on a well-designed IPv6 network (see Section 3.2), and so connectivity checks should be allowed by default. Is this point still valid, given the RFC is almost 10 years old?
Why is ICMPv6 not working IPv6 Test.com?
Allowing all ICMPv6 could actually pose a security threat because of some of its uses within a network as far as neighbor discovery and whatnot. Thanks – Changed “ICMPv6 Echo any” for “ICMPv6 Echo Requests” – http://ipv6-test.com/ is still happy.
How to create an inbound ICMP network rule?
This topic describes how to create a port rule that allows inbound ICMP network traffic. For other inbound port rule types, see: Open the Group Policy Management Console to Windows Defender Firewall with Advanced Security. In the navigation pane, click Inbound Rules. Click Action, and then click New rule.
How to allow inbound ICMP traffic in Windows 10?
Windows 10; Windows Server 2016; To allow inbound Internet Control Message Protocol (ICMP) network traffic, use the Windows Defender Firewall with Advanced Security node in the Group Policy Management MMC snap-in to create firewall rules. This type of rule allows ICMP requests and responses to be sent and received by computers on the network.
Do you need to allow ICMP in IPv4?
In IPv4 there’s is a misunderstanding that all incoming ICMP should be blocked, and you can get away with that. With IPv6 you really need to allow at least some ICMP. Take a look at https://tools.ietf.org/html/rfc4890, it contains some really good advice on how to filter ICMP without breaking the protocol.
What are the most important problems in IPv6?
The most important ones are Packet-Too-Big and Parameter-Problem. If you block those then you will get connectivity issues. Also: the IPv6 equivalent of ARP is neighbour-discovery, which uses ICMP packets as well. The stateless auto configuration is part of neighbour discovery, so also needs ICMP.