as112.massars.net - AS112 Anycast Node
The following abstract from RFC7534 describes the purpose of this node:
Many sites connected to the Internet make use of IPv4 addresses that are not globally unique. Examples are the addresses designated in RFC 1918 for private use within individual sites. Devices in such environments may occasionally originate Domain Name System (DNS) queries (so-called "reverse lookups") corresponding to those private-use addresses. Since the addresses concerned have only local significance, it is good practice for site administrators to ensure that such queries are answered locally. However, it is not uncommon for such queries to follow the normal delegation path in the public DNS instead of being answered within the site. It is not possible for public DNS servers to give useful answers to such queries. In addition, due to the wide deployment of private-use addresses and the continuing growth of the Internet, the volume of such queries is large and growing. The AS112 project aims to provide a distributed sink for such queries in order to reduce the load on the corresponding authoritative servers. The AS112 project is named after the Autonomous System Number (ASN) that was assigned to it. This document describes the steps required to install a new AS112 node and offers advice relating to such a node's operation.
Prefixes announced by this node
The following prefixes are announced from AS112 by this node as per RFC7534:
|IPv4 Prefix||IPv6 Prefix||Hosts|
|184.108.40.206/24||2620:4f:8000::/48||blackhole-1.iana.org + blackhole-2.iana.org + prisoner.iana.org|
This AS112 node is announced from behind AS57777 and thus any peer of AS57777 can automatically use it if BGP path selection wins.
What AS112 Anycast Node does my host use?
One can determine which AS112 node a host is reaching with a
dig command like:
$ dig hostname.as112.net txt ; <<>> DiG <<>> hostname.as112.net txt ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 26890 ;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 1232 ;; QUESTION SECTION: ;hostname.as112.net. IN TXT ;; ANSWER SECTION: hostname.as112.net. 300 IN TXT "See http://www.as112.net/ for more information." hostname.as112.net. 300 IN TXT "Massar's Network" "Zurich, CH" hostname.as112.net. 300 IN TXT "Unique IP: 220.127.116.11" hostname.as112.net. 300 IN TXT "Unique IP: 2a10:fc42:b::78" ;; Query time: 0 msec ;; SERVER: 18.104.22.168#53(22.214.171.124) (UDP) ;; MSG SIZE rcvd: 224 $ dig +noall +answer hostname.as112.net loc hostname.as112.net. 183 IN LOC 47 22 34.000 N 8 29 21.000 E 0.00m 1m 10000m 10m
Live Usage Statistics are forthcoming.