![]() ![]() This is where IPv6 gets really easy! So you will have a subnet - it'll start with a 2. Remember that NAT is an IPv4 feature that is not used with IPv6, and that you still need to allow access through your firewall before outside devices can connect to a device using IPv6. These addresses provide your devices with a unique IP address that can easily be accessed from the internet, providing you setup the firewall as such. Your ISP will provide this, and they will give you a whole subnet to use. What you want is a "global" unicast address. Link local addresses are generated automatically, and cannot be removed or disabled. Like the name suggests, link local is only local to the link - the address will not be available from other networks. These are easy to spot, they start with an F. You'll need to read up on IPv6 - it's confusing until you get the full picture!Īll devices using IPv6 will have at a minimum a link-local address. Thanks to /u/thedarkfreak I needed an IPv6 Router to send out RAs! The DC and the test server cannot ping each other via the subnet that I configured.īut the CAN ping each other via their link-local addresses.īut this is useless as the DC is not mapping their link-local address to their DNS name. The reverse is also the same, in that the DC cannot ping the test server (or any other servers that are on this subnet via IPv6). There are no ARPs, no ICMPs that leave with no response, nothing. Pinging fd6e:73df:b6c:ae9f::1 with 32 bytes of data: My test server is: fd6e:73df:b6c:ae9f:a3bc:2531:3a9f:64b0īTW - the test server successfully gets this IP address from the DHCP server so DHCP is working on my subnet.Īt this point I'd expect that I should be able to ping the DC from the test server by typing in on the test server cmd: My domain controller (also DHCP server) is: fd6e:73df:b6c:ae9f::1 I'll go into more detail on what not working means below. The issue I've come across is that only the Link-Local address is working, and not the subnet I configured. See also my article: Ping: Request timed out vs.I'm setting up my lab to use IPv6 as I'm rolling out Direct Access and wanting to test that. For all interested, I recommend my article about the modern version of ping: The modern version of ping: Test-Connection See also In this article, I’ve tried to show the four most common situations causing an unknown error in ICMP echo requests on Windows systems. Who has broken the firewall? Without allowing outgoing ICMP Request ping leads to “General failure”.Īllow ICMPv4-Out in Outbound Rules. Which dude has deactivated the IPv4 Procotol and why? Nobody knows… Without activated IPv4 Protocol ping returns “General failure”.Īctivate the IPv4 Protocol in the settings of your network card (ncpa.cpl). Configure a default gateway, which is in the same subnet as your host. But that is not the case, the router is in the network 192.168.1.0/24 and thus in another subnet. That means that every IP address of the gateway in the range 192.168.0.1 – 192.168.0.254 is ok. ![]() ![]() In the sample screenshot, the IP address of the router or default gateway should be located in the network 192.168.0.0/24, because the client is on this network. If this is not the case, Windows reports “General failure”. The router must be in the same subnet as the “pinging” host. In the screenshot below, the computer knows what to do, because there is a routing entry for the default route and the IP Address of the default gateway is present. To keep it simple: The computer does not know what to do with the ICMP packet. This happens, when the computer tries to reach a host outside it´s own subnet. If the default gateway entry is missing, the message “General failure” could appear. In this arcticle, I describe the most common configuration errors, which cause the general failure. Ping tests the network connectivity between systems. What to do if ping returns general failure? One of the most common command line tools on all platforms is the command ping. ![]()
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