The provider establishes a gateway (or cluster of gateways) in its internal network and customer gateways are configured to use this gateway. Unfortunately this service has become quite unreliable since public gateway servers seem to be unable to scale with the demand for prefixes.Ħrd is the provider internal equivalent of 6to4. All 6to4 prefixes are in the 2002::/16 network and are /48 bits long (16bits for 2002::/16 and 32bits from the IPv4 address of the gateway). Both use the 6in4 encapsulation to transport IPv6 packets inside IPv4 packets between the border gateway of the local network and the gateway servers outside.Ħto4 is a public service, everybody can configure a gateway to use it - no subscription is necessary, since gateways will always know where to route responses based on the prefix. With both mechanisms you can assign an IPv6 prefix to an entire network based on the IPv4 address of the gateway. Please use hexadecimal notation with the relevant 32 bits to the far right.Ħto4 and 6rd are transitional mechanisms that will be used until native IPv6 is universally available. Depending on your application you may have to shift the IPv6 segments. This form allows you to convert from IPv4 to IPv6 and back. In some configurations IPv4 addresses can be written or used in IPv6 notation or they become part of an IPv6 address. Link Broadcast - this is sent to all hosts on the same network link, but does not cross routers there is no default gateway or broadcast for multicasting Multicasts (former Class D network) - Warning: the data shown when you click this network is not completely accurate - e.g. TEST-NET-2, Documentation and examples TEST-NET-3, Documentation and examples Network benchmark tests, this should never be used in production networks. MacOS and Linux with Avahi installed) and are only usable for local communication in the LAN segment. These are automatically generated by some operating systems and (e.g. The entire 127.*.*.* network is reserved for (host-)local networking. Is the localhost address, used by each host to talk to itself, there is always a special loopback interface preconfigured with this address, you never assign it to a real network device. The whole network 0.*.*.* is reserved for special purposes (like DHCP).ġ0.*.*.* 172.16.*.* - 172.31.*.* 192.168.*.*Īre private addresses - you can use them freely within your own LAN. The "ANY" address that is used by programs to speak to all network interfaces, it is never used directly. The inet6 line of the eth0 listing indicates to me that the entire /64 upon which the listed address resides is allocated as link-local to this machine, but I'm not 100% sure this is true.The following special addresses and networks exist in IPv4: TX packets:4007947 errors:0 dropped:0 overruns:0 carrier:0 RX packets:4007947 errors:0 dropped:0 overruns:0 frame:0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 My network is setup in the following manner: $ ifconfigĮth0 Link encap:Ethernet HWaddr 00:18:f8:0d:c0:d5 I'm using a test machine running Ubuntu Server 13.10: $ uname -a The fact that it's able to bind to different addresses allows it to bypass some automatic per-hostname throttling and cause trouble despite existing measures in place.īasically, the problem I'm trying to solve boils down to this. It binds to a bunch of ip addresses on an IPv6 /64 and is then used to flood IRC from hundreds or thousands of different ip addresses. I'm trying to replicate a malicious script that I've seen in the wild for the purposes of testing my options to respond to it. I'm not 100% sure I'm using the correct terminology in the title, so if someone knows better than I do please amend it.
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