GoASMap

Publish IP(v4/v6) -> ASnum bindings via dns GoASMap allows to retrieve an AS information by providing a prefix or vise versa via a dns request.

Installation

go get github.com/Rezopole/goasmap

Usage

Server

To launch GoASMap a configuration file is needed goasmap -f /pth/to/config/file

Client

GoASMap uses DNS requests to map IP and ASN origin.yourzone is used to map an IPv4 address or prefix to an ASN origin6.yourzone is used to map an IPv6 address or prefix to an ASN yourzone is used to map an ASN to a list of IPv4 and IPv6 prefix

IPv4 example:

$ dig +short 1.1.168.192.origin.yourzone TXT
 "65001 | 192.168.1.0/24"

IPv6 example:

$ dig +short 0.0.0.0.0.0.c.f.origin6.yourzone TXT
 "65002 | fc00::/7"

As of now the ASN request provides a list of all prefix belonging to said ASN, this shall be changed in future updates. ASN example:

$ dig +short AS65003.yourzone TXT
 "192.168.1.0/24"

Prerequisites

You need to install Go 1.5 or later.

Configuration

GoASMap can be configured via a configuration file defined with the -f flag. The sole configuration format as of now is toml.

GoASMap uses the same configuration syntax as GoBGP (https://github.com/osrg/gobgp/blob/master/docs/sources/getting-started.md), with added fields for GoASMap.

[global.config]
as = 64512
router-id = "192.168.255.1"

[[neighbors]]
[neighbors.config]
neighbor-address = "10.0.255.1"
peer-as = 65001
[neighbors.ebgp-multihop.config]
enabled = true
multihop-ttl = 3

[dns]
ip = ""
port = "53"
zone = "/path/to/zone/file.zone"
max = 100

[IPV6]
ip = ["fc00::/7,65003"]
include = ["/custom/iplist/ipv6_custom"]

[IPV4]
ip = ["192.168.1.0/24,65002"]
include = ["/custom/iplist/ipv4_custom"]

Custom IPv4 and IPv6 fields can be added with ip as key and an array containing a prefix and ASN or any other information you wish to display, separated by a comma as value, or files can be included with include as key that has an array of paths to said files containing the same format.

$ cat /custom/iplist/ipv4_custom
[IPV4]
ip = ["0.0.0.0/8,LOCAL IDENTIFICATION",
"10.0.0.0/8,RCF1918",
"192.168.0.0/16,RFC1918",
"42.42.42.0/24,65004"]

Dependencies

GoASMap uses govendor to manage dependencies with third party packages. To download all tested versions of all packages used by GoASMap use the following command:

govendor sync