INEX operates an AS112 service. This system provides anycast reverse DNS lookup for several prefixes, namely:
- 10.0.0.0/8
- 192.168.0.0/16
- 172.16.0.0/12
- 169.254.0.0/16
Because these IP addresses are widely used for private networking, many end-user systems are configured to perform reverse DNS lookups for these address ranges. DNS lookups for these ranges should always be null-answered quickly, in order to make sure that DNS retransmits don’t occur (thereby overloading local DNS resolvers), and to prevent end-user systems from hanging due to DNS lookups.
AS112 services are provided around the world by a group of volunteers.
Connectivity to this service is available to all INEX members at no charge. To avail of this service, please contact INEX operations, and we will set up a BGP peering session on the INEX AS112 server.
Technical contact, NOC and emergency phone numbers are the same as for INEX Operations, and are available on www.inex.ie/members/support.
Configuration Details
For Cisco routers, you will need something like the following simple example BGP configuration for primary peering LAN #1:
router bgp 64496
! INEX Peering LAN #1
neighbor 185.6.36.6 remote-as 112
neighbor 185.6.36.6 description INEX AS112 Service
!
neighbor 2001:7f8:18::6 remote-as 112
neighbor 2001:7f8:18::6 description INEX AS112 Service
!
address-family ipv4
neighbor 185.6.36.6 activate
neighbor 185.6.36.6 prefix-list pl-v4-announce-to-inex out
!
address-family ipv6
neighbor 2001:7f8:18::6 activate
neighbor 2001:7f8:18::6 prefix-list pl-v6-announce-to-inex out